MCT8317A datasheet(74/161 Pages) TI1

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Table 8-11. ISD_CONFIG Register Field Descriptions (continued)

Bit

Field

Type

Reset

Description

BRK_MODE

R/W

Brake mode

0h = All three low-side FETs turned ON

1h = All three high-side FETs turned ON

RESERVED

R/W

Reserved

19-17

RESERVED

R/W

Reserved

16-13

BRK_TIME

R/W

Brake time

0h = 10 ms

1h = 50 ms

2h = 100 ms

3h = 200 ms

4h = 300 ms

5h = 400 ms

6h = 500 ms

7h = 750 ms

8h = 1 s

9h = 2 s

Ah = 3 s

Bh = 4 s

Ch = 5 s

Dh = 7.5 s

Eh = 10 s

Fh = 15 s

12-9

HIZ_TIME

R/W

Hi-Z time

0h = 10 ms

1h = 50 ms

2h = 100 ms

3h = 200 ms

4h = 300 ms

5h = 400 ms

6h = 500 ms

7h = 750 ms

8h = 1 s

9h = 2 s

Ah = 3 s

Bh = 4 s

Ch = 5 s

Dh = 7.5 s

Eh = 10 s

Fh = 15 s

8-6

STARTUP_BRK_TIME

R/W

Brake time when motor is stationary

0h = 1 ms

1h = 10 ms

2h = 25 ms

3h = 50 ms

4h = 100 ms

5h = 250 ms

6h = 500 ms

7h = 1000 ms

5-3

RESYNC_MIN_THRESH

OLD

R/W

Minimum phase BEMF below which the motor is coasted instead of

resync

0h = computed based on MIN_DUTY

1h = 300 mV

2h = 400 mV

3h = 500 mV

4h = 600 mV

5h = 800 mV

6h = 1000 mV

7h = 1250 mV

2-1

MTR_STARTUP

R/W

Motor start-up method

0h = Align

1h = Double Align

2h = IPD

3h = Slow first cycle

MCT8317A

SLLSFQ2 – JANUARY 2023

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