L9679ETR datasheet(49/127 Pages) STMICROELECTRONICS

49 / 127 page

[9:8]

VRCM[1:0]: Voltage regulator current monitor control

Updated by SSM_RESET or SPI write

00: VRCM not connected

01: VRCM connected to SFx of channel selected by LEAK_CHSEL[3:0]

10: VRCM connected to SRx of channel selected by LEAK_CHSEL[3:0] and pull down current of

the same channel disabled

11: VRCM connected to SRx of channel selected by LEAK_CHSEL[3:0] and pull down current of

the same channel enabled (ISINK and ISRC must be switched off)

[7:4]

0000

RES_MEAS_CHSEL[3:0]: Squib/Pyroswitch resistance measurement channel select - selects the

channel and muxes for the resistance test, and the channel for HS driver test (full path fet test)

activation

Updated by SSM_RESET or SPI write

0000: Channel 0

0001: Channel 1

0010: Channel 2

0011: Channel 3

0100: Channel 4

0101: Channel 5

0110: Channel 6

0111: Channel 7

0100 - 1111 None Selected

[3:0]

0000

LEAK_CHSEL[3:0]: Squib/Pyroswitch Leakage Measurement Channel select - selects the

channel and muxes for the leakage test, and the channel for HS/LS FET test activation.

Updated by SSM_RESET or SPI write

0000: Channel 0

0001: Channel 1

0010: Channel 2

0011: Channel 3

0100 : Channel 4

0101: Channel 5

0110: Channel 6

0111: Channel 7

0100 - 1111: None Selected

L9679E

SPI interface

DS12485 - Rev 8

page 49/127

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