W79E225A_08 Datasheet, PDF (42/203 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E225A/226A/227A Data Sheet
BIT NAME
7-0 SADDR1
FUNCTION
The SADDR1 should be programmed to the given or broadcast address for
serial port 1 to which the slave processor is designated.
ISP ADDRESS LOW BYTE
Bit:
7
6
5
4
3
2
1
0
A7
A6
A5
A4
A3
A2
A1
A0
Mnemonic: SFRAL
Address: ACh
Low byte destination address for In System Programming operations.
ISP ADDRESS HIGH BYTE
Bit:
7
6
5
4
3
2
1
0
A15
A14
A13
A12
A11
A10
A9
A8
Mnemonic: SFRAH
Address: ADh
Low byte destination address for In System Programming operations. (SFRAH, SFRAL) represents
the address of the ROM byte that will be erased, programmed or read.
ISP DATA BUFFER
Bit:
7
6
5
4
3
2
1
0
D7
D6
D5
D4
D3
D2
D1
D0
Mnemonic: SFRFD
Address: AEh
In ISP mode, read/write a specific byte ROM content must go through SFRFD register.
ISP OPERATION MODES
Bit:
7
6
5
4
3
2
1
0
-
WFWIN NOE
NCE
CTRL3 CTRL2 CTRL1 CTRL0
Mnemonic: SFRCN
Address: AFh
BIT NAME
FUNCTION
7-
Reserved.
On-chip FLASH EPROM bank select for in-system programming.
6 WFWIN 0= AP FLASH EPROM bank is selected as destination for re-programming.
1= LD FLASH EPROM bank is selected as destination for re-programming.
5 NOE
Flash EPROM output enable.
4 NCE
Flash EPROM chip enable.
3-0 CTRL
The Flash Control Signals.
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Publication Release Date: April 15, 2008
Revision A4.0