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| 型号： | EM73MA89B |
| 英文描述： | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R |
| 中文描述： | 4，液晶产品位微控制器 |
| 文件页数： | 28/64页 |
| 文件大小： | 331K |
| 代理商： | EM73MA89B |
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34
* This specification are subject to be changed without notice.
10.15.2002 (V1.3)
EM73MA89B
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary
SPEECH SYNTHESIZER
Block diagram of speech and sound effect
P12,13 Write
P24 Write
P23 Write
P11 Read
Sound effect generator
Set tone freq.
P20 Write
Set melody mode
P17 Write
Set tone amplitude
PWM
speech
decoder
speech
ROM
BZ1/VO
BZ2
Set speech address
(write 4 times)
P11 Write
Set data address
(write 5 times)
Read data
Set sample rate
P14.3 read
Speech active
SPI interrupt
D/A
EM73MA89B speech synthesizer operates as following :
1. Send the speech start address to the address latch by writing P24 four times.
2. Choose the sampling rate, enable the speech synthesizer by writing P23.
3. The ROM address counters send the ROM address A6 .. A19 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 P14.3.
SPEECH SYNTHESIZER CONTROL
Speech sample rate control register (P23 write) :
P23
3
2
1
0
Initial value : 1111
SR
SR
Sample rate selection
0000
CLK/64/2/3
port 23 -- initialization is "1111".
0001
CLK/64/2/4
port 24 -- initialization is pointed to the low-
0010
CLK/64/3/3
nibble of start address latch.
0011
CLK/64/3/4
0100
CLK/64/2/7
The frequency of CLK is decided by mask option.
0101
CLK/64/4/4
0110
CLK/64/6/3
0111
CLK/64/6/4
1***
Disable speech
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