gc80c520a CORERIVER Semiconductor, gc80c520a Datasheet - Page 13

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

5 Pin Description
Symbol
P0[7:0]
P1[7:0]
P2[7:0]
P3[7:0]
P4[3:0]
RESET
XTAL1
XTAL2
/PSEN
VDD
VSS
ALE
/EA
MiDAS1.0 Family
Output
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
In/Out
Type
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 → fetched from external
ROM, 1 → from internal ROM).
be floating.
Address latch enable
Program strobe enable (External ROM output
enable signal)
Programmable I/O Port: Schmitt Trigger Input or
Push-pull/Open-Drain Output. Pull-up Resistors can
be switched on/off by Software.
Programmable I/O Port: Schmitt Trigger Input or
Push-pull Output. Pull-up Resistors can be switched
on/off by Software.
Programmable I/O Port: Schmitt Trigger Input or
Push-pull Output. Pull-up Resistors can be switched
on/off by Software
Programmable I/O Port: Schmitt Trigger Input or
Push-pull Output. Pull-up Resistors can be switched
on/off by Software.
Programmable I/O Port: Schmitt Trigger Input or
Push-pull Output. Pull-up Resistors can be switched
on/off by Software.
Table 5-1 Pin Description
Description
Page 13 of 187
This pin must not
P1.2~P1.3/ADC2~ADC3
P1.4~P1.7/INT2~INT5
P3.2~P3.3/INT0~INT1
P3.0/RXD, P3.1/TXD
P2.0~P2.7/A8~A15
P3.5/T1, P3.6/WR
P1.1/T2EX/ADC1
P0.0/AD0/ADC0
P1.0/T2/PWM1
P3.4/T0/PWM0
Alternate Pins
P0.1~P0.7
P3.7 / RD
AD1~7
/PROG
VPP
-
-
-
-
-
-
-