L9924L datasheet(47/84 Pages) STMICROELECTRONICS

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L9924L

Warning, alarms and faults

As general approach, the device provides embedded and automatic safety checks: in this

way any critical condition is automatically managed by hardware without the need of the

application software that has the task to signal the event and to apply, if possible, the proper

restore procedure or to keep the system in a safe status.

5.1

System error flags

The following events, signaled in SPI read register 0x12 [12.4.5] are foreseen:

Table 32. System error flags

Bit

Description

Action

EXTP_OC

Excitation overcurrent [4.3.10]

HW and SW

This flag has an effect also on CP_LOW bit

THSD

Overtemperature

None

PHO_OC

Phase out overcurrent [4.3.18]

HW and SW

CP_LOW

Charge pump low voltage [4.3.19]

HW and SW

APLUS_OV

Battery overvoltage [4.3.1]

HW and SW

APLUS_UV

Battery undervoltage [4.3.1]

None

LIN_PERM_DOM LIN Permanent Dominant

HW and SW

LIN_TXD_DOM

LIN Dominant TXD

HW and SW

LIN_PERM_REC LIN Permanent Recessive

HW and SW

DFM_OC

DFM overcurrent [4.3.6]

HW and SW

L_HS_OC

L High-side overcurrent [4.3.13]

HW and SW

L_LS_OC

L Low-side overcurrent [4.3.15]

HW and SW

LHC_HS_OC

LHC High-side overcurrent [4.3.15]

HW and SW

LHC_LS_OC

LHC Low-side overcurrent [4.3.15]

HW and SW

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