EM73461B Ver la hoja de datos (PDF) - ELAN Microelectronics

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componentes Descripción

Fabricante

EM73461B

B 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

CLK

LXIN

LXOUT

EM73461B

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

fc

High-frequency

P14

generator

System clock

P16

fs

Low-frequency

mode control

P19

generator

P22

Mask option for choose Crystal or RC oscillator

System control

CLK

CLK

20PF

LXIN

0.022uF

330KΩ

20PF

LXOUT

PLL connection RC connection

Crystal connection

1.2MΩ

LXIN

RC connection

SYSTEM CLOCK MODE CONTROL

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

and switch between the basic clocks. EM73461B 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

NORMAL

SLOW

IDLE

STOP

High osc : stopped

Low osc : oscillating

Oscillator

High, Low frequency

Low frequency

Low frequency

None

System Clock

High frequency clock

Low frequency clock

CPU stops

CPU stops

Available function One instruction cycle

LCD, High speed timer

8/fc

LCD, High speed timer 4/fs or 8/fs by mask option

LCD

-

All disable

-

* This specification are subject to be changed without notice.

12.26.2001 15

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