w79e532 Winbond Electronics Corp America, w79e532 Datasheet - Page 19

• Manufacturer Part Number: w79e532
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

ISP Address Low Byte
Low byte destination address for In System Programming operation. SFRAH and SFRAL address a
specific ROM byte for erasure, programming or read.
ISP Address High Byte
High byte destination address for In System Programming operation. SFRAH and SFRAL address a
specific ROM byte for erasure, programming or read.
ISP Data Buffer
ISP Operation Modes
BANK: Select APFlash banks for ISP. Set it 1 access to APFlash1, clear it to APFlash0.
WFWIN: Destination ROM bank for programming, erasure and read. 0 = APFlashx, 1 = LDFlash.
NOE: Flash EPROM output enable.
NCE: Flash EPROM chip enable.
CTRL[3:0]: Mode Selection.
Erase 4KB LDFlash
Erase 64K APFlash0
Erase 64K APFlash1
Program 4KB LDFlash
In ISP mode, read/write a specific byte ROM content must go through SFRFD register.
ISP Mode
Mnemonic: SFRAH
Mnemonic: SFRFD
Mnemonic: SFRCN
Mnemonic: SFRAL
Bit:
Bit:
Bit:
Bit:
BANK
BANK
A15
A7
D7
0
0
1
0
7
7
7
7
WFWIN
WFWIN
A14
A6
D6
1
0
0
1
6
6
6
6
NOE
NOE
A13
D5
1
1
1
1
A5
5
5
5
5
- 19 -
NCE
0
0
0
0
NCE
A12
D4
A4
4
4
4
4
Publication Release Date: November 21, 2005
CTRL<3:0>
CTRL3
0010
0010
0010
0001
A11
W79E532/W79L532
A3
D3
3
3
3
3
CTRL2
A10
A2
D2
2
2
2
2
Address in
SFRAH,
SFRAL
Address: ADh
Address: AEh
Address: AFh
Address: ACh
X
X
X
CTRL1
D1
A1
A9
1
1
1
1
Revision A5
SFRFD
Data in
CTRL0
A0
D0
X
X
X
A8
0
0
0
0