Pad Name

I/O

Description

IOB1~4

I/O

I/O Input/Output port B.

IOB1, 2 shares pins with SEG41, 42, or ELC, ELP and is set by mask option.

IOB3, 4 shares pins with BZ, BZB and is set by mask option.

IOC1~4

I/O

I/O Input/Output port C can use software to define the internal pull-low/

low-level hold resistor and chattering clock in order to reduce input bounce and

generate interrupt. This port shares pins with AN1-4 and is set by mask option.

IOD1~4

I/O

Input / Output port D.

This port shares pins with SEG33~36 and is set by mask option.

IOD3,4 shares pins with PWM1,2 and is set by mask option.

RFC

CC

RR

RT

RH

I

O

O

O

1 input pin and 3 output pins for RFC application.

This port shares pins with SEG37~40 and is set by mask option.

This port shares pins with IOA1~4 and is set by mask option.

EL

ELC

ELP

O

O

Output port for the EL-light.

These ports share pins with SEG41, 42 and are set by mask option.

These ports share pins with IOB1, 2 and are set by mask option.

ALM

BZB

Z

O

O

Output port for alarm, frequency or melody generator.

This port shares pins with IOB3,4 and is set by mask option.

GND

Negative supply voltage.

Preliminary

5

Ver. 0.0

APU428