L9300 datasheet(40/178 Pages) STMICROELECTRONICS

40 / 178 page

8.5.4

WSI error handling

Table 16. WSI type of error

Type of error

Detection

condition

Action

Clear SPI

flag

Restart condition

Tracking Configuration

TRK out of regulation

ON state

Set TRK_OUT_OF_REGULATION SPI flag (3:0) in TRK-

CAN FAULT register

On read

N.A.

TRK reverse current

ON state

TRK internal path to VDD1 open,

TRK_REVERSE_CURRENT SPI flag (10:7) latched in

TRK-CAN FAULT register

On read

Automatic restart

when fault

disappears.

TRK overtemperature

ON state

No action if out of regulation is not triggered; output

disabled, and T_SD_TRK SPI fault bit (5) latched

otherwise in TRK-CAN FAULT register

On read

Automatic restart with

slope control after OT

fault disappears.

Wheel Speed Sensor Configuration

Short to ground, current

limitation

ON state

STG SPI fault (9) latched in WSIRSDRx register.

On read

N.A.

Short to battery

ON state

STB SPI fault (8) latched in WSIRSDRx register. Sensor

supply disconnected to avoid reverse current flow

On read

Automatic restart after

fault disappears.

Leakage to battery

ON state channel

enabled

OPENDET SPI fault (6) latched in WSIRSDRx register

On read

N.A.

Leakage to GND

ON state channel

enabled

CURRENT HI SPI fault (7) latched in WSIRSDRx register

On read

N.A.

Parity error, invalid data

ON state channel

enabled, VDA

sensor only

INVALID SPI fault (4) latched in WSIRSDRx register

On read

N.A.

No decoding data

ON state channel

enabled, VDA

sensor only

NODATA SPI fault (3) latched in WSIRSDRx register

On read

N.A.

Pulse duration counter

overflow

ON state channel

enabled, PWM

sensor only

PULSE OVERFLOW SPI fault (2) latched in WSIRSDRx

On read

N.A.

ON state

WSITEMP fault (5) latched in WSIRSDRx register and

output disabled if STG fault is triggered; no action

otherwise

On read

Wheel Speed supply

automatic restart after

fault disappears.

Clear STG and

WSITEMP faults and

re-enable the faulted

channel to enable

algorithm and digital

outputs.

L9300

Power supply

DS12258 - Rev 5

page 40/178

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