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MPC89E53AF Scheda tecnica(PDF) 28 Page - Megawin Technology Co., Ltd

Il numero della parte MPC89E53AF
Spiegazioni elettronici  8-bit micro-controller
PDF  38 Pages
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Produttore elettronici  MEGAWIN [Megawin Technology Co., Ltd]
Homepage  http://www.megawin.com.tw/megawin_EN/Index.asp
Logo MEGAWIN - Megawin Technology Co., Ltd

MPC89E53AF Scheda tecnica(HTML) 28 Page - Megawin Technology Co., Ltd

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Furthermore, it is a quite complex timing procedure to erase/program flash. Fortunately, the
MPC89x53A carried with convenient mechanism to help the user read/change the flash
content. Just filling the target address and data into several SFR, and triggering the built-in ISP
automation, the user can easily erase, read, and program the embedded flash and option
registers OR1.
There are several SFR designed to help the user implement the ISP functionality.
SFR: IFD (ISP Flash Data register):
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
(Data to be written into flash, or data got from flash)
IFD is the data port register for ISP operation. The data in IFD will be written into the desired address in
operating ISP write and it is the data window of readout in operating ISP read.
SFR: IFADRH (ISP Flash Address High):
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
(High byte of the address pointing to flash memory)
IFADRH is the high-byte address port for all ISP modes.
SFR: IFADRL (ISP Flash Address Low):
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
(Low byte of the address pointing to flash memory)
IFADRL is the low-byte address port for all ISP modes.
SFR: IFMT (ISP Flash Mode Table):
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
reserved
Mode Selection
Mode Selection
To Operate
0
0
0
Standby
0
0
1
AP-memory read
0
1
0
AP-memory/Data-flash program
0
1
1
AP-memory/Data-flash page erase
1
1
1
OR1 memory erase (IFADRL[0]=1).
1
0
1
OR1 memory read ( IFADRL[0] =1)
1
1
0
OR1 memory program ( IFADRL[0] = 1)
Note: OR0 cannot be changed by ISP operation. It can be accessed only by Writer. Only OR1 can be
changed by ISP program.
28
MPC89x53A Data Sheet
MEGAWIN



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