40a digital megadlynx, Non-isolated dc-dc power modules, Data sheet – GE Industrial Solutions 40A Digital MegaDLynx User Manual
Page 22: Summary of supported pmbus commands
GE
Data Sheet
40A Digital MegaDLynx
TM
: Non-Isolated DC-DC Power Modules
4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current
April 24, 2013
©2012 General Electric Company. All rights reserved.
Page 22
Summary of Supported PMBus Commands
Please refer to the PMBus 1.1 specification for more details of these commands.
Table 6
Hex
Code
Command
Brief Description
Non-Volatile
Memory Storage
01
OPERATION
Turn Module on or off. Also used to margin the output voltage
Format
Unsigned Binary
Bit Position
7
6
5
4
3
2
1
0
Access
r/w
r
r/w
r/w
r/w
r/w
r
r
Function
On
X
Margin
X
X
Default Value
0
0
0
0
0
0
X
X
02
ON_OFF_CONFIG
Configures the ON/OFF functionality as a combination of analog ON/OFF pin and
PMBus commands
Format
Unsigned Binary
Bit Position
7
6
5
4
3
2
1
0
Access
r
r
r
r/w
r/w
r/w
r/w
r
Function
X
X
X
pu
cmd
cpr
pol
cpa
Default Value
0
0
0
1
0
1
1
1
YES
03
CLEAR_FAULTS
Clear any fault bits that may have been set, also releases the SMBALERT# signal if
the device has been asserting it.
10
WRITE_PROTECT
Used to control writing to the module via PMBus. Copies the current register setting
in the module whose command code matches the value in the data byte into non-
volatile memory (EEPROM) on the module
Format
Unsigned Binary
Bit Position
7
6
5
4
3
2
1
0
Access
r/w
r/w
r/w
x
x
x
x
x
Function
bit7
bit6
bit5
X
X
X
X
X
Default Value
0
0
0
X
X
X
X
X
Bit5: 0 – Enables all writes as permitted in bit6 or bit7
1 – Disables all writes except the WRITE_PROTECT, OPERATION
and ON_OFF_CONFIG (bit 6 and bit7 must be 0)
Bit 6: 0 – Enables all writes as permitted in bit5 or bit7
1 – Disables all writes except for the WRITE_PROTECT and
OPERATION commands (bit5 and bit7 must be 0)
Bit7: 0 – Enables all writes as permitted in bit5 or bit6
1 – Disables all writes except for the WRITE_PROTECT command
(bit5 and bit6 must be 0)
YES
11
STORE_DEFAULT_ALL
Copies all current register settings in the module into non-volatile memory
(EEPROM) on the module. Takes about 50ms for the command to execute.
12
RESTORE_DEFAULT_ALL
Restores all current register settings in the module from values in the module non-
volatile memory (EEPROM)
13
STORE_DEFAULT_CODE
Copies the current register setting in the module whose command code matches
the value in the data byte into non-volatile memory (EEPROM) on the module
Bit Position
7
6
5
4
3
2
1
0
Access
w
w
w
w
w
w
w
w
Function
Command code
14
RESTORE_DEFAULT_CODE
Restores the current register setting in the module whose command code matches
the value in the data byte from the value in the module non-volatile memory
(EEPROM)
Bit Position
7
6
5
4
3
2
1
0
Access
w
w
w
w
w
w
w
w
Function
Command code
20
VOUT_MODE
The module has MODE set to Linear and Exponent set to -10. These values cannot
be changed
Bit Position
7
6
5
4
3
2
1
0
Access
r
r
r
r
r
r
r
r
Function
Mode
Exponent
Default Value
0
0
0
1
0
1
1
0