EM78P468NBQSSLASHNBQJ datasheet(11/82 Pages) EMC

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EM78P468N/L

8-Bit Microcontroller

Product Specification (V1.6) 12.31.2007

• 5

(This specification is subject to change without further notice)

Table 2 (b) Pin Description for Package of QFP44 and LQFP44

Symbol

Pin No.

Type

Function

P5.4/INT0

I/O

1-bit General purpose input/output pin/external interrupt.

The INT0 interrupt source can be set to falling or rising edge by

IOC71 register Bit 7 (INT_EDGE).

Wakes up from sleep mode and idle mode when the pin status

changes.

P5.5/INT1

I/O

1-bit General purpose input/output pin/external interrupt.

The Interrupt source is a falling edge signal.

Wakes up from sleep mode and idle mode when the pin status

changes.

P5.6/TCC

I/O

1-bit General purpose input/output pin/external counter input.

This pin works in normal/green/idle mode.

P5.7/IROUT

I/O

1-bit General purpose input/output pin/IR/PWM mode output pin

This pin is capable of sinking 20mA/5V.

P6.0~P6.7

25~32

I/O

8-bit General purpose input/output pins

Pull-high, pull-low and open drain function supported.

All pins can wake up from sleep and idle modes when the pin

status changes.

COM3~0

6~9

LCD common output pin.

SEG11~SEG14

5~2

LCD segment output pin.

SEG16/P7.0

SEG17/P7.1

SEG23/P7.7

O/(I/O)

LCD segment output pin.

Can be shared with general purpose I/O pin

SEG24/P8.0

SEG31/P8.4

O/(I/O)

LCD segment output pin. Can be shared with general I/O pin

For general purpose I/O use, can wake up from sleep mode and

idle mode when the pin status changes.

For general purposes I/O use, supports pull-high function.

Connect capacitors for LCD bias voltage.

VLCD2

One of LCD bias voltage.

VLCD3

One of LCD bias voltage.

/RESET

General-purpose Input only

Low active. If it remains at logic low, the device will be reset.

R-OSCI

In Crystal mode: crystal input

In RC mode: resistor pull high.

In PLL mode: connect 0.01

μF capacitance to GND

Connect 0.01

μF capacitor to GND and code option select PLL

mode when high oscillator is not use

OSCO

In Crystal mode: crystal input

In RC mode: instruction clock output

Xin

In Crystal mode: Input pin for sub-oscillator. Connect to a

32.768kHz crystal.

Xout

In Crystal mode: Connect to a 32.768kHz crystal.

In RC mode: instruction clock output

VDD

Power supply

GND

System ground pin

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