ADP1053ACPZ-R7 datasheet(46/84 Pages) AD

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ADP1053

Data Sheet

Rev. A | Page 46 of 84

PMBus COMMAND DESCRIPTIONS

CLEAR_FAULTS COMMAND

Command 0x03, send byte, no data. This command clears all fault bits in the STATUS_WORD register.

WRITE_PROTECT COMMAND

Table 14. Command 0x10—WRITE_PROTECT

Bits

Bit Name

R/W

Description

Write Protect 1

R/W

Setting this bit disables writes to all commands except for WRITE_PROTECT.

Write Protect 2

R/W

Setting this bit disables writes to all commands except for WRITE_PROTECT, OPERATION, and PAGE.

Write Protect 3

R/W

Setting this bit disables writes to all commands except for WRITE_PROTECT, OPERATION, PAGE,

ON_OFF_CONFIG, and VOUT_COMMAND.

[4:0]

Reserved

Reserved.

RESTORE_DEFAULT_ALL COMMAND

Command 0x12, send byte, no data. This command downloads the factory default settings from EEPROM (Page 0) into operating memory.

STORE_USER_ALL COMMAND

Command 0x15, send byte, no data. This command copies the entire contents of operating memory into EEPROM (Page 1 of the main block).

The EEPROM must first be unlocked.

RESTORE_USER_ALL COMMAND

Command 0x16, send byte, no data. This command downloads the stored user settings from EEPROM (Page 1 of the main block) into

operating memory.

CAPABILITY COMMAND

This command allows host systems to determine the capabilities of the PMBus device.

Table 15. Command 0x19—CAPABILITY (Default Value = 0x20)

Bits

Bit Name

R/W

Description

Packet error

checking

Always reads 0. Packet error checking (PEC) is not supported.

[6:5]

Maximum bus

speed

Return the device PMBus speed capability. Always reads 01 (maximum bus speed is 400 kHz).

SMBALERT#

Always reads 0. SMBALERT# pin and SMBus alert response protocol are not supported.

[3:0]

Reserved

Reserved.

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