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HT45F3W Datasheet(PDF) 113 Page - Holtek Semiconductor Inc

Part # HT45F3W
Description  HT45F3W
PDF  167 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F3W Datasheet(HTML) 113 Page - Holtek Semiconductor Inc

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Rev. 1.50
11�
De�e��e� 01� �01�
Rev. 1.50
113
De�e��e� 01� �01�
HT45F3W
R-Type Blood Pressure Meter Flash MCU
HT45F3W
R-Type Blood Pressure Meter Flash MCU
Digital to Analog Converter – DAC
Thedeviceincludesa16-bitDigitaltoAnalogConverterfunction.Thisfunctionallowsdigitaldata
containedinthedevicetogenerateaudiosignals.
DAC Operation
ThevoicedatamustbewrittenintoregistersDALandDAH.Theaudiooutputswillbewritteninto
thehighernibbleofDALandthewholebyteofDAH,andtheDAL3~DAL0isunimplemented
andalwaysreadas“0H”.Thereare8scalesofvolumecontrollablelevelthatareprovidedforthe
voltagetypeDACoutput.Theprogrammercanchangethevolumebyonlywritingthevolume
controldatatothehigher-nibbleoftheVOL,andthelower-nibbleofVOLisalwaysreadas“0H”.
ThevoicecontrolbitDACENinCTRL2controlsDACcircuitenable/disable.IftheDACcircuit
isnotenabled,anyDAH/DALoutputisinvalid.Writinga“1”toDACENbitistoenableDAC
circuit,andwritinga“0”toDACENbitistodisableDACcircuit.
CTRL2 Register
Bit
7
6
5
4
3
2
1
0
Na�e
DACEN
CPDEN INT1ES1 INT1ES0 INT0ES1 INT0ES0
CPF
—
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
—
POR
0
0
1
0
1
0
0
—
Bit7
DACEN:DACdisable/enablecontrol
0:DACdisable
1:DACenable
TheDACcircuitisdisabledwhensystementerstheHALTmode.
Bit6~0
Describedelsewhere
DAL Register
Bit
7
6
5
4
3
2
1
0
Na�e
DA3
DA�
DA1
DA0
—
—
—
—
R/W
R/W
R/W
R/W
R/W
—
—
—
—
POR
0
0
0
0
—
—
—
—
DAH Register
Bit
7
6
5
4
3
2
1
0
Na�e
DA11
DA10
DA9
DA8
DA7
DA�
DA5
DA4
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
POR
0
0
0
0
0
0
0
0



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