參數(shù)資料
型號： HE84G761(S)
文件頁數(shù)： 36/52頁
文件大?。?/td> 631K
代理商： HE84G761(S)
KING BILLION ELECTRONICS CO., LTD
駿
億
電
子
股
份
有
限
公
司
HE84G761
HE80004 Series
June 30, 2003
This specification is subject to change without notice. Please contact sales person for the latest version before use.
36
V1.01
CLK
CLK
7 bit data
register
PWMC[6..0]
DAC
PWM
command
register
PWMC
_REG[0]
VOC[2]
reset
_____
cp
reset
_____
PWMC_REG[6..4]
PWMC_REG[3..1]
PWM
Driver
PWMP
PWMN
PWM_O[6..0]
PWMC[6..0]
PWMC[7]
Register.write.strobe
Fast clock
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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