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HT45F75 Datasheet(PDF) 144 Page - Holtek Semiconductor Inc

Part # HT45F75
Description  Body Fat Scale Flash MCU
PDF  190 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F75 Datasheet(HTML) 144 Page - Holtek Semiconductor Inc

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Rev. 1.10
1��
De�e��e� 1�� �01�
Rev. 1.10
1�5
De�e��e� 1�� �01�
HT45F75
Body Fat Scale Flash MCU
HT45F75
Body Fat Scale Flash MCU
IR Modulation Interface
TheUARTinterfacehasanintegratedIRmodulationinterface.Infraredmodulationfrequency
controlbyregisterIRCTRL0,itsvalueisanyintegerbetween0and127.
UA RT
IR m o dul at io n
IR CT RL 0/ 1
RX
TX
Infraredmodulation:WhenTXD=0only,theIRmodulationwillproduceinfraredmixingandoutput
data.TomeettheneedsofbothPNPandNPNinfrareddrivertube,locatedintheregisterIRCTRL0
bit7IRTC,controlthepolarityoftheoutputoftheinfraredmodulation.IRTC=0forpositivepolarity
output,suitableforPNPtransistordriver;IRTC=1foranegativeoutput,suitablefortheNPNdriver.
Seebelow:
F�a��y
TXD
IR TXD
(IRTC=0)
IR TXD
(IRTC=1)
1
0
0
0
00
11
1
11
1
0
IRCTRL0 Register
Bit
7
6
5
4
3
2
1
0
Na�e
IRTC
IRDC�
IRDC5
IRDC�
IRDC3
IRDC�
IRDC1
IRDC0
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
Bit7
IRTC:IRmodulationoutputpolarityselect
0:Negative
1:Positive
Bit6~0
IRDC6~IRDC0:IRmodulationfrequencydividercoefficient
Fcarry=(fSYS/(IRDC+1))/2
IRCTRL1 Register
Bit
7
6
5
4
3
2
1
0
Na�e
—
—
—
—
—
—
—
IRME0
R/W
—
—
—
—
—
—
—
R/W
POR
—
—
—
—
—
—
—
0
Bit7~1
Unimplemented,readas“0”
Bit0
IRME0:UARTTXIRmodulationcontrol
0:UARTTXIRmodulationdisable
1:UARTTXIRmodulationenable



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