L9945 datasheet(60/144 Pages) STMICROELECTRONICS

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COMMAND 7

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

OUT7 configuration, H-Bridge 2 current limitation enable and active freewheeling

[31:28] C: Command 7

0111

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

0: Write & request read

1: Request read only

[26] HB2_ILIM_EN: H-bridge2 current limit activation. CH7 OC threshold is used for current limitation, only valid with Shunt

measurement

0: Current limitation not active

1: Current limitation active

[25] HB2_AFW: H-bridge2 active freewheel configuration on LS

0: Passive freewheeling

1: Active freewheeling

[24] FIXED_PATTERN

[23:22] TDIAG_CONFIG_07: OFF state diagnostic blanking/filter timer for output 07. It has no effect if HB2_config =1 &

HB2_tdiag_ext_config = 0.

00: 25.6 µs

01: 61.2 µs

10: 105.6 µs

11: 150 µs

[21] OC_READ_07: Selection of the OC threshold to read. Fixed threshold or actual threshold.

0: Read fixed OC threshold

1: Read actual OC threshold

[20:15] OC_CONFIG_07: Selection of over current detection threshold. 6 bit to code for the OC detection threshold

See Table 40

[14:13] OC_TEMP_COMP_07: Over current detection with temperature compensation (see note of Table 30. SPI MOSI list)

00: No OC compensation

01: ΔT < 60 °C

10: ΔT < 40 °C

11: ΔT < 25 °C

[12] OC_BATT_COMP_07: Over current detection with battery compensation

0: Battery compensation de-activated

1: Battery compensation activated

L9945

Functional description

DS12275 - Rev 10

page 60/144

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