ADM1275

Data Sheet

Rev. D | Page 36 of 48

PMBus COMMAND REFERENCE

Register addresses are in hexadecimal format.

Table 11. PMBus Command Summary

Command Code

Command Name

SMBus Transaction Type

Number of Data Bytes

Default Value at Reset

0x01

OPERATION

Read/write byte

1

0x80

0x03

CLEAR_FAULTS

Send byte

0

Not applicable

0x19

CAPABILITY

Read byte

1

0xB0

0x42

VOUT_OV_WARN_LIMIT

Read/write word

2

0x0FFF

0x43

VOUT_UV_WARN_LIMIT

Read/write word

2

0x0000

0x4A

IOUT_OC_WARN_LIMIT

Read/write word

2

0x0FFF

0x57

VIN_OV_WARN_LIMIT

Read/write word

2

0x0FFF

0x58

VIN_UV_WARN_LIMIT

Read/write word

2

0x0000

0x78

STATUS_BYTE

Read byte

1

0x00

0x79

STATUS_WORD

Read word

2

0x0000

0x7A

STATUS_VOUT

Read byte

1

0x00

0x7B

STATUS_IOUT

Read byte

1

0x00

0x7C

STATUS_INPUT

Read byte

1

0x00

0x80

STATUS_MFR_SPECIFIC

Read byte

1

0x00

0x88

READ_VIN

Read word

2

0x0000

0x8B

READ_VOUT

Read word

2

0x0000

0x8C

READ_IOUT

Read word

2

0x0000

0x98

PMBUS_REVISION

Read byte

1

0x11

0x99

MFR_ID

Block read

1 (byte count) + 3 (data)

0x03 + ASCII “ADI”

0x9A

MFR_MODEL

Block read

1 (byte count) + 9 (data)

0x09 + ASCII “ADM1275-

x”1

0x9B

MFR_REVISION

Block read

1 (byte count) + 1 (data)

0x01 + ASCII “1”

0xD0

PEAK_IOUT

Read/write word

2

0x0000

0xD1

PEAK_VIN

Read/write word

2

0x0000

0xD2

PEAK_VOUT

Read/write word

2

0x0000

0xD3

PMON_CONTROL

Read/write byte

1

0x00

0xD4

PMON_CONFIG

Read/write byte

1

0x2C

0xD5

ALERT1_CONFIG

Read/write word

2

0x0000

0xD6

ALERT2_CONFIG

Read/write word

2

0x8000

0xD7

IOUT_WARN2_LIMIT

Read/write word

2

0x0000

0xD8

DEVICE_CONFIG

Read/write byte

1

0x00

0xD9

POWER_CYCLE

Send byte

0

Not applicable

1

The character “x” in the string is 1, 2, or 3, depending on the model of the ADM1275 that is being queried (ADM1275-1, ADM1275-2, or ADM1275-3).