L9924L datasheet(65/84 Pages) STMICROELECTRONICS

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L9924L

SPI interface

12.4.6

LAMP LIN GENERAL STATUS register [0x12]

This register returns system status flags:



0: the notification is not present



1: the notification is present. The register read operation clears the notification

Table 45. LAMP LIN GENERAL STATUS register [0x12]

Bit

Reset

value

Description

13 LIN_PERM_DOM

0 (RC)

LIN Permanent Dominant

12 LIN_TXD_DOM

0 (RC)

LIN Dominant TXD

11 LIN_PERM_REC

0 (RC)

LIN Permanent Recessive

10 PHO_OC [4.3.18]

0 (RC)

Phase out overcurrent (low side or high side)

EXTP_OC(1) [4.3.10]

1. A driver is immediately switched off at the occurrence of an overcurrent event and remains “locked” until

the suitable restore procedure is applied:

- Switch the output off with the relevant SPI command (L, LHC and DFM) or remove the excitation signal

(power MOS)

- Clear the alarm flags with the read and clear command

- Switch the output on with the relevant SPI command (L, LHC and DFM) or apply the excitation signal (power MOS)

0 (RC)

External MOS overcurrent

CP_LOW [4.3.19]

1 (RC)

Low Voltage on CP pin

After a wakeup this bit is 1 because the

CP_ENABLE (bit 11 of register 0x03 [12.4.12)

has not yet been set.

To clear this bit, the CP_ENABLE must be set,

then the status register must be read with the

clear option after a suitable time interval.

APLUS_OV [4.3.1]

0 (RC)

Overvoltage A+

APLUS_UV

0 (RC)

Undervoltage A+

THSD

0 (RC)

Overtemperature(2)

2. The over-temperature condition automatically causes a power off (thermal shutdown): the THSD bit can be

read by the microcontroller at power up in order to know the history of the system; if the bit is set it means

that the previous power off was caused by an over-temperature occurrence.

4DFM_OC(1)

0 (RC)

Over current DFM (high side or low side

driver)

L_HS_OC(1) [4.3.13]

0 (RC)

L High side driver overcurrent

L_LS_OC (1)[4.3.13]

0 (RC)

L Low side driver overcurrent

LHC_HS_OC(1)

0 (RC)

LHC High side driver overcurrent

LHC_LS_OC(1)

0 (RC)

LHC Low side driver overcurrent

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