Rev. 1.00
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HT66FM5440
Brushless DC Motor A/D Flash MCU
HT66FM5440
Brushless DC Motor A/D Flash MCU
PWM co�nter
HAT~HCB ×6
S1
S�
S3
S4
S5
S6
15KHz
~64 �s
GAT~GCB (×6)
(PWMO)
Time
Int_ADC
MOS C�rrent Limiting Protection: (AHLHE=1; AHLPS=1)
Start the next cycle of PWM o�tp�t a�tomatically by hardware
Int_ADC
PWM co�nter
HAT~HCB ×6
S1
S�
S3
S4
S5
S6
15KHz
~64 �s
GAT~GCB (×6)
(PWMO)
Time
Int_CMP
MOS Over C�rrent Protection: (ISHE=1; ISPS=0)
PWM o�tp�t m�st be restarted by software
Int_CMP
Current Protection Timing
Motor Stall Detection Function
For 3-phase BLDC applications with Hall Sensors, the 16-bit CAPTM can be used to monitor
the H1, H2 and H3 inputs for rotor speed detection. The software will setup the CAPTMAH and
CAPTMAL registers to monitor the Hall sensor input pins H1, H2 and H3 for rotor speed control. If
an abnormal situation exists, a CapTM_Cmp or CapTM_Over interrupt will be generated, which is
described in the CAPTM section.
Stall Detrect Mechanism CapTM_Cmp: when CapCHE=0 disable the hardware mode, and when
CapCHE=1 enable the hadware mode. The stall detect mechanism must use the Pause Mode.
CAPOPS=1, then select the Pause Mode.
Stall Detrect Mechanism CapTM_Over
:
when CapOHE=0 disable the hardware mode, and when
CapOHE =1 enable the hardware Mode. CAPOPS=1, then select the Pause Mode.