HE83005 Datasheet, PDF (10/23 Pages) King blillion Electronics Co.,Ltd. – 8-BIT MICRO-CONTROLLER

King Billion Electronics Co., Ltd
駿億電子股份有限公司
VOC
VOC[2]
0
0
1
1
VOC[1]
0
1
0
1
Output Function
All Disabled
VO
PWM
PWM+VO
HE83005
HE80000 SERIES
PWMC register
Bit 7
DAC & PWM Data 0
Control
1
Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1
DAC and PWM output value
PWM O/P driver
Reserved
Bit 0
PWME
In the PWMC register, the PWMC[7] bit determines the written PWMC[6..0] value is PWM/DAC data or
commands. If the PWMC[1] is ‘0’, the PWMC[6..0] is stored into the data register, otherwise
PWMC[6..0] is stored into command register shown on the above diagram. The command register
controls the PWM output driver current and its enable/disable. If user want to enable the PWM function,
both VOC[2] and PWME bits shall be set to ‘1’.
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 enters into normal mode, the related bits of VOC register need to be
set again.
PWM
Data=0x40h
Data=0x10h
Data=0x70h
subframe
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. Typ. Max. Unit
July 28, 2003
10
V3.4
This specification is subject to change without notice. Please contact sales person for the latest version before use.