NEC mPD789026 Subseries User Manual Download Page 162

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CHAPTER 10 INTERRUPT FUNCTIONS

User's Manual U11919EJ3V0UM00

162

Figure 10-11. Interrupt Request Acceptance Program Algorithm

Start

××

IF = 1 ?

××

MK = 0 ?

IE = 1 ?

Vectored Interrupt

Processing

Yes (Interrupt request generated)

Yes

Interrupt Request Pending

××

: Interrupt request flag

××

MK : Interrupt mask flag

: Flag to control maskable interrupt request acceptance (1 = enable, 0 = disable)

Summary of Contents for mPD789026 Subseries

Page 1: ...al PD789022 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...

Page 2: ...User s Manual U11919EJ3V0UM00 2 MEMO...

Page 3: ...6 16 BIT 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...

Page 4: ...g a pull up 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...

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

Page 6: ...f unused pins 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 Sect...

Page 7: ...ronics Germany 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...

Page 8: ...User s Manual U11919EJ3V0UM00 8 MEMO...

Page 9: ...struction 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 unders...

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

Page 11: ...Device C11531E C11531J NEC Semiconductor Device Reliability Quality Control System C10983E C10983J Guide to Prevent Damage for Semiconductor Devices by Electrostatic Discharge ESD C11892E C11892J Semi...

Page 12: ...User s Manual U11919EJ3V0UM00 12 MEMO...

Page 13: ...40 to P47 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...

Page 14: ...n of Port 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 Circ...

Page 15: ...Watchdog 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 Configur...

Page 16: ...185 14 1 Operation 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 Lis...

Page 17: ...to be Saved 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 P...

Page 18: ...Operation 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 Watch...

Page 19: ...on Execution 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 Relea...

Page 20: ...of 8 Bit 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 Count...

Page 21: ...de Operating 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 Differ...

Page 22: ...User s Manual U11919EJ3V0UM00 22 MEMO...

Page 23: ...uction execution 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 Ti...

Page 24: ...ink DIP 600 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 pl...

Page 25: ...P51 TO2 P50 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...

Page 26: ...GB 8ES 1 2 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...

Page 27: ...al Clock INTP0 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 T...

Page 28: ...789026 44 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 PD...

Page 29: ...4 ch PD789146 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...

Page 30: ...1 SERIAL INTERFACE 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 WAT...

Page 31: ...hdog timer 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...

Page 32: ...User s Manual U11919EJ3V0UM00 32 MEMO...

Page 33: ...ts When used 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 outp...

Page 34: ...data input Input 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 IN...

Page 35: ...to input 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 funct...

Page 36: ...s as the external 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...

Page 37: ...mer input 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...

Page 38: ...the normal 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...

Page 39: ...g of Unused 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 CPT...

Page 40: ...of Pin Input 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...

Page 41: ...5 show the 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 Fu...

Page 42: ...FF00H FEFFH 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 bit...

Page 43: ...F00H FEFFH 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...

Page 44: ...F00H FEFFH 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...

Page 45: ...H FEFFH 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 Re...

Page 46: ...to the internal 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 branchi...

Page 47: ...llowing capacity 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 PD...

Page 48: ...meet the functions 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 o...

Page 49: ...D789024 FFFFH 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...

Page 50: ...D789025 FFFFH 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 Shor...

Page 51: ...D789026 FFFFH 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 Shor...

Page 52: ...026A FFFFH 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 S...

Page 53: ...bytes of 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...

Page 54: ...ce This flag 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...

Page 55: ...tents undefined 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 SP1...

Page 56: ...8 bit registers 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 Fi...

Page 57: ...operand sfr 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 addre...

Page 58: ...M0 FF21H Port 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 TC...

Page 59: ...t flag register 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 INT...

Page 60: ...3 1 Relative 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...

Page 61: ...word is transferred 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...

Page 62: ...5 instruction is 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 Ta...

Page 63: ...ing instruction 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...

Page 64: ...pare register 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 i...

Page 65: ...This addressing 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 Identifie...

Page 66: ...ormat is executed 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...

Page 67: ...be accessed 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 Exa...

Page 68: ...he memory spaces 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...

Page 69: ...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 Chapt...

Page 70: ...n used 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 Por...

Page 71: ...ort with output 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 c...

Page 72: ...ut port pins 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 por...

Page 73: ...d as the data 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 th...

Page 74: ...00 74 Figure 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 r...

Page 75: ...00 75 Figure 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 r...

Page 76: ...by using the 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...

Page 77: ...used as the 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...

Page 78: ...cted in 4 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...

Page 79: ...M00 79 Figure 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 reg...

Page 80: ...0UM00 80 Figure 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 regi...

Page 81: ...input when 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...

Page 82: ...r 8 bit memory 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 Inp...

Page 83: ...of the pin 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...

Page 84: ...User s Manual U11919EJ3V0UM00 84 MEMO...

Page 85: ...by executing 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 Ite...

Page 86: ...s set with 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...

Page 87: ...a Crystal 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...

Page 88: ...R 5 CLOCK 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...

Page 89: ...ng current 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 ext...

Page 90: ...egister PCC 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 oscillat...

Page 91: ...on time of 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 S...

Page 92: ...User s Manual U11919EJ3V0UM00 92 MEMO...

Page 93: ...r interrupt 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...

Page 94: ...O20 Control 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...

Page 95: ...ut RESET input 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 o...

Page 96: ...ntrol 16 bit 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 settin...

Page 97: ...TCL201 0 0 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 res...

Page 98: ...er output 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 PM5...

Page 99: ...to CPT201 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 interrup...

Page 100: ...9EJ3V0UM00 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 O...

