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User's Manual U11919EJ3V0UM00

CHAPTER 4 PORT FUNCTIONS

4.1 Functions of Ports

The

PD789026 Subseries provides the ports shown in Figure 4-1, enabling various methods of control.

Alternate functions are provided in addition to the digital I/O port function. For more information on these

alternate functions, see Chapter 2.

Figure 4-1. Port Types

Port 2

P20

P22

P30

P32

P40

P47

P50

P53

P00

P07

P10

P17

Port 3

Port 0

Port 1

Port 4

Port 5

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Summary of Contents for UPD789026 Series

Page 1: ...2 PD789024 PD789025 PD789026 PD78F9026A PD789026 Subseries 8 Bit Single Chip Microcontrollers 1998 Printed in Japan Document No U11919EJ3V0UMJ1 3rd edition Date Published October 2000 N CP K 1996 1999...

Page 2: ...User s Manual U11919EJ3V0UM00 2 MEMO www DataSheet4U com...

Page 3: ...TIMER 93 CHAPTER 7 8 BIT TIMER EVENT COUNTER 105 CHAPTER 8 WATCHDOG TIMER 115 CHAPTER 9 SERIAL INTERFACE 00 121 CHAPTER 10 INTERRUPT FUNCTIONS 149 CHAPTER 11 STANDBY FUNCTION 167 CHAPTER 12 RESET FUNC...

Page 4: ...p or pull down circuitry Each unused pin should be connected to VDD or GND with a resistor if it is considered to have a possibility of being an output pin All handling related to the unused pins must...

Page 5: ...C semiconductor products customers must incorporate sufficient safety measures in their design such as redundancy fire containment and anti failure features NEC semiconductor products are classified i...

Page 6: ...ins in Table 2 1 p 99 Addition of cautions on rewriting CR20 to Section 6 4 1 p 106 Addition of cautions on rewriting CR00 to Section 7 2 1 p 109 Addition of description of operation to Section 7 4 1...

Page 7: ...many GmbH Duesseldorf Germany Tel 0211 65 03 02 Fax 0211 65 03 490 NEC Electronics UK Ltd Milton Keynes UK Tel 01908 691 133 Fax 01908 670 290 NEC Electronics Italiana s r l Milano Italy Tel 02 66 75...

Page 8: ...User s Manual U11919EJ3V0UM00 8 MEMO www DataSheet4U com...

Page 9: ...set Instruction description How to Read This Manual It is assumed that the readers of this manual have general knowledge on electric engineering logic circuits and microcontrollers To understand the o...

Page 10: ...U11599E U11599J RA78K0S Assembler Package Structured Assembly Language U11623E U11623J Operation U11816E U11816J CC78K0S C Compiler Language U11817E U11817J SM78K0S System Simulator Windows TM Based R...

Page 11: ...531E C11531J NEC Semiconductor Device Reliability Quality Control System C10983E C10983J Guide to Prevent Damage for Semiconductor Devices by Electrostatic Discharge ESD C11892E C11892J Semiconductor...

Page 12: ...User s Manual U11919EJ3V0UM00 12 MEMO www DataSheet4U com...

Page 13: ...Port 4 36 2 2 6 P50 to P53 Port 5 37 2 2 7 RESET 37 2 2 8 X1 X2 37 2 2 9 NC 37 2 2 10 VDD 37 2 2 11 VSS 37 2 2 12 VPP PD78F9026A only 37 2 2 13 IC mask ROM model only 38 2 3 Pin Input Output Circuits...

Page 14: ...Functions 83 4 4 1 Writing to I O port 83 4 4 2 Reading from I O port 83 4 4 3 Arithmetic operation of I O port 83 CHAPTER 5 CLOCK GENERATION CIRCUIT 85 5 1 Function of Clock Generation Circuit 85 5 2...

Page 15: ...Timer 119 8 4 1 Operation as watchdog timer 119 8 4 2 Operation as interval timer 120 CHAPTER 9 SERIAL INTERFACE 00 121 9 1 Serial Interface 00 Functions 121 9 2 Serial Interface 00 Configuration 121...

Page 16: ...peration 185 14 1 1 Operand identifiers and writing methods 185 14 1 2 Description of Operation column 186 14 1 3 Description of Flag column 186 14 2 Operation List 187 14 3 Instructions Listed by Add...

Page 17: ...ed to Stack Memory 55 3 15 Data to be Restored from Stack Memory 55 3 16 General Purpose Register Configuration 56 4 1 Port Types 69 4 2 Block Diagram of P00 to P07 71 4 3 Block Diagram of P10 to P17...

Page 18: ...Timing with Rising Edge Specified 111 7 6 Square Wave Output Timing 113 7 7 8 Bit Timer Counter 00 Start Timing 114 7 8 External Event Counter Operation Timing 114 8 1 Block Diagram of Watchdog Timer...

Page 19: ...on 163 10 14 Example of Nesting 164 11 1 Oscillation Settling Time Select Register Format 168 11 2 Releasing HALT Mode by Interrupt 170 11 3 Releasing HALT Mode by RESET Input 171 11 4 Releasing STOP...

Page 20: ...Timer Event Counter 00 105 7 3 Configuration of 8 Bit Timer Event Counter 00 106 7 4 Interval Time of 8 Bit Timer Event Counter 00 109 7 5 Square Wave Output Range of 8 Bit Timer Event Counter 00 112...

Page 21: ...ng Status 169 11 2 Operation after Release of HALT Mode 171 11 3 STOP Mode Operating Status 172 11 4 Operation after Release of STOP Mode 174 12 1 Hardware Status after Reset 177 13 1 Differences betw...

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Page 23: ...cution time from high speed 0 4 s with 5 0 MHz system clock to slow 1 6 s with 5 0 MHz system clock I O port 34 lines Serial interface 1 channel 3 wire serial I O mode UART mode selection Timer 3 chan...

Page 24: ...0 mil Mask ROM PD789025GB 3BS MTX 44 pin plastic QFP 10 10 mm resin thickness 2 7 mm Mask ROM PD789025GB 8ES 44 pin plastic LQFP 10 10 mm resin thickness 1 4 mm Mask ROM PD789026CU 42 pin plastic shri...

