W79E217A Datasheet, PDF (32/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
ERIAL DATA BUFFER
Bit:
7
6
5
4
3
2
1
0
SBUF.7 SBUF.6 SBUF.5 SBUF.4 SBUF.3 SBUF.2 SBUF.1 SBUF.0
Mnemonic: SBUF
Address: 99h
BIT NAME
7-0 SBUF
FUNCTION
Serial data is read from or written to this location. It consists of two separate 8 bit
registers. One is the receive buffer, and the other is the transmit buffer. Any read
access gets data from the receive data buffer, while write access is to the
transmit data buffer.
P4.2 BASE ADDRESS LOW BYTE REGISTER
Bit:
7
6
5
4
3
2
1
0
A7
A6
A5
A4
A3
A2
A1
A0
Mnemonic: P42AL
Address: 9Ah
P4.2 BASE ADDRESS HIGH BYTE REGISTER
Bit:
7
6
5
4
3
2
1
0
A15
A14
A13
A12
A11
A10
A9
A8
Mnemonic: P42AH
Address: 9Bh
P4.3 BASE ADDRESS LOW BYTE REGISTER
Bit:
7
6
5
4
3
2
1
0
A7
A6
A5
A4
A3
A2
A1
A0
Mnemonic: P43AL
Address: 9Ch
P4.3 BASE ADDRESS HIGH BYTE REGISTER
Bit:
7
6
5
4
3
2
1
0
A15
A14
A13
A12
A11
A10
A9
A8
Mnemonic: P43AH
Address: 9Dh
NVM CONTROL
Bit:
7
6
5
4
3
2
1
0
EER
EWR
EnNVM
-
-
-
-
NVMF
Mnemonic: NVMCON
Address: 9Eh
BIT NAME
FUNCTION
Set this bit to erase NVM data of page (n) to FFH.
The NVM has 32 pages that each page has 64 bytes data memory. By select
7
EER
NVMADDRH and NVMADDRL of NVM address registers that will automatic
enable page area. If set this bit, the page will be page erased, after finished,
the NVMF flag will be set to “1”, then this bit will be cleared. If NVMF flag is set,
the erase and write NVM data memory are invalid.
- 32 -
Publication Release Date: December 14, 2007
Revision A3.0