Description Of Pins - LAPIS Semiconductor ML610Q421 User Manual

1.3.3

Description of Pins

Pin name I/O
System
Reset input pin. When this pin is set to a "L" level, system reset mode is
RESET_N I
set and the internal section is initialized. When this pin is set to a "H" level
subsequently, program execution starts. A pull-up resistor is internally
connected.
Crystal connection pin for low-speed clock.
XT0 I
A 32.768 kHz crystal oscillator (see measuring circuit 1) is connected to
XT1 O
this pin. Capacitors CDL and CGL are connected across this pin and V
as required.
Crystal/ceramic connection pin for high-speed clock.
OSC0 I
A crystal or ceramic is connected to this pin (4.1 MHz max.). Capacitors
OSC1 O
CDH and CGH (see measuring circuit 1) are connected across this pin
and V
This pin is used as the secondary function of the P10 pin(OSC0) and P11
pin(OSC1).
Low-speed clock output pin. This pin is used as the secondary function of
LSCLK O
the P20 pin.
High-speed clock output pin. This pin is used as the secondary function
OUTCLK O
of the P21 pin.
General-purpose input port
General-purpose input port.
P00-P03 I
Since these pins have secondary functions, the pins cannot be used as a
port when the secondary functions are used.
General-purpose input port.
P10-P11 I
Since these pins have secondary functions, the pins cannot be used as a
port when the secondary functions are used.
General-purpose output port
General-purpose output port.
P20-P22 O
Since these pins have secondary functions, the pins cannot be used as a
port when the secondary functions are used.
General-purpose input/output port
I/O General-purpose input/output port.
P30-P35
Since these pins have secondary functions, the pins cannot be used as a
port when the secondary functions are used.
I/O General-purpose input/output port.
P40-P47
Since these pins have secondary functions, the pins cannot be used as a
port when the secondary functions are used.
I/O General-purpose input/output port.
PA0-PA7
These pins are for the ML610Q421/ML610421, but are not provided in
the ML610Q422.
.
SS
ML610Q421/ML610Q422/ML610421 User's Manual
Description
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Chapter 1 Overview
Primary/
Secondary/
Logic
Tertiary
— Negative
— —
— —
SS
Secondary —
Secondary —
Secondary —
Secondary —
Primary Positive
Primary Positive
Primary Positive
Primary Positive
Primary Positive
Primary Positive