ST92141 datasheet(127/179 Pages) STMICROELECTRONICS

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ST92141 - 3-PHASE INDUCTION MOTOR CONTROLLER (IMC)

INDUCTION MOTOR CONTROLLER (Cont’d)

TACHO

PRESCALER

HIGH

(TPRSH)

R244 - Read/Write

Reset Value: 0000 0000 (00h)

Bit 7:4 = Reserved.

Bit 3:0 = TPRH[3:0]

Most Significant Bits of tacho

prescaler value (N).

TACHO PRESCALER REGISTER LOW (TPRSL)

R245 - Read/Write

Reset Value: 0000 0000 (00h)

Bit 7:0 = TPRL[7:0]

Low byte of tacho prescaler

value (N).

If N = 0 Tacho Prescaler divides by 1.

PWM

COUNTER

PRESCALER

(CPRS)

R246 - Read/Write

Reset Value: 0000 0000 (00h)

Bit 7:0 = CPR[7:0]

PWM counter prescaler value

(N).

This value divides the INTCLK frequency by (N

+1), i.e. if N = 0, INTCLK is divided by 1.

REPETITION COUNTER REGISTER (REP)

R247 - Read/Write

Reset Value: 0000 0000 (00h)

Bit 7:0 = REP[7:0]

Repetition counter value (N).

If N = 0, each time the PWM Counter reaches ze-

ro, the Compare registers are updated and an

ADT interrupt is generated.

---

TPRH

TPRL

CPR7 CPR6 CPR5 CPR4 CPR3 CPR2 CPR1 CPR0

REP7 REP6 REP5 REP4 REP3 REP2 REP1 REP0

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