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21. Flash Memory
21.4 Toggle Bit (D6)
TMP89FM42
RA003
Note 1: In using a write instruction in the xxx bus write cycle, make sure that you use a write instruction of
more than three machine cycles or arrange write instructions in such a way that they are generated at
intervals of three or more machine cycles. If a 16-bit transfer instruction is used or if write instructions
are executed at intervals of two machine cycles, the flash memory command sequence will not be
transmitted properly, and a malfunction may occur.
Note 2: If a read of the flash memory (toggle operation) is to be performed after a write instruction is gener-
ated in the xth bus write cycle, instructions must be arranged in such a way that they are generated at
intervals of three or more machine cycles; machine cycles are counted from when the last xth bus
write cycle is generated to when each instruction is generated. Three NOP instructions are normally
used. If the interval between instructions is short, the toggle bit does not operation correctly.
sLOOP1:
LD
A,(IX)
; (steps 8,14)
CMP
A,(IX)
J
NZ,sLOOP1
; Loop until the read values become the same
LD
(FLSCR1),0x40
; Disable the execution of command sequence (steps 9 and
15)
LD
(FLSCR2),0xD5
; Reflect the FLSCR1 setting
RET
; Return to flash memory
; Address conversion process (steps 6 and 12)
sAddConv:
LD
WA,IX
SWAP
C
AND
C,0x10
SWAP
W
AND
W,0x08
OR
C,W
XOR
C,0x08
SHRC
C
OR
C,0xA0
LD
(FLSCR1),C
; Enable the execution of command sequence. Make the
FAREA setting.
LD
(FLSCR2),0xD5
; Reflect the FLSCR1 setting
LD
WA,IX
TEST
C.3
J
Z,sAddConvEnd
OR
W,0x80
LD
IX,WA
sAddConvEnd:
RET
; Interrupt subroutine
sINTWDT:
:
:
; Error processing
RETN
sINTSWI:
:
:
; Error processing
RETN
sRAMprogEnd:
NOP
Example: Case in which data is read from 0xF000 in the code area and stored at 0x98 in RAM
LD
(FLSCR1),0xA8
; Select AREA C1
LD
(FLSCR2),0xD5
; Reflect the FLSCR1 setting
LD
A,(0xF000)
; Read data from 0xF000
LD
(0x98),A
; Store data at 0x98
LD
(FLSCR1),0x40
; Select AREA D0
LD
(FLSCR2),0xD5
; Reflect the FLSCR1 setting
Содержание TLCS-870/C1 Series
Страница 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Страница 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Страница 4: ......
Страница 14: ......
Страница 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Страница 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Страница 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Страница 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Страница 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Страница 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Страница 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Страница 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Страница 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Страница 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Страница 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Страница 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Страница 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Страница 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Страница 336: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 Note 1 Make sure that you set the C register to 0x00 LD FLSCR2 0xD5 ...
Страница 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Страница 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Страница 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Страница 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Страница 406: ...26 Package Dimensions TMP89FM42 ...
Страница 408: ......