Page 101: ...L200 TOE20 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...

Page 102: ...hes and retains 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...

Page 103: ...20 to 0000H 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 exec...

Page 104: ...User s Manual U11919EJ3V0UM00 104 MEMO...

Page 105: ...Time Resolution 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...

Page 106: ...Bit Timer 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...

Page 107: ...ction RESET 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...

Page 108: ...r timer output 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...

Page 109: ...ed Table 7 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...

Page 110: ...re 7 4 Interval 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 0...

Page 111: ...lue of TM00 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 tim...

Page 112: ...As soon as 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 o...

Page 113: ...0 113 Figure 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...

Page 114: ...ounter 00 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 regis...

Page 115: ...an inadvertent 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...

Page 116: ...ister Timer 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...

Page 117: ...ry manipulation 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...

Page 118: ...og timer mode 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...

Page 119: ...etting RUN 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 gener...

Page 120: ...K4 is valid 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 sto...

Page 121: ...for serial 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 th...

Page 122: ...O00 Direction Control Circuit Receive Shift Register RXS00 Receive Control Circuit Asynchronous Serial Interface Status Register 00 ASIS00 Direction Control Circuit Asynchronous Serial Interface Mode...

Page 123: ...IE00 TXE00 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 St...

Page 124: ...XB00 This 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...

Page 125: ...ing serial 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...

Page 126: ...r Reset R 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...

Page 127: ...ternal clock 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 ser...

Page 128: ...5 4 3 2 1 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...

Page 129: ...0 1 0 1 0 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 mo...

Page 130: ...The baud 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...

Page 131: ...CK pin The 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...

Page 132: ...K P21 SO0 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 regi...

Page 133: ...lation instruction 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 Trans...

Page 134: ...de is set 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 regi...

Page 135: ...ation 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 is not performed at recept...

Page 136: ...ror not generated 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...

Page 137: ...nnot 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 limit 3 When se...

Page 138: ...neration of 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...

Page 139: ...ormat D0 D1 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 Whe...

Page 140: ...t is counted 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...

Page 141: ...face Transmission 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...

Page 142: ...cted after 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 re...

Page 143: ...le 9 7 Receive 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 o...

Page 144: ...When bit 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...

Page 145: ...operation 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 wit...

Page 146: ...0H 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 transmission Par...

Page 147: ...ed and communications 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 b...

Page 148: ...nsfer the 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...

Page 149: ...enerated The 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 generate...

Page 150: ...ge detection 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 IN...

Page 151: ...Signal B 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 Inte...

Page 152: ...0 INTM0 Program 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 Fla...

Page 153: ...F0 and bits 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...

Page 154: ...Address After 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 su...

Page 155: ...bol Address 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...

Page 156: ...ter can carry 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...

Page 157: ...007 KRM006 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 co...

Page 158: ...to the stack 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 interr...

Page 159: ...Timer No WDT 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 WD...

Page 160: ...NTERRUPT FUNCTIONS 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 M...

Page 161: ...st to Processing 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...

Page 162: ...tance Program 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 fla...

Page 163: ...g Instruction 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...

Page 164: ...errupt request 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 Processin...

Page 165: ...ion of the 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 inter...

Page 166: ...User s Manual U11919EJ3V0UM00 166 MEMO...

Page 167: ...and stops 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...

Page 168: ...lation Settling 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 pr...

Page 169: ...ode Operating 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 be...

Page 170: ...ss is executed 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 indica...

Page 171: ...5 fX 6 55 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...

Page 172: ...time set 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 Operat...

Page 173: ...red interrupt 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...

Page 174: ...ait 215 fX 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...

Page 175: ...input or during 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 2...

Page 176: ...by Overflow 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 pr...

Page 177: ...P20 Undefined 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...

Page 178: ...User s Manual U11919EJ3V0UM00 178 MEMO...

Page 179: ...ROM 16 Kbytes 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 Elect...

Page 180: ...listed in 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 Com...

Page 181: ...k Checks erased 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 m...

Page 182: ...III PD78F9026A 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 S...

Page 183: ...O CLK 1 0 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 S...

Page 184: ...User s Manual U11919EJ3V0UM00 184 MEMO...

Page 185: ...address specification 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 registe...

Page 186: ...flag AC Auxiliary 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...

Page 187: ...sfr A 2 4 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 H...

Page 188: ...r16 A HL 1 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...

Page 189: ...saddr saddr 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...

Page 190: ...C saddr 2 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 sa...

Page 191: ...saddr16 2 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 jd...

Page 192: ...te addr16 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...

Page 193: ...ote saddrp 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...

Page 194: ...0 194 4 Call 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...

Page 195: ...nt tools Compatibility 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 t...

Page 196: ...Assembler 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...

Page 197: ...the assembler 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 DF7...

Page 198: ...4GB FA 44GB 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...

Page 199: ...0S NS IE 789026 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...

Page 200: ...erating system 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...

Page 201: ...EV 9200G 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...

Page 202: ...2 2 0 1 1 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...

Page 203: ...0 12 0 398 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 2...

Page 204: ...User s Manual U11919EJ3V0UM00 204 MEMO...

Page 205: ...he MX78K0S 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 softw...

Page 206: ...User s Manual U11919EJ3V0UM00 206 MEMO...

Page 207: ...6 133 135 146 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 ma...

Page 208: ...81 98 108 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...

Page 209: ...errupt request 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...

Page 210: ...register 2 117 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 regist...

Page 211: ...egister 00 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 mod...

Page 212: ...User s Manual U11919EJ3V0UM00 212 MEMO...

Page 213: ...02 2719 5951 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 2...

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