gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 185

• Manufacturer Part Number: gc80c510
• Description: Eprom/rom 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

13 Appendix B: SFR description
13.1 P0 (80h) : Port 0 Register
MiDAS1.1 Family
several other SFRs.
[About the alternative pins and description]
In addition, all the pins have an alternative function listed below. Each of the functions is controlled by
Alternative Pin
This register functions as a general purpose I/O port. The initial value of P0 is FFh.
Bit No.
Port 0
ADC6 ~ ADC0
INT3B
INT1B
INT0B
AV
PWM
INT2
TXD
RXD
REF
R/W(1)
P0[7]
ADC6
P0.7
7
ADC Voltage Reference Input.
PWM Waveform Output. (Refer to ALTSEL register)
External Interrupt 3.
A falling edge on this pin will cause an external interrupt 3 if enabled.
External Interrupt 2.
A rising edge on this pin will cause an external interrupt 2 if enabled.
External Interrupt 1.
A falling edge or low level on this pin will cause an external interrupt 1 if enabled.
External Interrupt 0.
A falling edge or low level on this pin will cause an external interrupt 0 if enabled.
Serial Port Transmit.
This pin transmits the serial port data in serial port modes 1 and emits the
synchronizing clock in serial port mode 0. (Refer to ALTSEL register)
Serial Port Receive.
This pin receives the serial port data in serial port modes 1 and is a bi-directional
data transfer pin in serial port mode 0.
ADC Analog Input 6 ~ 0
R/W(1)
P0[6]
ADC5
PWM
P0.6
6
R/W(1)
P0[6]
ADC4
P0.5
5
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R/W(1)
P0[4]
ADC3
AV
P0.4
4
REF
Description
R/W(1)
INT3B
P0[3]
ADC2
P0.3
3
R/W(1)
ADC1
P0[2]
INT2
P0.2
TXD
2
R/W(1)
INT1B
P0[1]
ADC0
P0.1
RXD
1
R/W(1)
INT0B
P0[0]
PWM
P0.0
TVO
0