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LTC2978 Datasheet(PDF) 21 Page - Linear Technology

Part # LTC2978
Description  Octal PMBus Power Supply Monitor and Controller with EEPROM
PDF  64 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2978 Datasheet(HTML) 21 Page - Linear Technology

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LTC2978

2978fa
Summary
COMMAND FUNCTION
DESCRIPTION
R/W
DATA
LENGTH
(BITS)
COMMAND
BYTE VALUE
NV
MEMORY
TYPE
DEFAULT
VALUE
PAGED
?
MFR_VINEN_UV_FAULT_RESPONSE
Determines the response of the VIN_EN
pin to a VOUT_UV_FAULT
R/W
8
‘hDA
EEPROM
‘h00
N
MFR_RETRY_DELAY
Sets retry interval during retry mode.
R/W
16
‘hDB
EEPROM
‘hF320
N
MFR_RESTART_DELAY
Sets delay from actual CONTROL active
edge to virtual CONTROL active edge.
R/W
16
‘hDC
EEPROM
‘hFB20
N
MFR_VOUT_PEAK
Returns the maximum measured value of
VOUT.
R
16
‘hDD
NA
Y
MFR_VIN_PEAK
Returns the maximum measured value of
VIN_SNS.
R
16
‘hDE
NA
N
MFR_TEMPERATURE_PEAK
Returns the maximum measured value of
temperature.
R
16
‘hDF
NA
N
MFR_DAC
Manufacturer register that contains the
code of the 10-bit voltage-buffered current
DAC.
R/W
16
‘hE0
EEPROM
‘h0000
Y
MFR_POWERGOOD_ASSERTION_DELAY Determines power good output assertion
delay.
R/W
16
‘hE1
EEPROM
‘hEB20
N
MFR_WATCHDOG_T_FIRST
First watchdog timer interval.
R/W
16
‘hE2
EEPROM
‘h8000
N
MFR_WATCHDOG_T
Watchdog timer interval.
R/W
16
‘hE3
EEPROM
‘h8000
N
MFR_PAGE_FF_MASK
Selects which channels respond to global
page commands.
R/W
8
‘hE4
EEPROM
‘hFF
N
MFR_PADS
Returns values detected and driven onto
digital I/O pads.
R
16
‘hE5
N/A
N
MFR_I2C_BASE_ADDRESS
This register determines the base value of
the I2C address byte.
R/W
8
‘hE6
EEPROM
‘h5C
N
MFR_SPECIAL_ID
This register contains the manufacturer
code for identifying the LTC2978.
R
16
‘hE7
EEPROM
‘h0121
N
MFR_SPECIAL_LOT
These registers contain customer
dependent codes that identify the factory
programmed user configuration stored in
EEPROM.
R/W
8
‘hE8
EEPROM
Contact
the
Factory
Y
MFR_VOUT_DISCHARGE_THRESHOLD
Coefficient used to multiply VOUT_
COMMAND in order to determine VOUT
OFF threshold voltage.
R/W
16
‘hE9
EEPROM
‘hC200
Y
MFR_FAULT_LOG_STORE
Command a transfer of the fault log from
RAM to EEPROM. This causes the part to
behave as if a channel has faulted off.
W
0
‘hEA
NA
N
MFR_FAULT_LOG_RESTORE
Command a transfer of the fault log
previously stored in EEPROM back to
RAM.
W
0
‘hEB
NA
N
MFR_FAULT_LOG_CLEAR
Initialize the EEPROM block reserved for
fault logging and clear any previous fault
logging locks.
W
0
‘hEC
NA
N
MFR_FAULT_LOG_STATUS
This command returns one byte with
status information on fault logging.
R
8
‘hED
EEPROM
NA
N
MFR_FAULT_LOG
Fault log. Accessed using a block read.
Returns data in the form last in first out.
R
2048
‘hEE
EEPROM
NA
N
operaTion



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