Store_default_all, Restore_default_all, Store_user_all – Maxim Integrated MAX15301 PMBus Command Set User Manual
Page 44
MAX15301 PMBus Command Set User’s Guide
Rev 1
Page 44 of 53
STORE_DEFAULT_ALL
This command is stored in volatile memory only.
Wait at least 450ms for execution after sending the STORE_DEFAULT_ALL command before sending
additional PMBus commands.
RESTORE_DEFAULT_ALL
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x12
Format:
N/A
Data Bytes:
0
Units:
N/A
Transfer:
Send Byte
Factory Value:
N/A
Description/Notes: See Section 11.3 of the PMBus Specification Part II.
The MAX15301 includes three banks of nonvolatile (flash memory) storage for most “writeable”
PMBus command values, referred to as the USER, DEFAULT, and MAXIM stores. These stores are fully
independent, but identical in structure.
The DEFAULT store is intended to function as a backup of an original equipment manufacturer (OEM)
preferred device configuration.
The contents of the DEFAULT store are only loaded into working memory when the
RESTORE_DEFAULT_ALL command is sent; there are no other conditions or actions that result in
loading of the DEFAULT store to working memory.
Be aware that several commands in the DEFAULT store are set to zero (or other safe values) by
default to prevent unintended operational consequences following a RESTORE_DEFAULT_ALL
command.
Wait at least 10ms for execution after sending the RESTORE_DEFAULT_ALL command before sending
additional PMBus commands.
Please see
for exceptions to PMBus nonvolatile command storage.
STORE_USER_ALL
Reference:
Standard Command
Lockable:
Yes
Command Code:
0x15
Format:
N/A
Data Bytes:
0
Units:
N/A
Transfer:
Send Byte
Factory Value:
N/A
Description/Notes: See Section 11.6 of the PMBus Specification Part II.
The MAX15301 includes three banks of nonvolatile (flash memory) storage for most “writeable”
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 MAX15301 device. The USER store can also be loaded to working memory at any time by sending