Abov MC97F2664, Руководство пользователя

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MC97F2664
254 April 11, 2014 Ver. 1.4
The Byte Write program procedure in user program mode
1. Page buffer clear (FMCR=0x01)
2. Write data to page buffer
3. Set flash sector address register (FSADRH/FSADRM/FSADRL).
4. Set flash identification register (FIDR).
5. Set flash mode control register (FMCR).
6. Write verify
NOTE) Data of the address should be
“00H” before writing data to an address
Program Tip
–
byte write
MOV FMCR,#0x01 ;page buffer clear
NOP ;Dummy instruction, This instruction must be needed.
NOP ;Dummy instruction, This instruction must be needed.
NOP ;Dummy instruction, This instruction must be needed.
MOV
A,#5
MOV DPH,#0x80
MOV DPL,#0
MOVX @DPTR,A ;Write data to page buffer
MOV
A,#6
MOV DPH,#0x80
MOV DPL,#0x05
MOVX @DPTR,A ;Write data to page buffer
MOV FSADRH,#0x00
MOV FSADRM,#0x7F
MOV FSADRL,#0x40 ;Select sector 509
MOV FIDR,#0xA5 ;Identification value
MOV FMCR,#0x03 ;Start flash write mode
NOP ;Dummy instruction, This instruction must be needed.
NOP ;Dummy instruction, This instruction must be needed.
NOP ;Dummy instruction, This instruction must be needed.
MOV A,#0 ;write verify
MOV R1,#5
MOV DPH,#0x7F
MOV DPL,#0x40
MOVC A,@A+DPTR
SUBB A,R1 ;0x7F40 = 5 ?
JNZ Verify_error
MOV A,#0
MOV R1,#6
MOV DPH,#0x7F
MOV DPL,#0x45
MOVC A,@A+DPTR
SUBB A,R1 ;0x7F45 = 6 ?
JNZ Verify_error
Verify_error: