ST7FMC2N6B6(2004) 查看數據表（PDF） - STMicroelectronics

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ST7FMC2N6B6
(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)

MOTOR CURRENT FEEDBACK

(MCFR)

Read/Write

Reset Value: 0000 0000 (00h)

REGISTER

7

6

5

4

3

2

1

0

RPGS RST CFF2 CFF1 CFF1 CFW2 CFW1 CFW0

Bit 7= RPGS: Register Page Selection:

0: Access to registers mapped in page 0

1: Access to registers mapped in page 1

Bit 6= RST: Reset MTC registers.

Software can set this bit to reset all MTC registers

without resetting the ST7.

0: No MTC register reset

1: Reset all MTC registers

Bits 5:3 = CFF[2:0]: Current Feedback Filter bits

These bits select the number of consecutive valid

samples (when the current is above the limit)

needed to generate the active event. Sampling is

done at fPERIPH/4.

Table 68. Current Feedback Filter Setting

CFF2 CFF1 CFF0 Current Feedback Samples

0

0

0

1

0

0

1

2

0

1

0

3

0

1

1

4

1

0

0

5

1

0

1

6

1

1

0

7

1

1

1

8

Bits 2:0 = CFW[2:0]: Current Window Filter bits:

These bits select the length of the blanking win-

dow activated each time PWM is turned ON. The

filter blanks the output of the current comparator.

Table 69. Current Feedback Window Setting

CFW2 CFW1 CFW0

Blanking Window

0

0

0

Blanking window off

0

0

1

0.5µs

0

1

0

1µs

0

1

1

1.5µs

1

0

0

2µs

1

0

1

2.5µs

1

1

0

3µs

1

1

1

3.5µs

Note: Times are indicated for 4 MHz fPERIPH

211/294

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