HMS38112 Datasheet, PDF (21/73 Pages) List of Unclassifed Manufacturers – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 2.HMS39112
Pin Description and Circuit
Pin Description
Pin
VDD
GND
I/O
Function
-
Connected to 2.0~ 3.6V power supply
-
Connected to 0V power supply.
K0 ~ K3
Input
4-bit input port with built in pull-up resistor.
STOP mode is released by "L" input of each pin.(masked option)
D0 ~ D6
Output
Each can be set and reset independently.
The output is the structure of N-channel-open-drain.
R0 ~ R1
R2 ~ R3
OSC1
OSC2
REMOUT
Input
2-bit input port with built in pull-up resistor.
STOP mode is released by "L" input of each pin.(masked option)
I/O
Input
Output
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.
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.
A feedback resistor is connected between this pin and OSC2.
Connect a resonator between this pin and OSC1.
Output
High current output port for driving I.R.LED.
The output is in the form N-channel open drain.
2-6