EM73880 데이터 시트보기 (PDF) - ELAN Microelectronics

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EM73880

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

EM73880

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

CLK

0.022uF

fc

High-frequency

P14

generator

System clock

P16

LXIN

fs

mode control

Low-frequency

P19

LXOUT

generator

P22

Mask option for choose Crystal or RC oscillator

System control

20PF

LXIN

VDD R

LXIN

LXOUT

open

LXOUT

Crystal connection

SYSTEM CLOCK MODE CONTROL

RC oscillator connection

R=1.2MΩ

The system clock mode controller can start or stop the high-frequency and low-frequency clock oscillator

and switch between the basic clocks. EM73880 has four operation modes (NORMAL, SLOW,IDLE and

STOP operation modes).

STOP

operation

mode

High osc : stopped

Low osc : stopped

RESET

operation

Reset

I/O wakeup

Command

(P16)

Reset

NORMAL

operation

mode

High osc : oscillating

Low osc : oscillating

Command

(P22)

Reset release

Command

(P22)

Command

(P16)

Reset

SLOW

operation

mode

Reset

Command

(P19)

High osc : stopped

Low osc : oscillating

I/O or internal timer wakeup

IDLE

(CPU

stops)

Operation Mode

Oscillator

NORMAL High, Low frequency

SLOW

Low frequency

IDLE

Low frequency

STOP

None

High osc : stopped

Low osc : oscillating

System Clock

High frequency clock

Low frequency clock

CPU stops

CPU stops

Available function

LCD, HST, Speech sound

LCD, HST

LCD

All disable

* This specification are subject to be changed without notice.

One instruction cycle

8 / fc

8 / fs

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11.30.2001 13

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