GMS36 Datasheet, PDF (87/109 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 8. GMS37XXXT
Pin Description
Pin
VDD
GND
K0 ~ K3
D0 ~ D9
R0 ~ R3
OSC1
OSC2
REMOUT
I/O
-
-
Input
Output
I/O
Input
Output
Output
Function
Connected to 2.2~ 3.6V power supply
Connected to 0V power supply.
4-bit input port with built in pull-up resistor.
STOP mode is released by "L" input of each pin.
Especially, K3 is the input pin for VPP.
For programming K3 pin receives 12.5V(programming voltage).
Each can be set and reset independently.
The output is the structure of N-channel-open-drain.
4-bit I/O port. (Input mode is set only when each of them output
"H".)
In outputting, each can be set and reset independently(or at once.)
The output is in the form of C-MOS.
STOP mode is released by "L" input of each pin.
Oscillator input. Input to the oscillator circuit and connection point for
ceramic resonator.
Internal capacitors available at kHz version.
A feedback resistor is internally connected between this pin and
OSC2.
Connect a resonator between this pin and OSC1.
High current output port
The output is in the form of C-MOS.
The state of large current on is “ H “
8-2