Page 25: ...0 TI0 TO0 P32 INTP2 CPT2 P31 INTP1 P30 INTP0 P22 RxD SI0 P21 TxD SO0 P20 ASCK SCK0 P07 P06 P05 P04 P03 P02 P01 P00 VDD1 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 VSS0 X1 X2 IC VPP...

Page 26: ...3 4 5 6 7 8 9 10 11 P12 P11 P10 P47 KR7 P46 KR6 P45 KR5 P44 KR4 P43 KR3 P42 KR2 P41 KR1 P40 KR0 NC IC V PP X2 X1 V SS0 V DD1 RESET P53 P52 P51 TO2 P50 TI0 TO0 33 32 31 30 29 28 27 26 25 24 23 P03 P04...

Page 27: ...NTP0 to INTP2 Interrupt from Peripherals SI0 Serial Input KR0 to KR7 Key Return SO0 Serial Output NC Non connection TI0 Timer Input P00 to P07 Port 0 TO0 TO2 Timer Output P10 to P17 Port 1 TxD Transmi...

Page 28: ...pin PD789046 Device developed by adding the subsystem clock to the PD789026 30 pin 30 pin 30 pin 30 pin PD789124A PD789134A PD789217AY PD789197AY PD789177 PD789167 30 pin 30 pin PD789104A PD789114A Wi...

Page 29: ...146 8 K to 16 K 4 ch EEPROM on chip PD789134A 4 ch PD789124A 4 ch RC oscillation PD789114A 4 ch General compact A D PD789104A 2 K to 8 K 1 ch 1 ch 1 ch 4 ch 1 ch UART 1 ch 20 1 8 V Inverter control PD...

Page 30: ...NTERFACE 00 SI0 RxD P22 SCK0 ASCK P20 INTERRUPT CONTROL SYSTEM CONTROL INTP0 P30 to INTP2 CPT2 P32 KR0 P40 to KR7 P47 X1 X2 RESET PORT0 P00 to P07 PORT1 P10 to P17 PORT2 P20 to P22 PORT3 WATCHDOG TIME...

Page 31: ...1 channel Timer output 2 Maskable Internal 5 External 4 Vectored interrupt source Non maskable Internal 1 Power supply voltage VDD 1 8 to 5 5 V Operating ambient temperature TA 40 C to 85 C Package 4...

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Page 33: ...ed as input port on chip pull up resistor can be connected by setting of the pull up resistor option register PUO LEDs can be driven directly Input SI0 RxD P30 INTP0 P31 INTP1 P32 Input output Port 3...

Page 34: ...P22 SI0 TxD Output Asynchronous serial interface serial data output Input P21 SO0 TO2 Output 16 bit timer TM20 output Input P51 CPT2 Input 16 bit timer capture edge input Input P32 INTP2 TI0 Input Ext...

Page 35: ...output the data and clock of the serial interface This port can drive LEDs directly Port 2 can be specified in the following operation modes in bit wise 1 Port mode In this mode port 2 functions as a...

Page 36: ...xternal interrupt input a INTP0 to INTP2 These pins input external interrupt for which effective edges rising edge falling edge and both the rising and falling edges can be specified b CPT2 This is a...

Page 37: ...output a TI0 This is the external clock input pin for 8 bit timer event counter b TO0 This is an 8 bit timer output pin C TO2 This is a 16 bit timer output pin 2 2 7 RESET This pin inputs an active lo...

Page 38: ...l operating mode directly connect the IC pin to the VSS0 or VSS1 pin with as short a wire as possible If a potential difference is generated between the IC pin and VSS0 or VSS1 pin due to a long wirin...

Page 39: ...d Pins Pin Name I O Circuit Type Input Output Recommended Connection for Unused Pins P00 to P07 P10 to P17 5 X P20 ASCK SCK0 8 J P21 TxD SO0 5 X P22 RxD SI0 P30 INTP0 P31 INTP1 P32 INTP2 CPT2 P40 KR0...

Page 40: ...ut Output Circuits Schmitt triggered input with hysteresis characteristics Type 2 IN VDD P ch IN OUT VDD0 P ch N ch Pullup enable Output data Output disable Type 8 J IN OUT VDD0 P ch VDD0 P ch N ch Pu...

Page 41: ...e memory maps Figure 3 1 Memory Map PD789022 FFFFH FF00H FEFFH FE00H FDFFH 1000H 0FFFH 0000H 0FFFH 0000H 0080H 007FH 0040H 003FH 002CH 002BH Data Memory Space Program Memory Space Special Function Reg...

Page 42: ...H FE00H FDFFH 2000H 1FFFH 0000H 1FFFH 0000H 0080H 007FH 0040H 003FH 002CH 002BH Data Memory Space Program Memory Space Special Function Registers 256 8 bits Internal High Speed RAM 256 8 bits Reserved...

Page 43: ...FD00H FCFFH 3000H 2FFFH 0000H 2FFFH 0000H 0080H 007FH 0040H 003FH 002CH 002BH Data Memory Space Program Memory Space Special Function Registers 256 8 bits Internal High Speed RAM 512 8 bits Reserved...

Page 44: ...FD00H FCFFH 4000H 3FFFH 0000H 3FFFH 0000H 0080H 007FH 0040H 003FH 002CH 002BH Data Memory Space Program Memory Space Special Function Registers 256 8 bits Internal High Speed RAM 512 8 bits Reserved...

Page 45: ...00H FCFFH 4000H 3FFFH 0000H 3FFFH 0000H 0080H 007FH 0040H 003FH 002CH 002BH Data Memory Space Program Memory Space Special Function Registers 256 8 bits Internal High Speed RAM 512 8 bits Reserved Int...

Page 46: ...ternal program memory space 1 Vector table area A 44 byte area of addresses 0000H to 002BH is reserved as a vector table area This area stores program start addresses to be used when branching by the...

Page 47: ...pacity on each product The internal high speed RAM can also be used as a stack memory Table 3 3 Internal High Speed RAM Capacity Part Number Capacity PD789022 PD789024 256 8 bits PD789025 PD789026 PD7...

Page 48: ...unctions of the special function registers SFR and other registers Figures 3 6 through 3 10 show the data memory addressing modes Notes 1 With PD789022 or PD789024 2 With PD789025 PD789026 or PD78F902...

Page 49: ...FFH 2000H 1FFFH 0000H FF00H FEFFH FF20H FF1FH FE20H FE1FH Special Function Registers SFR 256 8 bits Internal High Speed RAM 256 8 bits Reserved Internal ROM 8 192 8 bits SFR Addressing Short Direct Ad...

