GMS36 Datasheet, PDF (20/109 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 2. GMS37XXX
Pin Description
Pin
VDD
GND
K0 ~ K3
I/O
Function
-
Connected to 2.0~ 3.6V power supply
-
Connected to 0V power supply.
Input
4-bit input port with built in pull-up resistor.
STOP mode is released by "L" input of each pin. ( masked option)
D0 ~ D9
R0 ~ R3
OSC1
OSC2
REMOUT
Output
I/O
Input
Output
Output
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.
Pull-up resistor and STOP release mode can be respectively selected
as masked option for each pin. (It is released by "L" input at STOP)
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 CMOS.
The state of large current on is "H".
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