L9945 datasheet(77/144 Pages) STMICROELECTRONICS

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RESPONSE 3

Frame partitioning

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10

Description:

OUT3 configuration, H-Bridge 1 current limitation enable and active freewheeling, gate charge/

discharge current override

Reset

0x3BC00000

[31:28] C: Reponse to command 3

Reset: 0011

Reset Condition: POR, NRES

[27] R/W: Bit to read/write configuration

0: Write & request read

1: Request read only

Reset: 1

Reset Condition: POR, NRES

[26] HB1_ILIM_EN: H-bridge1 current limit activation. CH3 OC threshold is used for current limitation, it is only valid for Shunt

measurement

0: Current limitation not active

1: Current limitation active

Reset: 0

Reset Condition: POR, NRES

[25] HB1_AFW: H-bridge1 active freewheel configuration on LS

0: Freewheel low

1: Active freewheeling

Reset: 1

Reset Condition: POR, NRES

[24] GCC_OVERRIDE_CONFIG: GCC configuration of the channel, regardless of its channels configuration (LS.HS,H-bridge)

must be override to a higher GCC configuration upon OC detection. GCC configuration will remain active until next (NON+SPI)

internal turn off transition, in which case the override will be cleared

0: GCC override function upon OC detection:

1 mA → 5 mA

5 mA → 20 mA

1: GCC override function upon OC detection:

1 mA → 20 mA

5 mA → 20 mA

Reset: 1

Reset Condition: POR, NRES

L9945

Functional description

DS12275 - Rev 10

page 77/144

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