Procedures demonstrating ISP function
IFMT
←
xxxxx011
B
ISPCR
←
100xx010
B
IFADRH
←
(page address high byte)
IFADRL
←
(page address low byte)
SCMD
←
46h
SCMD
←
B9h
(CPU progressing will be hold here )
(CPU continues)
/* choice page-erasing command */
/* set ISPEN=1 to enable flash change.
set WAIT=010, 10942 MC; assumed 10M X’s*/
/* specify the address of the page to be erased */
/* trig ISP activity */
Erase a specific flash page
IFMT
←
xxxxx010
B
ISPCR
←
100xx010
B
IFADRH
←
(Address high byte)
IFADRL
←
(Address low byte)
IFD
←
(byte date to be written into flash)
SCMD
←
46h
SCMD
←
B9h
(CPU progressing will be hold here)
(CPU continues)
/* choice byte-programming command */
/* set ISPEN=1 to enable flash change.
set WAIT=010, 60 MC; assumed 10M X’s*/
/* specify the address to be programmed */
/* prepare data source */
/* trig ISP activity */
Program a byte into flash
IFMT
←
xxxxx001
B
ISPCR
←
100xx010
B
/* choice byte-read command */
/* set ISPEN=1 to enable flash change.
set WAIT=010, 11 MC; assumed 10M X’s*/
/* specify the address to be read */
IFADRH
←
(Address high byte)
IFADRL
←
(Address low byte)
SCMD
←
46h
/* trig ISP activity */
SCMD
←
B9h
(CPU progressing will be hold here)
(CPU continues and currently
IFD
contain the desired data byte )
Read a byte from flash
62
MPC82x54A Data Sheet
MEGAWIN
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
