L9788 datasheet(224/264 Pages) STMICROELECTRONICS

224 / 264 page

Micro second channel (MSC) interface

L9788

224/264

DS12308 Rev 4

18.6.6

Upstream Bit Map Read6 (DRIVER DIAGNOSIS)

FRAME[1:4]: Driver diagnosis for driver

STA: driver diagnosis: error in driver status

The driver status is detected by reading the STG comparator in on and off, it should be

aligned with command (msc command and enabling).

0: aligned, no error

1: not aligned, error

STG/STB: driver diagnosis: short to ground/battery

0: no fault (default)

1: for low-side and igniter drivers: short to ground fault

for high-side driver: short to battery fault

OPL: driver diagnosis: open load

0: no fault (default)

1: open load fault

OVC: driver diagnosis: over current

0: no fault (default)

1: over current faul

Table 98. MSC Interface Upstream Bit Map Read6

ADDRESS

DATA

A0 A1 A2 A3

FRAME1 0

DIAG INJ1

DIAG INJ2

STA

STG

OPL

OVC

STA

STG

OPL

OVC

FRAME2 0

DIAG INJ3

DIAG INJ4

STA

STG

OPL

OVC

STA

STG

OPL

OVC

FRAME3 0

DIAG O2H1

STA

STG

OPL

OVC

FRAME4 0

DIAG O2H2

STA

STG

OPL

OVC

source

logic on VB_IN (main logic)

access

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