EM73983 Ver la hoja de datos (PDF) - ELAN Microelectronics

Número de pieza

componentes Descripción

Fabricante

EM73983

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

ELAN Microelectronics 

EM73983

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

Preliminary

EM73983 speech synthesizer operates as following :

1. Send the speech start address to the address latch by writing P6 four times.

2. Choose the sampling rate, enable the speech synthesizer by writing P5.

3. The ROM address counters send the ROM address A6 .. A17 to the speech ROM.

4. ACT is the speech acknowledge signal. When the speech synthesizer has voice output. ACT is high .

When ACT is changed from high to low, the speech synthesizer can generate the speech ending

interrupt SPI. The ACT signal can be read from P5.3.

SPEECH SYNTHESIZER CONTROL

Speech sample rate control register (P5 write) :

3210

Initial value : *111

SR

SR Sample rate selection Sample rate

000 PWM on CLK/64/1/3

24K

port 5 -- initialization is "*111".

001

CLK/64/1/4

18K

port 6 -- initialization is pointed to the low-

010

CLK/64/2/3

12K

nibble of start address latch.

011

CLK/64/2/4

9K

100

CLK/64/3/3

8K

CLK=4.6 MHz

101

CLK/64/3/4

6K

111 PWM off

Speech active flag (P5 read) :

3210

ACT * * *

Initial value : 0***

ACT is the speech acknowledge signal. When the speech synthesizer has voice output, ACT is high. When

ACT is high → low, the speech synthesizer can generate the speech ending interrupt SPI.

Speech start address register (P6 write) :

3210

Port 6

Initial value : 1111

P6L1

P6L2

P6L3

P6L4

A9 A8 A7 A6 A13 A12 A11 A10 A17 A16 A15 A14 - - - -

Send the speech start address to the speech synthesizer by writing P6 four times. There is a pointer counter to

point the address latch (P6L1, P6L2, P6L3, P6L4). It will increase one when write P6. So, the first time

writing P6 to P6L1, the second time is P6L2, the third time is P6L3, the fourth time is P6L4 and the fifth time

is P6L1 latch again, ... etc. The pointer counter point to P6L1 when CPU is reset or P5 is writen.

In the NORMAL operation mode, the speech synthesizer is available. In the other operation modes, it is

disable.

* This specification are subject to be changed without notice.

10.31.2000 23

Share Link: