L9660 datasheet(44/49 Pages) STMICROELECTRONICS

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Functional description

L9660

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DocID024714 Rev 2

All other combinations for MOSI bits D9:D7 produce an error response of 0xD000.

Bits [D6:D0]

Current measurement data of selected squib channel. Bit weight is

nominally 25µs for a total measurement time 3.175ms.

Monitor mode 3

Monitor mode main information:



Status of FENx Function - FENx pin OR’d with Internal FENx latch



Status of current for each channel

The SPI message definition for MOSI commands and MISO responses in Monitor Mode 3

are defined below.

Bit [D8] POR status

0= Reset occurred. Bit cleared when read

1= Normal

With Bit D9=1 CFS

Bit D7:D2‘000000’

MSB

LSB

D15

D14

D13

D12

D11

D10

MOSI Command for Monitor Mode 3

CFS

MISO Response for Monitor Mode 3

CFS

POR

STA

CF7

CF6

CF5

CF4

CF3

CF2

CF1

CF0

Table 30. MOSI monitor mode 3 bit definition

Bit

MOSI command

MISO response

State

Description

D15

Mode Bits

See above for state

D14

See above for state

D13

Odd Parity – Includes all 16 bits

D12

See above for state

D11

See above for state

D10

See above for state

D09

Status Type

0 = Current limit status

1 = FEN function status

0 = current measurement status reported

in bit D7:D0

1 = FEN function status reported in D7:D0

D08

POR status

D7:D0

Current measurement status of channels

or FEN status as indicated below

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