L9779WD-SPI datasheet(31/141 Pages) STMICROELECTRONICS

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L9779WD-SPI

Functional description

140

Legend:

Internal registers =

configuration registers

Interfaces driver =

control registers (OUT_DIS), LS/HS drivers, ext-MOS, IGBT

LB internal registers =

include dedicated configuration bit for Low battery drivers

LB interfaces driver =

control registers (OUT_DIS) + interface drivers logic for Low

battery drivers

Smart reset logic =

include VDD5 undervoltage and some time counter (TNL,

D_UV_RST, THOLD)

VB over voltage

tTBOV1<t<tTBOV2

Interfaces drivers

LB interfaces drivers

Internal registers

LB internal registers

CAN & K-LINE & VRS

Smart reset function

Power-up/down

manager

MRD=ON

VDD5=ON

V3V3=ON

VTRACK1,2=ON

OV_RST

VB over voltage

t>tTBOV2

Yes

Internal registers

Interfaces drivers

LB interfaces drivers

LB internal registers

CAN & K-LINE & VRS

Smart reset function

Power-up/down

manager

MRD=ON

VDD5=OFF

V3V3=OFF

VTRACK1,2=OFF

OV_RST

RST driven low

externally

t<THOLD

Yes

Internal registers

Interfaces drivers

CAN & K-LINE & VRS

LB interfaces drivers

LB internal registers

Smart reset function

Power-up/down

manager

Keep state

N/A

RST driven low

externally

t>THOLD

Yes

Internal registers

Interfaces drivers

LB interfaces drivers

LB internal registers

CAN & K-LINE & VRS

Smart reset function

Power-up/down

manager

Keep state

N/A

Software reset sent

by the µC through

SPI

Internal registers

Interfaces drivers

LB interfaces drivers

LB internal registers

CAN & K-LINE & VRS

Smart reset function

Power-up/down

manager

MRD=ON

VDD5=ON

V3V3=ON

VTRACK1,2=ON

N/A

Table 8. Internal reset (continued)

Event

RST

driven

low

Logic under reset

Logic not reset

Power-up/down

manager output

Information

FLAG

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