Page 50: ...FFH 3000H 2FFFH 0000H FF00H FEFFH FF20H FF1FH FE20H FE1FH Special Function Registers SFR 256 8 bits Internal High Speed RAM 512 8 bits Reserved Internal ROM 12 288 8 bits SFR Addressing Short Direct A...

Page 51: ...FFH 4000H 3FFFH 0000H FF00H FEFFH FF20H FF1FH FE20H FE1FH Special Function Registers SFR 256 8 bits Internal High Speed RAM 512 8 bits Reserved Internal ROM 16 384 8 bits SFR Addressing Short Direct A...

Page 52: ...4000H 3FFFH 0000H FD00H FCFFH FF00H FEFFH FF20H FF1FH FE20H FE1FH Special Function Registers SFR 256 8 bits Internal High Speed RAM 512 8 bits Reserved Internal Flash Memory 16 384 8 bits SFR Address...

Page 53: ...the instruction to be fetched When a branch instruction is executed immediate data or register contents is set RESET input sets the reset vector table values at addresses 0000H and 0001H to the progra...

Page 54: ...ag is reset to 0 upon DI instruction execution or interrupt acknowledgment and is set to 1 upon EI instruction execution b Zero flag Z When the operation result is zero this flag is set to 1 It is res...

Page 55: ...fined be sure to initialize the SP before instruction execution Figure 3 14 Data to be Saved to Stack Memory Figure 3 15 Data to be Restored from Stack Memory 0 15 SP14 SP15 SP SP13 SP12 SP11 SP10 SP9...

Page 56: ...sters in pairs can be used as a 16 bit register AX BC DE and HL They can be written in terms of functional names X A C B E D L H AX BC DE and HL and absolute names R0 to R7 and RP0 to RP3 Figure 3 16...

Page 57: ...r This manipulation can also be specified with an address 16 bit manipulation Writes a symbol reserved with assembler for the 16 bit manipulation instruction operand When specifying an address write a...

Page 58: ...ort mode register 1 PM1 FF22H Port mode register 2 PM2 FF23H Port mode register 3 PM3 FF24H Port mode register 4 PM4 FF25H Port mode register 5 PM5 FFH FF42H Timer clock select register 2 TCL2 R W 00H...

Page 59: ...ister 0 IF0 FFE1H Interrupt request flag register 1 IF1 00H FFE4H Interrupt mask flag register 0 MK0 FFE5H Interrupt mask flag register 1 MK1 FFH FFECH External interrupt mode register 0 INTM0 FFF5H K...

Page 60: ...ive addressing Function The value obtained by adding 8 bit immediate data displacement value jdisp8 of an instruction code to the start address of the following instruction is transferred to the progr...

Page 61: ...ransferred to the program counter PC and branched This function is carried out when the CALL addr16 or BR addr16 instruction is executed CALL addr16 and BR addr16 instructions can branch to all the me...

Page 62: ...executed This instruction can refer to the address stored in the memory table 40H to 7FH and branch to all the memory spaces Illustration 15 1 15 0 PC 7 0 Low Addr High Addr Memory Table Effective Add...

Page 63: ...ction execution 3 4 1 Direct addressing Function The memory indicated by immediate data in an instruction word is directly addressed Operand format Identifier Description addr16 Label or 16 bit immedi...

Page 64: ...ter of the timer event counter are mapped and these SFRs can be manipulated with a small number of bytes and clocks When 8 bit immediate data is at 20H to FFH bit 8 of an effective address is set to 0...

Page 65: ...essing is applied to the 240 byte spaces FF00H to FFCFH and FFE0H to FFFFH However the SFR mapped at FF00H to FF1FH can also be accessed with short direct addressing Operand format Identifier Descript...

Page 66: ...xecuted When an 8 bit register is specified one of the eight registers is specified with 3 bits in the instruction code Operand format Identifier Description r X A C B E D L H rp AX BC DE HL r and rp...

Page 67: ...ed is specified with the register pair specification code in the instruction code This addressing can be carried out for all the memory spaces Operand format Identifier Description DE HL Example MOV A...

Page 68: ...Operand format Identifier Description HL byte Example MOV A HL 10H When setting byte to 10H Instruction Code 0 0 1 0 1 1 0 1 0 0 0 1 0 0 0 0 3 4 7 Stack addressing Function The stack area is indirectl...

Page 69: ...wn in Figure 4 1 enabling various methods of control Alternate functions are provided in addition to the digital I O port function For more information on these alternate functions see Chapter 2 Figur...

Page 70: ...input port on chip pull up resistor can be connected by setting of the pull up resistor option register PUO LEDs can be driven directly Input SI0 RxD P30 INTP0 P31 INTP1 P32 Input output Port 3 3 bit...

Page 71: ...utput latch Port 0 can be specified in the input or output mode in 1 bit units by using the port mode register 0 PM0 When using P00 to P07 pins as input port pins on chip pull up resistors can be conn...

Page 72: ...ns on chip pull up resistors can be connected in 8 bit units by using the pull up resistor option register PUO RESET input sets port 1 to input mode Figure 4 3 shows the block diagram of port 1 Figure...

Page 73: ...ata I O and clock I O pins of the serial interface RESET input sets port 2 to input mode Figures 4 4 through 4 6 show the block diagrams of port 2 Caution When using the pins of port 2 as the serial i...

Page 74: ...re 4 5 Block Diagram of P21 Internal Bus WRPUO RD WRPORT WRPM Output Latch P21 PM21 Selector PUO2 VDD0 P ch P21 TxD SO0 Alternate Function PUO Pull up resistor option register PM Port mode register RD...

Page 75: ...re 4 6 Block Diagram of P22 Internal Bus WRPUO RD WRPORT WRPM Output Latch P22 PM22 Selector PUO2 VDD0 P ch P22 RxD SI0 Alternate Function PUO Pull up resistor option register PM Port mode register RD...

Page 76: ...he pull up resistor option register PUO The pins of this port are also used as the external interrupt input and capture edge input RESET input sets port 3 to input mode Figure 4 7 shows the block diag...

Page 77: ...he key return input RESET input sets port 4 to input mode Figure 4 8 shows the block diagram of port 4 Caution When using port 4 for the key return function it is necessary to set key return mode regi...

