ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 18

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

REGISTER COMMAND SET
Summary
COMMAND FUNCTION
PAGE
OPERATION
ON_OFF_CONFIG
CLEAR_FAULTS
WRITE_PROTECT
STORE_USER_ALL
RESTORE_USER_ALL
CAPABILITY
VOUT_MODE
VOUT_COMMAND
VOUT_MAX
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
VIN_ON
VIN_OFF
VOUT_OV_FAULT_LIMIT
VOUT_OV_FAULT_RESPONSE
VOUT_OV_WARN_LIMIT
VOUT_UV_WARN_LIMIT
LTC2978
operaTion

DESCRIPTION
Operating mode control.
CONTROL pin and PMBus bus on/off
command setting.
CLEAR_FAULTS is used to clear any fault
bits that have been set.
Provides protection against accidental
changes.
Store entire operating memory to
EEPROM.
Restore entire operating memory from
EEPROM.
The CAPABILITY command provides a
way for a host system to determine the
capabilities of the PMBus device.
Output voltage format control.
Servo DC/DC converter output voltage
value setting.
The VOUT_MAX command sets an upper
limit on the output voltage, in volts, the
unit can command regardless of any other
commands or combinations.
Margin high DC/DC converter output
voltage limit setting.
Margin low DC/DC converter output
voltage limit setting.
The VIN_ON command sets the input
voltage, in volts, at which the unit should
start power conversion.
The VIN_OFF command sets the input
voltage, in volts, at which the unit should
stop power conversion.
Overvoltage DC/DC converter fault limit
setting.
The VOUT_OV_FAULT_RESPONSE
command instructs the device on what
action to take in response to an output
overvoltage fault.
Overvoltage DC/DC converter warning limit
setting.
Undervoltage DC/DC converter warning
limit setting.
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
W
R
R
LENGTH
(BITS)
DATA
16
16
16
16
16
16
16
16
16
8
8
8
0
8
0
0
8
8
8
BYTE VALUE
COMMAND
‘h00
‘h01
‘h02
‘h03
‘h10
‘h15
‘h16
‘h19
‘h20
‘h21
‘h24
‘h25
‘h26
‘h35
‘h36
‘h40
‘h41
‘h42
‘h43
MEMORY
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
TYPE
ROM
ROM
NV
DEFAULT
‘h219A
‘hD280
‘hD240
‘h1D9A
VALUE
‘h2000
‘h8000
‘h1E66
‘h2333
‘h2266
‘h00
‘h00
‘h12
‘h00
‘hE0
‘h13
‘h80
NA
NA
NA
PAGED
N
N
N
N
N
N
N
?
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
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