Chapter 1. Introduction
I/O circuit types and options
GMS340 series I/O port types
Pin
I/O
Function
Connected to 2.0~4.0V power supply.
Connected to 0V power supply.
VDD
-
-
GND
¡ È ¡ È
L , the
Used to input a manual reset. When the pin goes
RESET
Input
D-output ports and REMOUT-output port are initialized to
¡ È ¡ È
L
, and ROM address is set to address 0 on page 0.
4-bit input port.
Released STOP mode built in pull-up resistor by each pin as
masked option.
K0~K3
D0~D9
Input
¡ È ¡ È
L input at STOP)
(It is released by
Each can be set and reset independently. The output is in
the form of N-channel-open-drain.
Output
4-bit I/O port. (Input mode is set only when each of them
¡ È ¡ È
output
H
.)
In outputting, each can be set and reset independently(or at
once.)
R0~R3
I/O
The output is in the form of N-channel-open-drain.
Pull-up resistor and STOP release mode can be respectively
selected as masked option for each bit. (It is released by
¡ È ¡ È
L
input at STOP.)
High current output port.
The output is in the form of C-MOS.
REMOUT
Output
¡ È ¡ È
The state of large current on is
H
.
Oscillator input. Input to the oscillator circuit and connection
point for ceramic resonator.
Internal capacitors available as masked option.
A feedback resistor is connected between this pin and OSC2
OSC1
OSC2
Input
Output
Connect a ceramic resonator between this pin and OSC1.
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HYNIX [ HYNIX SEMICONDUCTOR ]
