ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 20

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

LTC2978
operaTion
Summary
COMMAND FUNCTION
TOFF_DELAY
STATUS_BYTE
STATUS_WORD
STATUS_VOUT
STATUS_INPUT
STATUS_TEMPERATURE
STATUS_CML
STATUS_MFR_SPECIFIC
READ_VIN
READ_VOUT
READ_TEMPERATURE_1
PMBUS_REVISION
MFR_CONFIG
MFR_CONFIG_ALL
MFR_FAULTBz0_PROPAGATE
MFR_FAULTBz1_PROPAGATE
MFR_PWRGD_EN
MFR_FAULTB00_RESPONSE
MFR_FAULTB01_RESPONSE
MFR_FAULTB10_RESPONSE
MFR_FAULTB11_RESPONSE
MFR_VINEN_OV_FAULT_RESPONSE
0
DESCRIPTION
Time, in ms, from CONTROL and/or
Operation off to VOUT_EN off.
Fault status reporting.
The STATUS_WORD command returns
two bytes of information with a summary
of the unit’s fault condition.
Voltage fault status reporting.
The STATUS_INPUT command returns one
byte with status on V
The STATUS_TEMPERATURE command
returns one byte with status information
on temperature.
The STATUS_CML command returns
one byte with status information on
communication and memory.
The STATUS_MFR_SPECIFIC command
returns one byte with the manufacturer
specific status information.
Input supply voltage read back.
DC/DC converter output voltage read back.
Internal junction temperature read back.
Read the supported PMBus revision (1.1).
Manufacturer configuration bits that are
channel specific.
Manufacturer configuration bits that are
common to all pages.
Manufacturer configuration that
determines which channel faults are
propagated to FAULTBz0 where z = 0 for
channels 0-3, and z=1 for channels 4-7.
Manufacturer configuration that
determines which channel faults are
propagated to FAULTBz1.
Maps PWRGD status to the PWRGD pin.
Determines response to FAULTB00 pin
being asserted low.
Determines response to FAULTB01 pin
being asserted low.
Determines response to FAULTB10 pin
being asserted low.
Determines response to FAULTB11 pin
being asserted low.
Determines the response of the VIN_EN
pin to a VOUT_OV_FAULT
IN_SNS
.
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
R
R
R
R
R
R
R
R
R
R
LENGTH
(BITS)
DATA
16
16
16
16
16
16
16
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
BYTE VALUE
COMMAND
‘h7A
‘h7C
‘h7D
‘h8B
‘h8D
‘hD0
‘hD1
‘hD2
‘hD3
‘hD4
‘hD5
‘hD6
‘hD7
‘hD8
‘hD9
‘h64
‘h78
‘h79
‘h7E
‘h80
‘h88
‘h98
MEMORY
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
EEPROM
TYPE
ROM
NV
DEFAULT
‘hBA00
VALUE
‘h0080
‘h0000
‘h11
‘h7B
‘h00
‘h00
‘h00
‘h00
‘h00
‘h00
‘h00
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
PAGED
N
N
N
N
N
N
N
N
N
N
N
N
N
?
Y
Y
Y
Y
Y
Y
Y
Y
Y
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