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HT45FM2C Datasheet(PDF) 103 Page - Holtek Semiconductor Inc

Part # HT45FM2C
Description  Brushless DC Motor Flash Type 8-Bit MCU
PDF  171 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT45FM2C Datasheet(HTML) 103 Page - Holtek Semiconductor Inc

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Rev. 1.10
10�
�a� �0� �01�
Rev. 1.10
10�
�a� �0� �01�
HT45FM2C
Brushless DC Motor Flash Type 8-Bit MCU
HT45FM2C
Brushless DC Motor Flash Type 8-Bit MCU
Preliminar�
PWM Register Description
OverallPWMoperationiscontrolledbyaseriesofregisters.TheDUTRL/DUTRHregisterpair
isusedforPWMdutycontrolforadjustmentofthemotoroutputpower.ThePRDRL/PRDRH
registerpairareusedtogethertoforma10-bitvaluetosetupthePWMperiodforPWMFrequency
adjustment.BeingabletochangethePWMfrequencyisusefulformotorcharacteristicmatching
forproblemssuchasnoisereductionandresonance.ThePWMRL/PWMRHregistersareusedto
monitorthePWMcounterdynamically.ThePWMONbitinthePWMCregisteristhe10-bitPWM
counteron/offbit.ThePWMclocksourceforthePWMcountercanbeselectedbyPCKS1~PCKS0
bitsinthePWMCregister.ItshouldbenotedthattheorderofwritingdatatoPWMregisterisMSB.
PWMC Register
Bit
7
6
5
4
3
2
1
0
Name
—
—
PCKS1
PCKS0
PW�ON
—
—
GATSEL
R/W
—
—
R/W
R/W
R/W
—
—
R/W
POR
—
—
0
0
0
—
—
0
Bit7~6
Unimplemented,readas"0"
Bit 5~4
PCKS1, PCKS0:
ClocksourceofthePWMcounterselect
000: fPWM,PWMfrequencyMin.=20kHz,fPWMbaseon20MHz
001: fPWM/2,PWMfrequencyMin.=10kHz
010: fPWM/4,PWMfrequencyMin.=5kHz
011: fPWM/8,PWMfrequencyMin.=2.5kHz
Bit 3
PWMON:
PWMCircuitOn/Offcontrol
0: Off
1: On
Thisbitcontrolstheoverallon/offfunctionofthePWM.Settingthebithighenables
thecountertorun,clearingthebitdisablesthePWM.Clearingthisbittozerowill
stopthecounterfromcountingandturnoffthePWMwhichwillreduceitspower
consumption.
Bit2~1
Unimplemented,readas"0"
Bit 0
GATSEL:
GATEDriveroutputselect
0:GAT/GAB/GBT/GBB/GCT/GCBareusedforGatedriveroutputpins
1:GAT/GAB/GBT/GBB/GCT/GCBareusedasPC[5:0]
DUTRL Register
Bit
7
6
5
4
3
2
1
0
Name
D7
D6
D5
D4
D�
D�
D1
D0
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
Bit7~0
10-bitPWMDutyregisterlowbyteregisterbit7~bit0
10-bitDUTRregisterbit7~bit0



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