GMS30004 Datasheet, PDF (12/158 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 1. Introduction
Pin Description
Pin
Name
Input/Output
Function
VDD
Connected to 2.0~4.0V power supply
GND
RESET
Ground
Reset input
Connected to 0V power supply.
I
Reset signal input which is a low active.
OSC1
Oscillator input
I
I/O pins of internal clock oscillating circuit.
Built in feedback resistor. Connect a ceramic
OSC2
Oscillator output
O
resonator to these pins.
REMOUT
O
Remocon signal output port which has high
current driving capability.
R0 ~ R3
R-Port
I/O
4bit programmable I/O port.
K0 ~ K3
K-Port
I
4bit input port with built in pull-up resistor.
D0 ~ D9
D-Port
10bit output port which can be set or reset pin
O
by pin independently.
The output structure is N-channel open drain.
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