EM78P468LBQ datasheet(13/83 Pages) EMC

13 / 83 page

EM78P468L

8-BIT Microcontroller

Product Specification (V1.0) 03.15.2006

• 9

(This specification is subject to change without further notice)

Table 1 (b) Pin Description for Package of QFP44 and LQFP44

PIN number

I/O type

Description

VDD

* Power supply pin

GND

* System ground pin

R-OSCI

* In crystal mode: crystal input

* In RC mode: resistor pull high.

* In PLL mode: connect 0.01μF capacitance to GND

* Connect 0.01μF capacitor to GND and code option

select PLL mode when high oscillator is not use.

OSCO

* In crystal mode: crystal output

* In RC mode: instruction clock output

Xin

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

32.768KHz crystal

* RC mode: this pin is connected with a resistor to high

level.

Xout

* In crystal: Connect to a 32.768KHz crystal

* In RC mode: instruction clock output

/RESET

* Low active. If set as /RESET and remains at logic low

* the devices will be reset

P5.4/INT0

I/O

* General purpose I/O pin. /external interrupt.

* INT0 interruption source can be set to falling or rising

edge by IOC71 register bit 7 (INT_EDGE).

* Wake up from sleep mode and idle mode when the pin

status changes.

P5.5/INT1

I/O

* General purpose I/O pin. /external interrupt.

* Interruption source is a falling edge signal.

* Wake up from sleep mode and idle mode when the pin

status changes.

P5.6/TCC

I/O

* General purpose I/O/ external counter input

* This pin works in normal/green/idle mode.

P5.7/IROUT

I/O

* General purpose I/O pin or IR/PWM mode output pin,

* Capable of sinking 20mA/5V.

P6.0

P6.7

25~32

I/O

* General purpose I/O pin.

* Pull-high, pull-low and open drain function support.

* 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

purposes 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

EM78P468LBQ Datasheet(PDF) 13 Page - ELAN Microelectronics Corp

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