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ATtiny88 데이터시트(PDF) 181 Page - ATMEL Corporation

부품명 ATtiny88
상세설명  8-bit Microcontroller with 4/8K Bytes In-System Programmable Flash
PDF  266 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny88 데이터시트(HTML) 181 Page - ATMEL Corporation

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181
8008C–AVR–03/09
ATtiny48/88
Write_page:
; Page Erase
ldi
spmcrval, (1<<PGERS) | (1<<SELFPRGEN)
rcallDo_spm
; re-enable the RWW section
ldi
spmcrval, (1<<CTPB) | (1<<SELFPRGEN)
rcallDo_spm
; transfer data from RAM to Flash page buffer
ldi
looplo, low(PAGESIZEB)
;init loop variable
ldi
loophi, high(PAGESIZEB)
;not required for PAGESIZEB<=256
Wrloop:
ld
r0, Y+
ld
r1, Y+
ldi
spmcrval, (1<<SELFPRGEN)
rcallDo_spm
adiw ZH:ZL, 2
sbiw loophi:looplo, 2
;use subi for PAGESIZEB<=256
brne Wrloop
; execute Page Write
subi ZL, low(PAGESIZEB)
;restore pointer
sbci ZH, high(PAGESIZEB)
;not required for PAGESIZEB<=256
ldi
spmcrval, (1<<PGWRT) | (1<<SELFPRGEN)
rcallDo_spm
; re-enable the RWW section
ldi
spmcrval, (1<<CTPB) | (1<<SELFPRGEN)
rcallDo_spm
; read back and check, optional
ldi
looplo, low(PAGESIZEB)
;init loop variable
ldi
loophi, high(PAGESIZEB)
;not required for PAGESIZEB<=256
subi YL, low(PAGESIZEB)
;restore pointer
sbci YH, high(PAGESIZEB)
Rdloop:
lpm
r0, Z+
ld
r1, Y+
cpse r0, r1
rjmp Error
sbiw loophi:looplo, 1
;use subi for PAGESIZEB<=256
brne Rdloop
; return to RWW section
; verify that RWW section is safe to read
Return:
in
temp1, SPMCSR
sbrs temp1, RWWSB
; If RWWSB is set, the RWW section is not ready yet
ret
; re-enable the RWW section
ldi
spmcrval, (1<<CTPB) | (1<<SELFPRGEN)
rcallDo_spm
rjmp Return
Do_spm:
; check for previous SPM complete
Wait_spm:
in
temp1, SPMCSR



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