參數(shù)資料
型號(hào)： HE85750
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(yè)數(shù)： 16/23頁(yè)
文件大?。?/td> 399K
代理商： HE85750
King Billion Electronics Co., Ltd
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HE85750
HE80000 SERIES
There are two output paths for the DAC. Either VO or DAO can be selected as output port of DAC by
VOC register when it is enabled. The VO output is primarily intended for speech generation, although it
is not necessary so, while the DAO output path can be used in conjunction with built-in OP comparator to
function as an Analog-to-Digital Converter as required in applications such as speech recording, speech
recognition or sensor interfaces.
2003/7/30
This specification is subject to change without notice. Please contact sales person for the latest version before use.
16
V1.52E
OPO
OPIP
OPIN
DAO
PWMC[DATA]
VO
VOC[DAC]
VOC[OP]
R
DAC
+
-
1
0
OP
The DAC is enabled by DAC bit of VOC register. Please note that the DAC bit of VOC register will be
automatically cleared when the system enter Idle or Sleep mode. So it needs to be set again when
returning to Normal mode.
VOC
Register
VOC register
Field
Reset
Bit 7
-
-
Bit 6
-
-
Bit 5
-
-
Bit 4
-
-
Bit 3
-
-
Bit 2
PWM
0
Bit 1
DAC
0
Bit 0
OP
0
Bit Name Value
Function description
DA Enable
DA Disable
1
0
1
DAC
15.
Pulse-Width Modulation
The pulse-width modulator (PWM) converts 7-bit unsigned speech data written to PWMC data register to
proportional duty cycle of PWM output. PWM module shares the PWMC data register with
Digit-to-Analog Converter. So PWM and DA output can exist at the same time. When PWM circuit is
enabled, it generates signal with duty ratio in proportion to the DA value.
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