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MPC89x53AF 데이터시트(PDF) 30 Page - Megawin Technology Co., Ltd

부품명 MPC89x53AF
상세설명  8-bit micro-controller
PDF  38 Pages
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제조업체  MEGAWIN [Megawin Technology Co., Ltd]
홈페이지  http://www.megawin.com.tw/megawin_EN/Index.asp
Logo MEGAWIN - Megawin Technology Co., Ltd

MPC89x53AF 데이터시트(HTML) 30 Page - Megawin Technology Co., Ltd

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IFMT ← xxxxx010 b
/* choice byte-programming command */
ISPCR ← 100xx010b
/* set ISPEN=1 to enable flash change.
set WAIT=010, 60 MC; assumed 10M X’s*/
IFADRH ← (Address high byte)
/* specify the address to be programmed */
IFADRL ← (Address low byte)
IFD ← (byte date to be written into flash)
/* prepare data source */
SCMD ← 46h
/* trig ISP activity */
SCMD ← B9h
(CPU progressing will be hold here)
(CPU continues)
Program a byte into flash
IFMT ← xxxxx001 b
/* choice byte-read command */
ISPCR ← 100xx010b
/* set ISPEN=1 to enable flash change.
set WAIT=010, 11 MC; assumed 10M X’s*/
IFADRH ← (Address high byte)
/* specify the address to be read */
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
Booting Program Entrance
The MPC89x53A boots according to the following rule.
System will boot from normal AP program
else
System will boot from ISP program
If
( HWBS == 0 )
&& ( { ISPAS1, ISPAS0}
≠ { 1, 1 })
Above rule is adaptive only for power-up procedure, while not software reset.
Switching from ISP program to AP program
The device permits the user normally start running the AP program as soon as the ISP
program has finished updating the flash content. Just program an instruction at the tail of ISP
program as
ISPCR ←
001xxxxx
b
30
MPC89x53A Data Sheet
MEGAWIN



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