Page 78: ...bit units by using the pull up resistor option register PUO The pins of this port are also used as the data I O pins of the timer RESET input sets port 5 to input mode Figures 4 9 through 4 11 show th...

Page 79: ...ure 4 10 Block Diagram of P51 Internal Bus VDD0 P ch P51 TO2 WRPUO RD WRPORT WRPM PUO5 Output Latch P51 PM51 Alternate Function Selector PUO Pull up resistor option register PM Port mode register RD P...

Page 80: ...igure 4 11 Block Diagram of P52 and P53 Internal Bus WRPUO RD WRPORT WRPM PUO5 Ouput Latch P52 P53 PM52 PM53 VDD0 P ch P52 P53 Selector PUO Pull up resistor option register PM Port mode register RD Po...

Page 81: ...n the port function output mode is specified and the output level is changed the interrupt request flag is set When the output mode is used therefore the interrupt mask flag should be set to 1 beforeh...

Page 82: ...mory manipulation instruction RESET input clears PUO to 00H Figure 4 13 Pull Up Resistor Option Register Format PMmn 0 Output mode output buffer ON Input mode output buffer OFF 1 Pmn Pin Input Output...

Page 83: ...n that is set in the input mode and not subject to manipulation become undefined 4 4 2 Reading from I O port 1 In output mode The contents of an output latch can be read by using a transfer instructio...

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Page 85: ...ing the STOP instruction 5 2 Configuration of Clock Generation Circuit The clock generation circuit consists of the following hardware Table 5 1 Configuration of Clock Generation Circuit Item Configur...

Page 86: ...a 1 bit or 8 bit memory manipulation instruction RESET input sets PCC to 02H Figure 5 2 Processor Clock Control Register Format CPU Clock fCPU Selection PCC1 0 1 fX 0 2 s fX 22 0 8 s 0 0 0 0 0 0 PCC1...

Page 87: ...or ceramic oscillation b External clock VSS0 VSS1 X1 X2 Crystal or Ceramic Resonator External Clock X1 X2 Caution When using the system clock oscillator circuit to avoid influence of wiring capacity e...

Page 88: ...GENERATION CIRCUIT User s Manual U11919EJ3V0UM00 88 Figure 5 4 Incorrect Examples of Resonator Connection 1 2 a Too long wiring b Crossed signal line VSS0 VSS1 X1 X2 PORTn n 0 to 5 VSS0 VSS1 X1 X2 www...

Page 89: ...d Current flowing through ground line of oscillation circuit potential at points A B and C fluctuates VSS0 VSS1 X1 X2 High Current VSS0 VSS1 X1 X2 Pmn VDD A B C High Current e Signal is extracted VSS...

Page 90: ...C as follows a The slow mode 2 fCPU 1 6 s at 5 0 MHz operation of the system clock is selected when the RESET signal is generated PCC 02H While a low level is input to the RESET pin oscillation of the...

Page 91: ...the CPU clock before switching 5 6 2 Switching CPU clock The following figure illustrates how the CPU clock switches Figure 5 5 Switching CPU Clock VDD RESET CPU Clock Slow Operation High Speed Opera...

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Page 93: ...t Timer output Count value capture 1 Timer interrupt An interrupt is generated when a count value and compare value matches 2 Timer output Timer output control is possible when a count value and compa...

Page 94: ...l register 16 bit timer mode control register 20 TMC20 Port mode register 5 PM5 Figure 6 1 Block Diagram of 16 Bit Timer 20 CPT2 P32 INTP2 Internal Bus Internal Bus 16 Bit Timer Mode Control Register...

Page 95: ...nput clears this register to 0000H and after that to be in free running Cautions 1 The count value after releasing stop becomes undefined because the count operation is executed during the oscillation...

Page 96: ...it timer 20 16 bit timer mode control register 20 TMC20 Port mode register 5 PM5 1 16 bit timer mode control register 20 TMC20 16 bit timer mode control register 20 TMC20 controls the setting of a cou...

Page 97: ...TCL200 0 1 fX 22 1 25 MHz fX 26 78 1 kHz 16 bit Timer 20 Output Control Output disabled port mode Output enabled 16 bit Timer Counter 20 Count Clock Selection Overflow Flag Set Clear by reset and sof...

Page 98: ...set the output latch of PM51 and P51 to 0 PM5 is set with a 1 bit or 8 bit memory manipulation instruction RESET input sets PM5 to FFH Figure 6 3 Port Mode Register 5 Format 1 1 1 1 PM53 PM52 PM51 PM5...

Page 99: ...and CPT200 flags capture edge becomes setting prohibited When the count value of 16 bit timer counter 20 TM20 coincides with the value set to CR20 counting of TM20 continues and an interrupt request...

Page 100: ...100 Figure 6 5 Timer Interrupt Operation Timing Count Clock TM20 Count Value CR20 INTTM2 TO20 TOF20 0000H 0001H N FFFFH 0000H 0001H N FFFFH N N N N N Interrupt Accepted Interrupt Accepted Overflow Fl...

Page 101: ...TMC20 TO20 Output Enable Setting of Count Clock see Table 6 2 Inverse Enable of Timer Output Data Caution If both CPT201 flag and CPT200 flag are set to 0 the capture edge becomes operation prohibite...

Page 102: ...tains the count value of 16 bit timer counter 20 TCP20 fetches count value within 2 clocks and retains the count value until the next capture edge detection Table 6 3 and Figure 6 9 show the setting c...

Page 103: ...H and starts freerunning Figure 6 10 shows the timing of 16 bit timer counter 20 readout Cautions 1 The count value after releasing stop becomes undefined because the count operation is executed durin...

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Page 105: ...ution 1 fX 200 ns 2 8 fX 51 2 s 1 fX 200 ns 2 5 fX 6 4 s 2 13 fX 1 64 ms 2 5 fX 6 4 s Remarks 1 fX System clock oscillation frequency 2 The parenthesized values apply to operation at fX 5 0 MHz 2 Exte...

Page 106: ...Counter 00 TM00 2 Internal Bus TCE00 TCL001 TCL000 TOE00 8 Bit Timer Mode Control Register 1 F F P50 Output Latch PM50 Selector 1 8 bit compare register 00 CR00 This is an 8 bit register to compare th...

