L9907 datasheet(34/49 Pages) STMICROELECTRONICS

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SPI operation

L9907

34/49

DS11800 Rev 5

The Power Up default value for this parameter is "10", corresponding to Vcc = 3.3 V

applications.

A SPI command attempting to set a not allowed VCCOV configuration does not return any

SPI error, and the VCCOV configuration register retains its previous value.

CMD2 register - Test Mode Selections: B(15:13) = 010

SDI bit B12: GCR_INT_I

This bit is accessible for writing only if AND(EN1,EN2)='0': trying to write it without

lowering AND(EN1,EN2) will not generate any SPI error but command will be

simply ignored for the specific bit.

Once written, CMD2 B12 changes the status of the output GCR_INT_I (refer to

Section 2.5.1).

SDI bit B9: BstDisEN

This bit is accessible for writing only if AND(EN1,EN2)='0': trying to write it without

lowering AND(EN1,EN2) will not generate any SPI error but command will be

simply ignored for the specific bit.

Once written, CMD2 B9 determines how to behave in case of activation of

BST_DIS pin. In case this bit is set and activating BST_DIS pin brings the device

to switch-off BST_CLK till BST_DIS pin becomes low (refer to Section 2.4.1).

SDI bit B8: SHT_PH

This bit is accessible for writing only if AND(EN1,EN2)='0': trying to write it without

lowering AND(EN1,EN2) will not generate any SPI error but command will be

simply ignored for the specific bit.

Once written, CMD2 B8 determines how to behave in case of shoot-through

detected. In case this bit is not set (default) a shoot-through in any phase will

prevent the actuation of all commands, only the involved phase is inhibited

otherwise (refer to Section 2.5.2).

VSCTST (B7) = '1' activates Test Function for short circuit level ('0' is the default

value).

VOVTST (B6) = '1' activates Test Function for VCC over-voltage level ('0' is the

default value).

SDI bit B5: Short_PH

This bit is accessible for writing only if AND(EN1,EN2)='0': trying to write it without

lowering AND(EN1,EN2) will not generate any SPI error but command will be

simply ignored for the specific bit.

Once written, CMD2 B5 determines how to behave in case of external FET (both

HS and LS) short detected. In case this bit is not set (default) a short in any phase

will prevent the actuation of all commands, only the involved phase is inhibited

otherwise (refer to Section 2.5.3).

Not Allowed

Table 33. VCC over voltage threshold (continued)

VCCOV

B1 = VCCOV2

B0 = VCCOV1

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