HT45FM2C datasheet(75/171 Pages) HOLTEK

75 / 171 page

Rev. 1.10

�a� �0� �01�

Rev. 1.10

�a� �0� �01�

HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

Preliminar�

16-bit CTM, PWM Mode, Edge-aligned Mode, TnDPX=0

CCRP

1~255

Period

CCRP

×�56

655�6

Dut�

CCRA

If fSYS=16MHz,TMclocksourceisfSYS/4,CCRP=2andCCRA=128,

The CTM PWM output frequency=(fSYS/4)/(2×256)=fSYS/2048=7.8125 kHz, duty=128/

(2×256)=25%.

IftheDutyvaluedefinedbytheCCRAregisterisequaltoorgreaterthanthePeriodvalue,thenthe

PWMoutputdutyis100%.

16-bit CTM, PWM Mode, Edge-aligned Mode, TnDPX=1

CCRP

1~255

Period

CCRA

Dut�

CCRP

×�56

655�6

ThePWMoutputperiodisdeterminedbytheCCRAregistervaluetogetherwiththeTMclock

whilethePWMdutycycleisdefinedbythe(CCRP×256)exceptwhentheCCRPvalueisequalto0.

Counter Value

CCRP

CCRA

TnON

TnPAU

TnPOL

CCRP Int.

Flag TnPF

CCRA Int.

Flag TnAF

T� O/P Pin

(TnOC=1)

Time

Counter cleared

b� CCRP

Pause

Resume

Counter Stop if

TnON bit low

Counter Reset when

TnON returns high

TnDPX = 0; Tn� [1:0] = 10

PW� Dut� C�cle

set b� CCRA

PW� resumes

operation

Output controlled b�

other pin-shared function

Output Inverts

when TnPOL = 1

PW� Period

set b� CCRP

T� O/P Pin

(TnOC=0)

PWM Mode – TnDPX=0

Note:1.HereTnDPX=0–CounterclearedbyCCRP

2.AcounterclearsetsthePWMPeriod

3.TheinternalPWMfunctioncontinuesevenwhenTnIO[1:0]=00or01

4.TheTnCCLRbithasnoinfluenceonPWMoperation

5.n=0,1,2,3,5

HT45FM2C Datasheet(PDF) 75 Page - Holtek Semiconductor Inc

HT45FM2C Datasheet(HTML) 75 Page - Holtek Semiconductor Inc

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