EM73A89B Просмотр технического описания (PDF) - ELAN Microelectronics

Номер в каталоге

Компоненты Описание

производитель

EM73A89B

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

P22 3 2

**

SOM

0

1

1

0

* SOM

EM73A89B

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

Initial value : ***0

Select operation mode

DUAL operation mode

SLOW operation mode

P14

32

10

ACT WKS SINT CPUS

Initial value : 0000

CPUS

0

1

CPU status

DUAL operation mode

SLOW operation mode

WKS

0

1

Wakeup status

Wakeup not by internal timer

Wakeup by internal timer

Port14 is the status register for CPU. P14.0 (CPU status) is a read-only bit. P14.2 (wakeup status) will be

set as "1" when CPU is waked by internal timer. P14.2 will be cleared as "0" when user out data to P14.

P14.1 is the interrupt source selector (refer to interrupt). P14.3 is the speech acknowledge signal (refer to

speech synthesizer control).

IDLE OPERATION MODE

The IDLE operation mode suspends all CPU functions except the low-frequency clock oscillation and the

LCD driver. It keeps the internal status with low power consumption without stopping the slow clock

oscillator and LCD display.

LCD display is available for the IDLE operation mode. The high speed counter and speech synthesizer are

disabled in this mode. The IDLE operation mode will be wakeup and return to the SLOW operation mode by

the internal timing generator or I/O pins (P0(0..3)/WAKEUP 0..3 and P8(0..3)/WAKEUPA..D).

P19

32

10

IDME

SIDR

Initial value : 0000

IDME

01

**

Enable IDLE mode

Enable IDLE mode

no function

SIDR

00

01

10

11

Select IDLE releasing condition

P0(0..3), P8(0..3) pin input

P0(0..3), P8(0..3) pin input and 1 sec signal

P0(0..3), P8(0..3) pin input and 0.5 sec signal

P0(0..3), P8(0..3) pin input and 15.625 ms signal

STOP OPERATION MODE

The STOP operation mode suspends system operation and holds the internal status immediately before the

suspension with low power consumption. This mode will be released by reset or I/O pins (P0(0..3)/

WAKEUP 0..3 or P8(0..3)/WAKEUP A..D).

LCD display, high speed counter and speech synthesizer are disabled in this mode.

* This specification are subject to be changed without notice.

8.16.2001 17

Share Link: