L9678P datasheet(128/215 Pages) STMICROELECTRONICS

tên linh kiện	L9678P

Giải thích chi tiết về linh kiện	Automotive user configurable airbag and battery cut-off IC

PDF	215 Pages

Scroll/Zoom	100%

nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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128 / 215 page

Deployment drivers

L9678P, L9678P-S

128/216

DS11626 Rev 9

Figure 29. High level loop diagnostic flow 2

Low level diagnostic is selected (bit 15

of LPDIAGREQ is low) OR an invalid

high level diagnostic is selected OR we

are in DEP_ENABLED state

End of setting time

End of conversion

Store result in ADCRESC

End of conversion

Store result in ADCRESD

Off time elapsed AND new

diagnostic request is

SQUIB/PYROSWITCH

RESISTANCE RANGE test

Resistance test

setting time = 304μs/1200μs

TIP = 0

Resistance range test time elapsed

Latch HSR_HI, HSR_LO flags

TIP = 1

Enable ISINK

Enable ISRC

BYPASS ISRC on SRx

TIP = 1

Enable VRCM

Enable ISINK

Enable ISRC on SFx

Enable ISINK

TIP = 1

Off time elapsed AND new

diagnostic request is

SQUIB/PYROSWITCH

RESISTANCE measure test

Off time = 24μs

New high level diagnostic request

(bit 15 of LPDIAGREQ is high)

Wait enough time to

be sure that all

currents and voltages

supplies start in OFF state

Resistance range test

setting time = 152μs/600μs

SQUIB/PYROSWITCH

RES RANGE TEST

DIAG_OFF

WAIT_OFF

Resistance test

setting time = 304μs/1200μs

RES MEAS SETTLE2

RES MEAS CONV12

SQUIB/PYROSWITCH

RES MEAS CONV1

SQUIB/PYROSWITCH

RES MEAS SETTLE2

SQUIB/PYROSWITCH

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