W77IE58 Datasheet, PDF (22/90 Pages) Winbond – 8-BIT MICROCONTROLLER

Preliminary W77IE58
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.
Port 4
Bit:
7
6
5
4
3
2
1
0
-
-
-
-
P4.3 P4.2 P4.1 P4.0
Mnemonic: P4
P4.3-0: Port 4 is a bi-directional I/O port with internal pull-ups.
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 except for PFI.
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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