ST7MC2S4 STMicroelectronics, ST7MC2S4 Datasheet - Page 154

• Manufacturer Part Number: ST7MC2S4
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC,BRUSHLESS MOTOR CONTROL, 5 TIMERS, SPI, LINSCI(TM)
• Manufacturer: STMicroelectronics

ST7MC1xx/ST7MC2xx
MOTOR CONTROLLER (Cont’d)
Table 31. Demagnetisation (D) Event Generation (example for ZVD=0)
154/309
1
(*) Note: This is a zoom to the additional voltage induced by the rotor (Back EMF)
HDM
bit
0
1
Hardware/Simulat-
(SDM bit = 1 and
Simulated Mode
(SDM bit =1 and
HDM bit = 0)
HDM bit = 1)
Meaning
ed Mode
HVV
HV/2
HV
HV/2
D
motor parasite or first
motor parasite or first
0V
0V
H
Undershoot due to
Undershoot due to
(Hardware detection or Output compare true)
sampling
sampling
Σ
Σ
2
2
D
D
S
S
D = D
Z
Z
D = D
CPB bit = 1
C
C
S
(*)
(*)
H
H
= Output Compare [MDREG, MTIM registers]
H
+ D
HV
HV/2
HV
HV/2
0V
0V
S
undershoot and
undershoot and
BEMF positive
BEMF positive
Weak / null
Weak / null
Z
Z
Σ
Σ
2
2
D
D
S
S
C
C
(*)
(*)
H
H
HVV
HV/2
(Hardware detection only)
HV
HV/2
D
0V
0V
H
CPB bit = 0
Z
Z
D = D
Σ
Σ
5
5
C
C
D
H
H
S
H
(*)
(*)