L9654 datasheet(38/59 Pages) STMICROELECTRONICS

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Functional description

L9654

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Odd parity check includes all 16 bits. “Don’t care” bit is included in the parity check as well.

Bit D8 is used to select the meaning of bit D3 through bit D0 in the status response

message.

When this bit is set to ‘1’, bit D3 through D0 in the status response message report the

deployment status OR the deploy success flag. Once the deployment starts, bit D3 through

bit D0 report ‘1’ until the deploy success flag is cleared. Bit D3 through bit D0 shall not report

‘0’ before the deploy success flag is cleared.

The default state of this bit is ‘0.’ When this bit is ‘0’, bit D3 through bit D0 in the status

response message report the deploy success flag. Deploy success flags are cleared by bit

D3 through bit D0 in the monitor mode command. Deployment status bits report the

deployment state. If the deployment is active during a rising edge of CS_D, deployment

status bits is set to ‘1.’ Otherwise, is set to ‘0.’

If bit D8 in the monitor mode command changes state, bit D3 through bit D0 report the

proper states of the internal signals/flags. Deploy command success bit indicates if the

corresponding channel has finished its deployment sequence. This bit is set when

deployment period, tDEPLOY, has expired.

Once this bit is set, it inhibits the subsequent deployment command until a SPI command, to

clear this deployment success flag, is received. Bit D3 through bit D0 is used to clear/keep

the deploy success flag. When these bits are set to ‘1’, the flag can be cleared. Otherwise,

the state of these flags is not affected.

Don’t Care

Keep Deploy Success Flag Channel 0 (default)

Clear Deploy Success Flag Channel 0

Keep Deploy Success Flag Channel 2 (default)

Clear Deploy Success Flag Channel 2

Keep Deploy Success Flag Channel 1 (default)

Clear Deploy Success Flag Channel 1

Keep Deploy Success Flag Channel 0 (default)

Clear Deploy Success Flag Channel 0

Table 21. MOSI monitor mode message definition (continued)

Bit

State

Description

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