L9662 datasheet(52/80 Pages) STMICROELECTRONICS

52 / 80 page

Functional description

L9662

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DocID028325 Rev 1

Bits [D9:D7].

Used when sending the MOSI command to select the channel to be

measured. The MISO response shall echo the MOSI command.

Bits [D6:D0].

Current measurement data of selected squib channel. Bit weight is

nominally 25 μs for a total measurement time 3.175 ms.

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.

Table 29. MOSI monitor mode 2 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

Keep timer measurements

See above for state

Clear “current measurement time” stored

on the

See above for state

D11

Monitor Mode selection bits

See above for state

D10

Monitor Mode selection bits

See above for state

Channel selected for current

measurement

See Table 30

Internal Stored channel selections bits

D6:D0

Current measurement of selected

channel

Table 30. Current measurement channel selections

Channel

Bit D9

Bit D08

Bit D07

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