W79E201 Datasheet, PDF (20/87 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E201
Port 3
Bit:
7
P3.7
Mnemonic: P3
6
P3.6
5
P3.5
4
P3.4
3
P3.3
2
P3.2
1
P3.1
Address: B0h
0
P3.0
P3.7-0: General purpose I/O port. Each pin also has an alternate input or output function. There
alternate functions are described below table.
BIT
NAME
FUNCTION
7
P3.7 Strobe for read from external RAM
6
P3.6 _{WR Strobe for write to external RAM}
5
P3.5 _{T1 Timer/counter 1 external count input}
4
P3.4 _{T0 Timer/counter 0 external count input}
3
P3.3 _{INT1 External interrupt 1}
2
P3.2 _{INT0 External interrupt 0}
1
P3.1 _{TxD Serial port 0 output}
0
P3.0 _{RxD Serial port 0 input}
Interrupt Priority
Bit:
7
6
5
4
3
2
1
0
-
PADC PT2
PS
PT1 PX1 PT0 PX0
Mnemonic: IP
Address: B8h
BIT NAME
FUNCTION
7
- This bit is un-implemented and will read high.
6 PADC 1: To set interrupt priority of ADC is highest priority level.
5
PT2 1: To set interrupt priority of Timer 2 is highest priority level.
4
PS 1: To set interrupt priority of Serial port 0 is highest priority level.
3
PT1 1: To set interrupt priority of Serial port 0 is highest priority level.
2
PX1 1: To set interrupt priority of External interrupt 1 is highest priority level.
1
PT0 1: To set interrupt priority of Timer 0 is highest priority level.
0
PX0 1: To set interrupt priority of External interrupt 0 is highest priority level.
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