W77E468 查看數據表（PDF） - Winbond
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W77E468 Datasheet PDF : 84 Pages
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Preliminary W77E468
RI: Receive interrupt flag: This flag is set by hardware at the end of the 8th bit time in mode 0, or
halfway through the stop bits time in the other modes during serial reception. However the
restrictions of SM2 apply to this bit. This bit can be cleared only by software.
SERIAL 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
SBUF.7-0: Serial data on the serial port 0 is read from or written to this location. It actually consists of
two separate internal 8-bit registers. One is the receive resister, 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.
PORT 2
Bit:
7
6
5
4
3
2
1
0
P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0
Mnemonic: P2
Address: A0h
P2.7-0: Port 2 is a bi-directional I/O port with internal pull-ups.
HIGH BYTE REGISTER
Bit:
7
6
5
4
3
2
1
0
Mnemonic: HB
Address: A1h
This register contains the high byte address during execution of " MOVX @Ri, " instructions.
PORT 4
Bit:
7
P4.7
Mnemonic: P4
6
P4.6
5
P4.5
4
P4.4
3
2
1
P4.3 P4.2 P4.1
Address: A6h
0
P4.0
P4.7-0: Port 4 is a bi-directional I/O port with internal pull-ups.
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Publication Release Date: January 1999
Revision A1
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