ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 23

• Manufacturer Part Number: ltc2978
• Description: Octal Pmbus Power Supply Monitor And Controller With Eeprom
• Manufacturer: Linear Technology Corporation

OPERATION
The OPERATION command is used to turn the unit on and
off in conjunction with the CONTROLn pin and ON_OFF_
CONFIG. This command register responds to the global
page command. The contents and functions of the data
byte are shown in the following tables.
OPERATION Data Contents When On_Off_Config_Use_PMBus Enables Operation_Control
OPERATION Data Contents When On_Off_Config is Configured Such That OPERATION Command is Not Used to Command Channel On
or Off
operaTion
FUNCTION
FUNCTION
SYMBOL
SYMBOL
BITS
BITS
Turn off immediately
Turn on
Margin Low (Ignore Faults and
Warnings)
Margin Low
Margin High (Ignore Faults and
Warnings
Margin High
Sequence off and margin to
nominal
Sequence off and Margin Low
(Ignore Faults and Warnings)
Sequence off and Margin Low
Sequence off and Margin High
(Ignore Faults and Warnings)
Sequence off and Margin High
Reserved
Output at Nominal
Margin Low (Ignore faults and
Warnings)
Margin Low
Margin High (Ignore Faults and
Warnings
Margin High
Reserved
Action
Action
Operation_control[1:0]
Operation_control[1:0]
00, 01 or 10
00, 01 or 10
00, 01 or 10
00, 01 or 10
00, 01 or 10
b[7:6]
b[7:6]
00
10
10
10
10
10
01
01
01
01
01
Operation_margin[1:0]
Operation_margin[1:0]
b[5:4]
b[5:4]
XX
00
01
01
10
10
00
01
01
10
10
00
01
01
10
10
All remaining combinations
All remaining combinations
Operation_fault[1:0]
Operation_fault[1:0]
b[3:2]
b[3:2]
XX
XX
XX
XX
01
10
01
10
01
10
01
10
01
10
01
10
Reserved (read only)
Reserved (read only)
LTC2978
b[1:0]
b[1:0]
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00

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