HT45FM2C datasheet(97/171 Pages) HOLTEK

97 / 171 page

Rev. 1.10

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Rev. 1.10

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HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

Preliminar�

Over-current Detection

Thedevicecontainsanfullyintegratedover-currentdetectcircuitwhichisusedformotor

protection.

OPCM

Int_Is

OPA : Av=1/5/10/20

DAC

8-bit

OPA

Comparator 0

Int_AD_EOC

Int_AHL_ Lim

ADC

ADR

EOC

AD HL/LV

Trigger

Int

Trigger

C0BPE

ADLVD/ADHVD

Over-current Detector Block Diagram

Over-current Functional Description

Theover-currentfunctionalblockincludesanamplifier,10-bitA/DConverter,8-bitD/AConverter

andcomparator.Ifanover-currentsituationisdetectedthenthemotorexternaldrivecircuitcanbe

switchedoffimmediatelytopreventdamagetothemotor.Twokindsofinterruptsaregenerated

whichcanbeusedforover-currentdetection.

1.A/DConverterinterrupt-Int_AHL_Lim

2.Comparator0interrupt-Int_Is

Over-current Register Description

Therearethreeregisterstocontrolthefunctionandoperationoftheovercurrentdetectioncircuits,

knownasOPOMS,OPCMandOPACAL.These8-bitregistersdefinefunctionssuchastheOPA

operationmodeselection,OPAcalibrationandcomparison.OPCMisan8-bitDACregisterusedfor

OPAcomparison.

HT45FM2C Datasheet(PDF) 97 Page - Holtek Semiconductor Inc

HT45FM2C Datasheet(HTML) 97 Page - Holtek Semiconductor Inc

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