Page 107: ...T input clears TMC00 to 00H Figure 7 2 8 Bit Timer Mode Control Register 00 Format TCE00 0 0 0 0 TCL001 TCL000 TOE00 TMC00 Symbol Address After Reset R W FF53H 00H R W 6 7 5 4 3 2 1 0 TCL001 0 0 1 1 8...

Page 108: ...tput set PM50 and the output latch of P50 to 0 PM5 is set with a 1 bit or 8 bit memory manipulation instruction RESET input sets PM5 to FFH Figure 7 3 Port Mode Register 5 Format PM50 0 1 1 1 1 1 PM53...

Page 109: ...4 shows interval time and Figure 7 4 shows the timing of interval timer operation Cautions 1 Before rewriting CR00 stop the timer operation If CR00 is rewritten while the timer operation is enabled t...

Page 110: ...erval Timer Operation Timing Clear Clear Interrupt Accepted Interrupt Accepted Count Start Interval Time Interval Time Interval Time Count Clock TM00 Count Value CR00 TCE00 INTTM0 TO0 N 01 00 N 01 00...

Page 111: ...0 coincides with the value set to CR00 the value of TM00 is cleared to 0 and TM00 continues counting At the same time an interrupt request signal INTTM0 is generated Figure 7 5 shows the timing of ext...

Page 112: ...a match occurred the TM00 value will be cleared to 0 then resume to count generating an interrupt request signal INTTM0 Setting 0 to the bit 7 in TMC00 that is TCE00 makes the square wave output clea...

Page 113: ...re 7 6 Square Wave Output Timing Clear Clear Interrupt Accepted Interrupt Accepted Count Start Count Clock TM00 Count Value CR00 TCE00 INTTM0 TO0Note N 01 00 N 01 00 N 00 01 N N N N Note The initial v...

Page 114: ...TM00 started asynchronously with the count pulse Figure 7 7 8 Bit Timer Counter 00 Start Timing Count Pulse TM00 Count Value Timer starts 00H 01H 02H 03H 04H 2 Setting of 8 bit compare register 8 bit...

Page 115: ...rtent loop is detected a non maskable interrupt or the RESET signal can be generated Table 8 1 Inadvertent Loop Detection Time of Watchdog Timer Inadvertent Loop Detection Time At fX 5 0 MHz 2 11 1 fX...

Page 116: ...r clock select register 2 TCL2 Watchdog timer mode register WDTM Figure 8 1 Block Diagram of Watchdog Timer Internal Bus Internal Bus Prescaler Selector Control Circuit fX 26 fX 28 fX 210 3 7 Bit Coun...

Page 117: ...ation instruction RESET input clears TCL2 to 00H Figure 8 2 Timer Clock Select Register 2 Format TCL22 0 0 1 1 0 0 0 0 0 TCL22 TCL21 TCL20 TCL2 R W R W 7 6 5 4 3 2 1 0 TCL21 0 1 0 1 fX 24 fX 26 fX 28...

Page 118: ...ode 1 overflow and non maskable interrupt occur Watchdog timer mode 2 overflow occurs and reset operation started 0 0 Notes 1 Once RUN has been set to 1 it cannot be cleared to 0 by software Therefore...

Page 119: ...to 1 the watchdog timer can be cleared and start counting If RUN is not set to 1 and the inadvertent loop detection time is exceeded the system is reset or a non maskable interrupt is generated by th...

Page 120: ...d and a maskable interrupt INTWDT can be generated The priority of INTWDT is set as the highest of all the maskable interrupts The interval timer continues operation in the HALT mode but stops in the...

Page 121: ...clock SCK0 and two for serial data SI0 SO0 The 3 wire serial I O mode supports simultaneous transmit and receive operation reducing data transfer processing time It is possible to switch the start bi...

Page 122: ...ion Control Circuit Receive Shift Register RXS00 Receive Control Circuit Asynchronous Serial Interface Status Register 00 ASIS00 Direction Control Circuit Asynchronous Serial Interface Mode Register 0...

Page 123: ...RXE00 f X ASCK SCK0 P20 1 2 1 2 CSIE00 RXE00 CSIE00 Internal Bus BRGC00 Write TXE00 CSCK00 RXE00 Transmit Clock Receive Clock Selector Clear Clear 3 Bit Counter Clear 3 Bit Counter Clear Stop Prescal...

Page 124: ...register is used to hold received data Each time one byte of data is received a new byte of data is transferred from receive shift register 00 RXS00 If the data length is specified as 7 bits receive d...

Page 125: ...interface 00 in the 3 wire serial I O mode CSIM00 is set with a 1 bit or 8 bit memory manipulation instruction RESET input clears CSIM00 to 00H Figure 9 3 Serial Operation Mode Register 00 Format CSI...

Page 126: ...W FF70H 00H R W 7 6 5 4 3 2 1 0 Transmit operation stop Transmit operation enable Receive operation stop Receive operation enable RXE00 0 1 0 1 0 0 0 1 0 1 1 1 No parity Always add 0 parity at transmi...

Page 127: ...ck SCK0 output 0 1 External clock SCK0 input 0 0 1 1 1 1Note 2 Note 2 0 1 0 1 LSB Internal clock SI0 Note 2 SO0 CMOS output SCK0 output Other than above Setting prohibited 3 Asynchronous serial interf...

Page 128: ...0 Parity error not generated Parity error generated when the parity of transmit data does not coincide Flaming error not generated Flaming error generated when stop bit is not detected Note 1 Overrun...

Page 129: ...1 0 n 1 2 3 4 5 6 7 8 Setting prohibited Symbol Address After Reset 3 Bit Counter Source Clock Selection Input clock from external to ASCK pinNote Other than above Note Only used in UART mode Caution...

Page 130: ...rate generated from the system clock is found from the following expression Baud rate Hz fX System clock oscillation frequency n Value determined by values of TPS000 through TPS003 as shown in Figure...

Page 131: ...baud rate generated from the clock input from the ASCK pin is found from the following expression Baud rate Hz fASCK Frequency of clock input to the ASCK pin Table 9 4 Relationship between ASCK Pin I...

Page 132: ...TxD and P22 SI0 RxD pins can be used as normal I O ports 1 Register setting Operation stop mode is set by serial operation mode register 00 CSIM00 and asynchronous serial interface mode register 00 AS...

