W77L32 Datasheet, PDF (17/76 Pages) Winbond – 8-BIT MICROCONTROLLER

W77L32/W77L032A/W77M032A
6.3.1.7 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. This port also provides the upper
address bits for accesses to external memory.
6.3.1.8 Port 4
Bit:
7
6
5
4
-
-
-
-
Mnemonic: P4
P4.3 − 0: Port 4 is a bi-directional I/O port with internal pull-ups.
3
P4.3
2
1
0
P4.2 P4.1 P4.0
Address: A5h
Interrupt Enable
Bit:
7
6
5
4
3
2
1
0
EA ES1 ET2 ES ET1 EX1 ET0 EX0
Mnemonic: IE
Address: A8h
EA:
ES1:
ET2:
ES:
ET1:
EX1:
ET0:
EX0:
Global enable. Enable/disable all interrupts.
Enable Serial Port 1 interrupt.
Enable Timer 2 interrupt.
Enable Serial Port 0 interrupt.
Enable Timer 1 interrupt
Enable external interrupt 1
Enable Timer 0 interrupt
Enable external interrupt 0
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Publication Release Date: April 17, 2007
Revision A6