gc80c520g CORERIVER Semiconductor, gc80c520g Datasheet - Page 10

• Manufacturer Part Number: gc80c520g
• Description: Eprom / Rom / Romless Based 8-bit Turbo Microcontrollers
• Manufacturer: CORERIVER Semiconductor

P0[7:0]
P1[7:0]
P2[0:7]
P3[7:0]
P4[3:0]
Symbol
RESET
XTAL1
XTAL2
5. Pin Descriptions
PSEN
ALE
V
V
EA
DD
SS
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Direction
Output
Input
Input
Input
Input
Input
Power Supply
Ground
External Reset
Input to the inverting oscillator amplifier
Output from the inverting oscillator amplifier
External Access Enable (0
This pin must not be floating.
Address Latch Enable
Program Store Enable (Enables external program memory to the bus)
Programmable I/O Port: Schmitt Trigger Input or Push-pull/Open-Drain Output.
Pull-up Resistor can be switched on/off by Software.
Programmable I/O Port: Schmitt Trigger Input or Push-pull Output.
Pull-up Resistor can be switched on/off by Software.
Programmable I/O Port: Schmitt Trigger Input or Push-pull Output
Pull-up Resistor can be switched on/off by Software.
Programmable I/O Port: Schmitt Trigger Input or Push-pull Output.
Pull-up Resistor can be switched on/off by Software.
Programmable I/O Port: Schmitt Trigger Input or Push-pull Output.
Pull-up Resistor can be switched on/off by Software.
fetched from external ROM, 1
Description
from internal ROM)
MiDAS1.0 Family
P0.0 / AD0 / ADC0
P0.1~P0.7 / AD1~7
P1.0 / T2 / PWM1
P1.1 / T2EX / ADC1
P1.2~P1.3 / ADC2~ADC3
P1.4~P1.7 / INT2~INT5
P2.0~P2.7 / A8~A15
P3.0 / RXD
P3.1 / TXD
P3.2~P3.3 / INT0~INT1
P3.4 / T0 / PWM0
P3.5 / T1
P3.6 / WR
P3.7 / RD
Share Pins
PROG
VPP
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