Page 133: ...truction RESET input clears ASIM00 to 00H TXE00 0 1 Transmit Operation Control TXE00 RXE00 PS001 PS000 CL00 SL00 0 0 ASIM00 Symbol Address After Reset R W FF70H 00H R W 7 6 5 4 3 2 1 0 Transmit operat...

Page 134: ...by serial operation mode register 00 CSIM00 asynchronous serial interface mode register 00 ASIM00 asynchronous serial interface status register 00 ASIS00 and baud rate generator control register 00 BR...

Page 135: ...Transmit operation enable Receive operation stop Receive operation enable RXE00 0 1 0 1 0 0 0 1 0 1 1 1 No parity Always add 0 parity at transmission Parity check is not performed at reception No par...

Page 136: ...nerated Framing error generated when stop bit is not detected Note 1 Overrun error not generated Overrun error generatedNote 2 when the next receive operation is completed before the data is read from...

Page 137: ...rformed normally Be sure not to write to BRGC00 during communication operation 2 Be sure not to select n 1 during an operation at fX 5 0 MHz because n 1 exceeds the baud rate limit 3 When selecting an...

Page 138: ...f baud rate transmit receive clock by means of external clock from ASCK pin The transmit receive clock is generated by scaling the clock input from the ASCK pin The baud rate generated from the clock...

Page 139: ...1 D2 D3 D4 D5 D6 D7 Parity Bit Stop Bit Start Bit One Data Frame Start bit 1 bit Character bits 7 bits 8 bits Parity bit Even parity odd parity 0 parity no parity Stop bit s 1 bit 2 bits When 7 bits a...

Page 140: ...ed and if the number is odd a parity error is generated ii Odd parity At transmission Conversely to the even parity the parity bit is determined so that the number of bits with a value of 1 in the tra...

Page 141: ...mission Completion Interrupt Timing a Stop bit length 1 STOP Parity D7 D6 D2 D1 D0 START TxD Output INTST b Stop bit length 2 STOP Parity D7 D6 D2 D1 D0 START TxD Output INTST Caution Do not rewrite t...

Page 142: ...the start bit reception of one frame of data ends When one frame of data has been received the receive data in the shift register is transferred to receive buffer register 00 RXB00 and a reception co...

Page 143: ...eive Error Causes Receive Error Cause Parity error Transmission time parity specification and reception data parity do not match Framing error Stop bit not detected Overrun error Reception of next dat...

Page 144: ...6 RXE00 of asynchronous serial interface mode register 00 ASIM00 is cleared during reception receive buffer register 00 RXB00 and receive completion interrupt INTSR are as follows Parity RxD Pin RXB00...

Page 145: ...mode register 00 CSIM00 asynchronous serial interface mode register 00 ASIM00 and baud rate generator control register 00 BRGC00 a Serial operation mode register 00 CSIM00 CSIM00 is set with a 1 bit...

Page 146: ...5 4 3 2 1 0 Transmit operation stop Transmit operation enable Receive operation stop Receive operation enable RXE00 0 1 0 1 0 0 0 1 0 1 1 1 No parity Always add 0 parity at transmission Parity check...

Page 147: ...munications cannot be performed normally Be sure not to write to BRGC00 during communication operation 2 Be sure not to select n 1 during an operation at fX 5 0 MHz because n 1 exceeds the baud rate l...

Page 148: ...operations of TXS00 SIO00 and RXS00 stop automatically and the interrupt request signal INTCSI0 is generated Figure 9 11 3 Wire Serial I O Mode Timing 1 2 3 4 5 6 7 8 DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 D...

Page 149: ...he non maskable interrupt has one source of interrupt from the watchdog timer 2 Maskable interrupt These interrupts undergo mask control If two or more interrupts are simultaneously generated each int...

Page 150: ...on External 000AH C INTSR End of serial interface 00 UART reception 4 INTCSI0 End of serial interface 00 3 wire transfer 000CH 5 INTST End of serial interface 00 UART transmission 000EH 6 INTTM0 Gener...

Page 151: ...Internal maskable interrupt MK IF IE Internal Bus Interrupt Request Vector Table Address Generator Standby Release Signal C External maskable interrupt MK IF IE Internal Bus INTM0 KRM00 Interrupt Requ...

Page 152: ...rogram status word PSW Key return mode register 00 KRM00 Table 10 2 gives a listing of interrupt request flag and interrupt mask flag names corresponding to interrupt requests Table 10 2 Flags Corresp...

Page 153: ...s 1 to 6 of IF1 to 0 2 TMIF4 flag is R W enabled only when a watchdog timer is used as an interval timer If the watchdog timer mode 1 or 2 is used set TMIF4 flag to 0 3 Because port 3 has an alternate...

Page 154: ...ter Reset Interrupt Servicing Control Interrupt servicing enabled Interrupt servicing disabled MK 6 5 4 3 2 1 7 0 TMMK20 1 1 1 1 1 1 KRMK00 MK1 FFE5H FFH R W 6 5 4 3 2 1 7 0 Cautions 1 Be sure to set...

Page 155: ...s After Reset INTP0 Valid Edge Selection Falling edge Rising edge Setting prohibited Both rising and falling edges INTP1 Valid Edge Selection Falling edge Rising edge Setting prohibited Both rising an...

Page 156: ...rry out operations with a bit manipulation instruction and dedicated instructions EI and DI When a vectored interrupt request is acknowledged PSW is automatically saved into a stack and the IE flag is...

Page 157: ...KRM005 KRM004 0 0 0 KRM000 KRM00 Symbol Address After Reset R W FFF5H 00H R W 7 6 5 4 3 2 1 0 Cautions 1 Be sure to set bits 1 to 3 to 0 2 When KRM00 is set to 1 the corresponding pin is connected to...

Page 158: ...ack in that order the IE flag is reset to 0 the contents of the vector table are loaded to the PC and then program execution branches Figure 10 8 shows the flowchart from non maskable interrupt reques...

Page 159: ...DT overflows No Yes Reset Processing No Yes Yes Interrupt request is generated Interrupt processing is started WDTM3 0 non maskable interrupt is selected WDTM Watchdog timer mode register WDT Watchdog...

Page 160: ...UNCTIONS User s Manual U11919EJ3V0UM00 160 Figure 10 10 Accepting Non Maskable Interrupt Request Second Interrupt Processing First Interrupt Processing NMI Request second NMI Request first Main Routin...

