HMS38112 Datasheet, PDF (9/73 Pages) List of Unclassifed Manufacturers – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 1.HMS38112
Pin Description and Circuit
Pin Description
Pin
VDD
GND
K0 ~ K3
I/O
-
-
Input
Function
Connected to 2.0~ 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.
D0 ~ D5
R0 ~ R1
R2 ~ R3
OSC1
OSC2
PGND
REMOUT
Output
Each can be set and reset independently.
The output is the structure of N-channel-open-drain.
Input
I/O
Input
2-bit input port with built in pull-up resistor.
STOP mode is released by "L" input of each pin.
2-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.
A feedback resistor is connected between this pin and OSC2.
Output
-
Connect a resonator between this pin and OSC1.
Ground pin for internal high current N-channel transistor.
(connected to GND)
Output
High current output port for driving I.R.LED.
The output is in the form N-channel open drain.
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