ST7FMC1M2T3 查看數據表（PDF） - STMicroelectronics
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ST7FMC1M2T3
STMicroelectronics
ST7FMC1M2T3 Datasheet PDF : 309 Pages
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ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
Table 31. Demagnetisation (D) Event Generation (example for ZVD=0)
HDM
bit
Meaning
CPB bit = 1
CPB bit = 0
D = DS = Output Compare [MDREG, MTIM registers]
Undershoot due to
motor parasite or first
Weak / null
undershoot and
sampling
BEMF positive
Σ2
Σ2
Σ5
HVV
HV
CH
HVV
DS
Simulated Mode
0
(SDM bit =1 and
HDM bit = 0)
DS
(*)
DS CH
CH
HV/2
HV/2
HV/2
(*)
(*)
0V
0V
Z
Z
0V
Z
D = DH + DS
(Hardware detection or Output compare true)
Undershoot due to
motor parasite or first
Weak / null
undershoot and
sampling
Σ2
BEMF positive
Σ2
D = DH
(Hardware detection only)
Σ5
HV
Hardware/Simulat-
ed Mode
1
(SDM bit = 1 and
HDM bit = 1)
HV/2
HV
CH
DS
(*)
HV/2
HV
DS CH
HV/2
CH
(*)
(*)
0V
0V
DH
Z
Z
(*) Note: This is a zoom to the additional voltage induced by the rotor (Back EMF)
0V
DH Z
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