AN2511 datasheet(16/43 Pages) STMICROELECTRONICS

16 / 43 page

PMBus commands and source code

AN2511

16/43

Doc ID 13286 Rev 2

Description

The TOFF_DELAY sets the time, in ms, from

when a stop condition is received (CONTROL

signal negated or a valid OPERATION command

received) until the unit stops transferring energy

to the output.

SMBus transaction type

Read/ Write word

Number of data bytes

Table 21.

TOFF_FALL

Command name

TOFF_FALL

Command code

65h

Description

The TOFF_FALL sets the time, in ms, from the

end of the turnoff delay time until the voltage is

commanded to zero. Note that this command can

only be used with a device whose output can sink

enough current to cause the output voltage to

decrease at a controlled rate.

SMBus transaction type

Read/ Write word

Number of data bytes

Table 22.

STATUS_BYTE

Command name

STATUS_BYTE

Command code

78h

Description

The STATUS_BYTE command returns one byte

of information with a summary of the most critical

faults

SMBus transaction type

Read byte

Number of data bytes

Table 23.

STATUS_WORD

Command name

STATUS_WORD

Command code

79h

Description

The STATUS_WORD command returns two

bytes of information with a summary of the units

fault condition.

SMBus transaction type

Read word

Number of data bytes

Table 24.

STATUS_VOUT

Command name

STATUS_VOUT

Command code

7Ah

Description

The STATUS_VOUT commands returns one byte

with status information on Vout.

Table 20.

TOFF_DELAY (continued)

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