gc80c520a CORERIVER Semiconductor, gc80c520a Datasheet - Page 165

• Manufacturer Part Number: gc80c520a
• Description: Midas1.0 Family Mask Rom/eprom/romless 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

15.13 Port 1 Register (P1)
This register functions as a general purpose I/O port. In addition, all the pins have an alternative function
listed below. Each of the functions is controlled by several other SFRs. The associated Port 1 latch bit
must contain a logic one before the pin can be used in its alternative function capacity.
Bit No.
90h
Symbol
PWM1
/INT5
/INT3
ADC3
ADC2
ADC1
T2EX
INT4
INT2
T2
MiDAS1.0 Family
R/W(1)
/INT5
P1.7
7
Function
External Interrupt 5. A falling edge on this pin will cause an external interrupt 5 if
enabled.
External Interrupt 4. A rising edge on this pin will cause an external interrupt 4 if
enabled.
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.
ADC Analog Input 3.
ADC Analog Input 2.
ADC Analog Input 1
Timer 2 Capture/Reload Trigger. A 1-to-0 transition on this pin will cause the value in
the T2 registers to be transferred into the capture registers if enabled by EXEN2
(T2CON.3). When in auto-reload mode, a 1-to-0 transition on this pin will reload the
Timer 2 register with the value in RCAP2L and RCAP2H if enabled by EXEN2.
Timer 2 External Input. A 1-to-0 transition on this pin will cause Timer 2 to increment or
decrement depending on the timer configuration.
PWM Waveform Output 1.
R/W(1)
INT4
P1.6
6
R/W(1)
/INT3
P1.5
5
R/W(1)
INT2
P1.4
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4
R/W(1)
ADC3
P1.3
3
R/W(1)
ADC2
P1.2
2
R/W(1)
ADC1
T2EX
P1.1
1
R/W(1)
PWM1
P1.0
T2
0
P1