Store_user_all, Restore_user_all – Maxim Integrated MAX15303 PMBus Command Set User Manual
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MAX15303 PMBus Command Set User’s Guide
Page 44 of 52
STORE_USER_ALL
independently in nonvolatile memory for security.
The manufacturer security password is always volatile for obvious
reasons.
The user flags for password command locking are stored
independently in nonvolatile memory for security.
The user security password is always volatile for obvious reasons.
This command is used to initiate a partial internal edit of the
nonvolatile “Config Page” special-purpose memory bank.
Wait at least 450ms for execution after sending the STORE_USER_ALL command before sending
additional PMBus commands.
RESTORE_USER_ALL
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x16
Format:
N/A
Data Bytes:
0
Units:
N/A
Transfer:
Send Byte
Factory Value:
N/A
Description/Notes: See Section 11.7 of the PMBus Specification Part II.
The MAX15303 includes three banks of nonvolatile (flash memory) storage for most “writable”
PMBus command values, referred to as the USER, DEFAULT, and MAXIM stores. These stores are fully
independent, but identical in structure.
The USER store functions as the primary nonvolatile storage of all PMBus command values. Original
equipment manufacturers (OEMs) should save identical configurations to the USER store and the
DEFAULT store, such that the USER store can be refreshed from the DEFAULT store if needed.
The contents of the USER store are loaded into working memory every time input power is applied to
the MAX15303 device. The USER store can also be loaded to working memory at any time by sending
the RESTORE_USER_ALL command.
Wait at least 10ms for execution after sending the RESTORE_USER_ALL command before sending
additional PMBus commands.
See
for exceptions to PMBus nonvolatile command storage.