Page 161: ...essing Minimum Time Maximum Time Note 9 clocks 19 clocks Note The wait time is maximum when an interrupt request is generated immediately before BT and BF instruction Remark 1 clock fCPU CPU clock Whe...

Page 162: ...ram Algorithm Start IF 1 MK 0 IE 1 Vectored Interrupt Processing Yes Interrupt request generated Yes Yes No No No Interrupt Request Pending Interrupt Request Pending IF Interrupt request flag MK Inter...

Page 163: ...ion Execution Saving PSW and PC jump to interrupt processing 8 Clocks Interrupt Processing Program Clock CPU Interrupt NOP MOV A r If an interrupt request flag IF is set at the last clock of the instr...

Page 164: ...uest acceptance and the interrupt request acceptance enable state is set Example 2 A nesting is not generated because interrupts are not enabled INTyy EI Main Processing RETI INTyy Processing INTxx Pr...

Page 165: ...next instruction even if the interrupt request maskable interrupt non maskable interrupt and external interrupt is generated during the execution The following shows such instructions interrupt reque...

Page 166: ...User s Manual U11919EJ3V0UM00 166 MEMO www DataSheet4U com...

Page 167: ...the entire system The current drain of the CPU can be substantially reduced in this mode Data memory can be retained at low voltages VDD 1 8 V min Therefore this mode is useful for retaining the conte...

Page 168: ...tling Time Select Register Format OSTS2 0 0 1 0 0 0 0 0 OSTS2 OSTS1 OSTS0 OSTS R W FFFAH 04H R W 7 6 5 4 3 2 1 0 OSTS1 0 1 0 212 fX 215 fX 217 fX 819 s 6 55 ms 26 2 ms OSTS0 0 0 0 Setting prohibited S...

Page 169: ...ing Status Item HALT Mode Operating Status Clock generation circuit System clock oscillation enabled Clock supply to CPU stopped CPU Operation stopped Port Output latch Retains the status before setti...

Page 170: ...uted Figure 11 2 Releasing HALT Mode by Interrupt HALT Instruction Standby Release Signal Wait Wait HALT Mode Operation Mode Operation Mode Clock Oscillation Remarks 1 The broken line indicates the ca...

Page 171: ...ms Reset Period HALT Mode Operation Mode Oscillation Settling Wait Status Clock Operation Mode Oscillation Stop Oscillation Oscillation Remarks 1 fX System clock oscillation frequency 2 The parenthesi...

Page 172: ...by the oscillation settling time select register OSTS elapses and then operation mode is set The operation status in the STOP mode is shown in the following table Table 11 3 STOP Mode Operating Status...

Page 173: ...upt processing is performed after the oscillation settling time has elapsed If the interrupt acceptance is disabled the instruction at the next address is executed Figure 11 4 Releasing STOP Mode by I...

Page 174: ...6 55 ms STOP Mode Operation Mode Oscillation Settling Wait Status Clock Operation Mode Oscillation Stop Oscillation Oscillation Reset Period Remarks 1 fX System clock oscillation frequency 2 The pare...

Page 175: ...uring oscillation settling time just after reset clear When a high level is input to the RESET pin the reset is cleared and program execution is started after the oscillation settling time 215 fX has...

Page 176: ...ow in Watchdog Timer X1 Internal Reset Signal Port Pin Overflow in Watchdog Timer Normal Operation Reset Period oscillation continues Oscillation Settling Time Wait Normal Operation reset processing H...

Page 177: ...ned Timer counter TM00 00H Compare register CR00 00H 8 bit timer event counter Mode control register TMC00 00H Timer clock select register TCL2 00H Watchdog timer Mode register WDTM 00H Mode register...

Page 178: ...User s Manual U11919EJ3V0UM00 178 MEMO www DataSheet4U com...

Page 179: ...ytes flash memory 4 Kbytes 8 Kbytes 12 Kbytes 16 Kbytes Internal memory Internal high speed RAM 512 bytes 256 bytes 512 bytes IC pin Not provided Provided VPP pin Provided Not provided Electric charac...

Page 180: ...Table 13 2 To select a communication mode the format shown in Figure 13 1 is used Each communication mode is selected depending on the number of VPP pulses shown in Table 13 2 Table 13 2 Communication...

Page 181: ...rased status of entire memory Data write Writes data to flash memory starting from write start address and based on number of data bytes to be written Batch verify Compares all contents of memory with...

Page 182: ...026A VPPnNote VDD RESET SO SI GND VPP VDD0 VDD1 RESET RxD TxD VSS0 VSS1 Note n 1 2 Figure 13 4 Connection Example of Flashpro III in Pseudo 3 Wire Mode When using P0 VPPnNote VDD RESET SCK SO SI GND V...

Page 183: ...MHz 0 COMM PORT UART ch0 CPU CLK On Target Board On Target Board 4 1943 MHz UART UART BPS 9 600 bps Note 2 8 COMM PORT Port A On Target Board CPU CLK In Flashpro On Target Board 4 1943 MHz SIO CLK 1 0...

Page 184: ...User s Manual U11919EJ3V0UM00 184 MEMO www DataSheet4U com...

Page 185: ...ecification Indirect address specification In the case of immediate data write an appropriate numeric value or a label When using a label be sure to write the and symbols For operand register identifi...

Page 186: ...xiliary carry flag Z Zero flag IE Interrupt request enable flag NMIS Flag indicating non maskable interrupt servicing in progress Memory contents indicated by address or register contents in parenthes...

Page 187: ...sfr A A addr16 3 8 A addr16 addr16 A 3 8 addr16 A PSW byte 3 6 PSW byte A PSW 2 4 A PSW PSW A 2 4 PSW A A DE 1 6 A DE DE A 1 6 DE A A HL 1 6 A HL HL A 1 6 HL A A HL byte 2 6 A HL byte MOV HL byte A 2...

Page 188: ...6 A CY A HL ADD A HL byte 2 6 A CY A HL byte A byte 2 4 A CY A byte CY saddr byte 3 6 saddr CY saddr byte CY A r 2 4 A CY A r CY A saddr 2 4 A CY A saddr CY A addr16 3 8 A CY A addr16 CY A HL 1 6 A C...

Page 189: ...r byte A r 2 4 A A r A saddr 2 4 A A saddr A addr16 3 8 A A addr16 A HL 1 6 A A HL AND A HL byte 2 6 A A HL byte A byte 2 4 A A byte saddr byte 3 6 saddr saddr byte A r 2 4 A A r A saddr 2 4 A A saddr...

