ADP1053
Data Sheet
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
7
Write Protect 1 R/W Setting this bit disables writes to all commands except for WRITE_PROTECT.
6
Write Protect 2 R/W Setting this bit disables writes to all commands except for WRITE_PROTECT, OPERATION, and PAGE.
5
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
R
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
7
Packet error
R
Always reads 0. Packet error checking (PEC) is not supported.
checking
[6:5] Maximum bus R
speed
Return the device PMBus speed capability. Always reads 01 (maximum bus speed is 400 kHz).
4
SMBALERT#
R
Always reads 0. SMBALERT# pin and SMBus alert response protocol are not supported.
[3:0] Reserved
R
Reserved.
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