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參數(shù)資料
| 型號： | HE84G770B |
| 廠商： | King Billion Electronics Co., Ltd. |
| 英文描述： | 8-BIT MICRO-CONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 44/61頁 |
| 文件大?。?/td> | 817K |
| 代理商： | HE84G770B |
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King Billion Electronics Co., Ltd
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億
電
子
股
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公
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HE84G770
HE80004H SERIES
October 31, 2003
This specification is subject to change without notice. Please contact sales person for the latest version before use.
44
Version:V1.1
PWM
Command
Register
#reset
VOC[2]
PWMC[6..0]
clk
PWMC[7]
Write_Strobe
PWMC_
REG[0]
PWM
Driver
PWMC_REG[6..4]
#reset
clk
7-bit
PWM Data
Register
clk
Fast_clock
PWMO_REG[6..0]
PWM
PWM_GND
VO/
DAO
7-bit Voice Output Architecture
DAC
VOC[1]
VOC[0]
The fast clock is used to provide as PWM driver time base, and user shall set the PWMC[7]=’1’ and
VOC[2]=’1’ to enable the PWM output. When the system enters into sleep or idle mode, it will
automatically turn off the voice device by clearing VOC[2:0] to ”000”. In order to activate voice output
again when the system returns and enter into normal mode, the related bits of VOC register need to be set
again.
Data=0x40h
Data=0x10h
Data=0x70h
subframe
PWM
When the DAC is used as sound generator, the bias & filter circuit is used for bias voltage setting and
waveform filter regulation and the DAC is output to the VO (Voice Output) pin and please see application
notes for detailed calculation example and application. The driving capability of DAC is shown below.
Condition
Min.
2.5
Typ.
3
Max.
Unit
mA
VO/DAO
V
DD
=3V;VO=0~2V;Data=7Fh
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