W79E217A Datasheet, PDF (29/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
BIT NAME
7-0 P1
FUNCTION
General purpose I/O port. Most instructions will read the port pins in case of a
port read access, however in case of read-modify-write instructions, the port
latch is read. Some pins also have alternate input or output functions. The
alternate functions are described below.
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
ALTERNATE FUNCTION1
T2: External I/O for Timer/Counter 2
PWM Brake
RXD1
TXD1
ALTERNATE FUNCTION2
ADC0: Analog input0
ADC1: Analog input1
ADC2: Analog input2
ADC3: Analog input3
ADC4: Analog input4
ADC5: Analog input5
ADC6: Analog input6
ADC7: Analog input7
EXTERNAL INTERRUPT FLAG
Bit:
7
6
5
4
3
2
1
0
IE5
IE4
IE3
IE2
-
-
-
-
Mnemonic: EXIF
Address: 91h
BIT NAME
FUNCTION
7 IE5
External Interrupt 5 flag. Set by hardware when a rising/falling/both edges is
detected onINT5 pin.
6 IE4
External Interrupt 4 flag. Set by hardware when a rising/falling/both edges is
detected on INT4 pin.
5 IE3
External Interrupt 3 flag. Set by hardware when a rising/falling/both edges is
detected on INT3 pin.
4 IE2
External Interrupt 2 flag. Set by hardware when a rising edge is detected on
INT2 pin.
3-0 -
Reserved.
PORT 4 CONTROL REGISTER A
Bit:
7
6
5
4
3
2
1
0
P41FUN1 P41FUN0 P41CMP1 P41CMP0 P40FUN1 P40FUN0 P40CMP1 P40CMP0
Mnemonic: P4CONA
Address: 92h
- 29 -
Publication Release Date: December 14, 2007
Revision A3.0