AN1827 Freescale Semiconductor / Motorola, AN1827 Datasheet - Page 45

• Manufacturer Part Number: AN1827
• Description: Programming and Erasing FLASH Memory on the MC68HC908AS60
• Manufacturer: Freescale Semiconductor / Motorola

AN1827
MOTOROLA
lda
lda
lda
sta
lda
sta
lda
sta
lda
sta
lda
sta
lda
sta
lda
sta
lda
sta
lda
jsr
lda
jsr
lda
jsr
lda
jsr
lda
jsr
lda
jsr
lda
jsr
lda
jsr
lda
cmp
bne
lda
cmp
bne
flbpr1
flbpr2
data
,x
data+1
1,x
data+2
2,x
data+3
3,x
data+4
4,x
data+5
5,x
data+6
6,x
data+7
7,x
#hven.
WriteFLCR
#tSTEP
Delay
#hven.
WriteFLCR
#tHVTV
Delay
#margin.
WriteFLCR
#tVTP
Delay
#pgm.
WriteFLCR
#tHVD
Delay
,x
data
Repeat
1,x
data+1
Repeat
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;Step 3 - Read from the block protect
; registers
;Step 4 - Copy the 8 bytes of data
; from the RAM buffer to the
; appropriate FLASH locations
;Step 5 - Set the HVEN bit
;Step 6 - Wait for time tSTEP
;Step 7 - Clear the HVEN bit
;Step 8 - Wait for time tHVTV
;Step 9 - Set the MARGIN bit
;Step 10 - Wait for time tVTP
;Step 11 - Clear the PGM bit
;Step 12 - Wait for time tHVD
;Step 13 and 14 - Check to see if the
; correct data was programmed in the
; FLASH page. If not, jump to Repeat to
; do another attempt. If so, jump to
; Complete.
Assembly Source Code
Application Note
45