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HT45F4M Datasheet(PDF) 104 Page - Holtek Semiconductor Inc

Part # HT45F4M
Description  Lithium Battery Backup Power ASSP MCU
PDF  138 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45F4M Datasheet(HTML) 104 Page - Holtek Semiconductor Inc

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Rev. 1.10
104
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Rev. 1.10
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HT45F4M
Lithium Battery Backup Power ASSP MCU
HT45F4M
Lithium Battery Backup Power ASSP MCU
OCP Operational Amplifier Offset Cancellation Function
OPAallowsforacommodemodeadjustmentmethodofitsinputoffsetvoltage.
ARS
AOFM
S1
S2
S3
0
0
ON
ON
OFF
0
1
OFF
ON
ON
1
0
ON
ON
OFF
1
1
ON
OFF
ON
S1
S2
S3
A
O PA + in put
O PA - in pu t
OP A ou tp ut
AO F0 ~A OF 5, O CP EN
Thecalibrationstepsareasfollowing:
• SetAOFM=1tosetuptheoffsetcancellationmode,hereS3isclosed
• SetARStoselectwhichinputpinistobeusedasthereferencevoltage–S1orS2isclosed
• AdjustAOF0~AOF5untiltheoutputstatuschanges
• SetAOFM=0torestorethenormalOPAmode
OCP Comparator Offset Cancellation Function
CMPallowsforacommodemodeadjustmentmethodofitsinputoffsetvoltage.
CARS
CAOFM
S1
S2
S3
0
0
ON
ON
OFF
0
1
OFF
ON
ON
1
0
ON
ON
OFF
1
1
ON
OFF
ON
S1
S2
S3
CA
Co mp ar at or A + i n put
Co mp ar at or A - i nput
Co mp ar at or A o ut pu t
CA OF 0~ CA OF 5, O CP EN
Thecalibrationstepsareasfollowing:
• SetCAOFM=1tosetuptheoffsetcancellationmode,hereS3isclosed
• SetCARStoselectwhichinputpinistobeusedasthereferencevoltage–S1orS2isclosed
• AdjustCAOF0~CAOF5untiltheoutputstatuschanges
• SetCAOFM=0torestorethenormalComparatorAmode



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