L9658 datasheet(43/64 Pages) STMICROELECTRONICS

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L9658

Functional description

Doc ID 14219 Rev 3

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4.12.1

Deployment driver command mode response

Command mode response is defined as shown here after.

DEPEN status flag (bit D12) indicates the state of DEPEN pin.

ARM status flag (bit D11 through bit D8) indicates the state of the respective arming signal,

including the pulse stretch timer. If the pulse stretch timer is initiated by a deployment

command, it shall not assert the arming status flag. This flag will be negated as soon as the

de-glitch timer is expired. ARM status flag is an OR-function of arming states from two

channels.

SPI deploy command status flag indicates the SPI deployment status for the respective

channel. These flags reflects bit D7 through bit D0 of the most recent SPI command mode

message. These bits do not include the status of pulse stretch timer. These bits will be

overwritten by the most recent SPI command mode message.

Table 26.

MISO command mode response definition

Bit

State

Description

D15

Mode Bits

D14

D13

Don’t Care

D12

DEPEN Negated

DEPEN Asserted

D11

ARM67 Negated

ARM67 Asserted

D10

ARM45 Negated

ARM45 Asserted

ARM23 Negated

ARM23 Asserted

ARM01 Negated

ARM01 Asserted

SPI Deploy Command Status: Channel 7

SPI Deploy Command Status: Channel 6

SPI Deploy Command Status: Channel 5

SPI Deploy Command Status: Channel 4

SPI Deploy Command Status: Channel 3

SPI Deploy Command Status: Channel 2

SPI Deploy Command Status: Channel 1

SPI Deploy Command Status: Channel 0

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