ST7PMC2N6B6(2004) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

ST7PMC2N6B6
(Rev.:2004)

8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, BRUSHLESS MOTOR CONTROL, FIVE TIMERS, SPI, LINSCI™

STMicroelectronics 

ST7MC1/ST7MC2

MOTOR CONTROLLER (Cont’d)

Table

HDM

bit

31. Demagnetisation

Meaning

(D) Event

CPB bit = 1

CPB bit = 0

D = DS = Output Compare [MDREG, MTIM registers]

Undershoot due to

Weak / null

motor parasite or first

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)

Generation (example for ZVD=0)

0V

DH Z

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