21

* This specification are subject to be changed without notice.

EM73880

EM73880

EM73880

EM73880

EM73880

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

4-BIT MICRO-CONTROLLER FOR LCD PRODUCT

11.30.2001

Preliminary

Preliminary

Preliminary

Preliminary

Preliminary

SPEECH SYNTHESIZER CONTROL

SPEECH SYNTHESIZER CONTROL

SPEECH SYNTHESIZER CONTROL

SPEECH SYNTHESIZER CONTROL

SPEECH SYNTHESIZER CONTROL

Speech sample rate control register (P5 write) :

3210

Initial value : *000

SINT

SR

SR

SR

SR

SR

SR

Sample rate selection

Sample rate selection

Sample rate selection

Sample rate selection

Sample rate selection

Sample rate

Sample rate

Sample rate

Sample rate

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

SINT

Select interrupt source

0

Select HTC overflow interrupt

1

Select speech ending interrupt

Speech active flag (P5 read) :

3210

Initial value : 0***

ACT

*

*

*

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, or when HTC

overflow interrupt SPI.

Speech start address register (P6 write) :

3210

Initial value : 1111

Port 6

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.