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參數(shù)資料
| 型號(hào)： | AN2635 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | On-Chip FLASH Programming Routines |
| 中文描述： | 片上閃存編程例程 |
| 文件頁數(shù)： | 12/36頁 |
| 文件大?。?/td> | 150K |
| 代理商： | AN2635 |
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On-Chip FLASH Programming Routines, Rev. 4
12
Freescale Semiconductor
How to Use the Routines
verifying operations. The RDVRRNG routine can be used to verify a programmed FLASH range against
the DATA array.
Interrupts are masked and the COP is serviced in this routine. The first COP is serviced at 59 bus cycles
after this routine is called in the user software.
Entry Condition
H:X — Contains the beginning address in a range.
LADDR — Contains the last address in a range.
CPUSPD — Contains the nearest integer value of f
op
(in MHz) times 4.
DATA array — Contains the data values to be programmed into FLASH.
Exit Condition
H:X — Contains the address of the next byte after the range just programmed.
Example 5:
Programming a Row
Example 5 shows how to program one full 32-byte row:
PRGRNGE equ $038A ;LB8 PRGRNGE jump address
ldhx #$0000 ;Index offset into DATA array
lda #$AA ;Initial data value (inverted)
Data_load:
coma ;Alternate between $55 and $AA
sta DATA,x ;Fill DATA array, 32 bytes data,
; values to program into FLASH
aix #1 ; (ie. 55, AA, 55, AA....)
cphx #$20
bne Data_load
mov #$0A,CPUSPD ;fop = 2.4576MHz in this example
ldhx #$C01F ;Load last address of the row
sthx LADDR ; to LADDR
ldhx #$C000 ;Load beginning address of the
; row to H:X
jsr PRGRNGE ;Call PRGRNGE routine
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