Page 190: ...4 saddr saddr 1 INCW rp 1 4 rp rp 1 DECW rp 1 4 rp rp 1 ROR A 1 1 2 CY A7 A0 Am 1 Am 1 ROL A 1 1 2 CY A0 A7 Am 1 Am 1 RORC A 1 1 2 CY A0 A7 CY Am 1 Am 1 ROLC A 1 1 2 CY A7 A0 CY Am 1 Am 1 saddr bit 3...

Page 191: ...6 PC PC 2 jdisp8 if Z 1 BNZ saddr16 2 6 PC PC 2 jdisp8 if Z 0 saddr bit addr16 4 10 PC PC 4 jdisp8 if saddr bit 1 sfr bit addr16 4 10 PC PC 4 jdisp8 if sfr bit 1 A bit addr16 3 8 PC PC 3 jdisp8 if A...

Page 192: ...1 None A ADD ADDC SUB SUBC AND OR XOR CMP MOVNote XCH Note ADD ADDC SUB SUBC AND OR XOR CMP MOV XCH MOV XCH ADD ADDC SUB SUBC AND OR XOR CMP MOV ADD ADDC SUB SUBC AND OR XOR CMP MOV MOV XCH MOV XCH AD...

Page 193: ...SP None AX ADDW SUBW CMPW MOVW XCHW MOVW MOVW rp MOVW MOVW Note INCW DECW PUSH POP saddrp MOVW SP MOVW Note Only when rp BC DE or HL 3 Bit manipulation instructions SET1 CLR1 NOT1 BT BF 2nd Operand 1...

Page 194: ...ll instructions branch instructions CALL CALLT BR BC BNC BZ BNZ DBNZ 2nd Operand 1st Operand AX addr16 addr5 addr16 Basic instructions BR CALL BR CALLT BR BC BNC BZ BNZ Compound instructions DBNZ 5 Ot...

Page 195: ...ompatibility with PC98 NX series Unless stated otherwise products which are supported for the IBM PC ATTM compatibles can also be used with the PC98 NX series When using the PC98 NX series therefore r...

Page 196: ...package C compiler package System simulator Device file C compiler source file Integrated debugger Flash Memory Writing Environment In Circuit Emulator Emulation Probe Emulation board Flash writer Fl...

Page 197: ...bler package CC78K0S C compiler package Part number S CC78K0S File containing the information inherent to the device Used in combination with other optional tools RA78K0S CC78K0S SM78K0S DF789026 Note...

Page 198: ...B 8ES Flash memory writing adapter Flash memory writing adapter Used in connection with Flashpro III FA 42CU For 42 pin plastic shrink DIP CU type FA 44GB For 44 pin plastic QFP GB 3BS type FA 44GB 8E...

Page 199: ...89026 NS EM1 Emulation board Emulation board for emulating the peripheral hardware inherent to the device Used in combination with in circuit emulator NP 44GB Note Emulation probe Emulation probe for...

Page 200: ...stem to be used S ID78K0S NS Host Machine OS Supply Media AA13 PC 9800 series Japanese Windows Note 3 5 2HD FD AB13 IBM PC AT compatibles Japanese Windows Note 3 5 2HC FD Note Also operates under the...

Page 201: ...44 B C M N O L K R Q I H P J G EV 9200G 44 G0 ITEM MILLIMETERS INCHES A B C D E F G H I J K L M O N P Q R 15 0 10 3 10 3 15 0 4 C 3 0 0 8 5 0 12 0 14 7 5 0 12 0 14 7 8 0 7 8 2 0 1 35 0 35 0 1 1 5 0 59...

Page 202: ...57 0 03 0 618 0 433 0 433 0 618 0 197 0 197 0 02 0 062 0 087 0 062 0 8 0 02 10 8 0 0 05 0 8 0 02 10 8 0 0 05 0 002 0 001 0 002 0 002 0 002 0 001 0 002 0 002 0 003 0 004 0 003 0 004 0 001 0 002 0 001...

Page 203: ...D H C 2 0 C 0 079 I 9 35 0 368 J 1 325 0 052 E 8 4 0 331 F 10 8 0 425 K 1 325 0 052 L 12 0 0 472 M Q 1 8 0 071 R S N 8 5 0 335 O 13 15 P 5 0 0 197 0 518 W X 6 0 0 236 Y T U 16 95 V 7 35 0 289 0 667 Z...

Page 204: ...User s Manual U11919EJ3V0UM00 204 MEMO www DataSheet4U com...

Page 205: ...OS controls task execution order and performs the switching process to a task to be executed Caution when used under the PC environment The MX78K0S is a DOS based application Use this software in the...

Page 206: ...User s Manual U11919EJ3V0UM00 206 MEMO www DataSheet4U com...

Page 207: ...146 Asynchronous serial interface status register 00 ASIS00 128 136 B Baud rate generator control register 00 BRGC00 129 137 147 E External interrupt mode register 0 INTM0 155 I Interrupt mask flag re...

Page 208: ...Processor clock control register PCC 86 Pull up resistor option register PUO 82 R Receive buffer register 00 RXB00 124 Receive shift register 00 RXS00 124 S Serial operation mode register 00 CSIM00 12...

Page 209: ...uest flag register 1 153 INTM0 External interrupt mode register 0 155 K KRM00 Key return mode register 00 157 M MK0 Interrupt mask flag register 0 154 MK1 Interrupt mask flag register 1 154 O OSTS Osc...

Page 210: ...117 TCP20 16 bit capture register 20 95 TM00 8 bit timer counter 00 106 TM20 16 bit timer counter 20 95 TMC00 8 bit timer mode control register 00 107 TMC20 16 bit timer mode control register 20 96 T...

Page 211: ...Chapter 9 Serial Interface 00 Change of flag names of interrupt request flag register Change of flag names of interrupt mask flag register Change of symbols and flag names of key return mode register...

Page 212: ...User s Manual U11919EJ3V0UM00 212 MEMO www DataSheet4U com...

Page 213: ...51 Address North America NEC Electronics Inc Corporate Communications Dept Fax 1 800 729 9288 1 408 588 6130 Europe NEC Electronics Europe GmbH Technical Documentation Dept Fax 49 211 6503 274 South A...

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