LTC2978C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2978C' PDF : 64 Pages View PDF
LTC2978
PMBus Command summary
Summary Table
COMMAND NAME
CMD
CODE DESCRIPTION
MFR_DAC
0xE0 Manufacturer register that contains the
code of the 10-bit DAC.
MFR_POWERGOOD_
ASSERTION_DELAY
0xE1 Power good output assertion delay.
MFR_WATCHDOG_T_FIRST 0xE2 First watchdog timer interval.
DATA
TYPE PAGED FORMAT UNITS
R/W Word Y
Reg
R/W Word N
L11 ms
R/W Word N
L11 ms
MFR_WATCHDOG_T
0xE3 Watchdog timer interval.
R/W Word N
L11 ms
MFR_PAGE_FF_MASK
0xE4 Configuration defining which channels R/W Byte N
Reg
respond to global page commands
(PAGE=0xFF).
MFR_PADS
0xE5 Current state of selected digital I/O pads. R Word N
Reg
MFR_I2C_BASE_ADDRESS 0xE6 Base value of the I2C/SMBus address
R/W Byte N
Reg
byte.
MFR_SPECIAL_ID
0xE7 Manufacturer code for identifying the
LTC2978
R Word N
Reg
MFR_SPECIAL_LOT
0xE8 Customer dependent codes that
R Byte
Y
Reg
identify the factory programmed user
configuration stored in EEPROM. Contact
factory for default value.
MFR_VOUT_DISCHARGE_ 0xE9 Coefficient used to multiply VOUT_
R/W Word Y
L11
THRESHOLD
COMMAND in order to determine VOUT off
threshold voltage.
MFR_FAULT_LOG_STORE 0xEA Command a transfer of the fault log from Send Byte N
RAM to EEPROM. This causes the part to
behave as if a channel has faulted off.
MFR_FAULT_LOG_
RESTORE
0xEB Command a transfer of the fault log
previously stored in EEPROM back to
RAM.
Send Byte N
MFR_FAULT_LOG_CLEAR 0xEC Initialize the EEPROM block reserved for Send Byte N
fault logging and clear any previous fault
logging locks.
MFR_FAULT_LOG_STATUS 0xED Fault logging status.
R Byte N
Reg
MFR_FAULT_LOG
0xEE Fault log data bytes. This sequentially
R Block N
Reg
retrieved data is used to assemble a
complete fault log. 256 Bytes: 0xFF
followed by 255 bytes of fault log data.
MFR_COMMON
0xEF Manufacturer status bits that are common R Byte N
Reg
across multiple LTC chips.
MFR_SPARE_0
0xF7 Scratchpad register
R/W Word N
Reg
MFR_SPARE_2
0xF9 Paged scratchpad register
R/W Word Y
Reg
MFR_VOUT_MIN
0xFB Minimum measured value of READ_
VOUT.
R Word Y
L16
V
MFR_VIN_MIN
0xFC Minimum measured value of READ_VIN. R Word N
L11
V
MFR_TEMPERATURE_MIN 0xFD Minimum measured value of READ_
TEMPERATURE_1.
R Word N
L11
°C
EEPROM
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
DEFAULT
VALUE
FLOAT
HEX
0x0000
100.0
0xEB20
0
0x8000
0
0x8000
0xFF
N/A
0x5C
0x0122
2.0
0xC200
NA
NA
NA
NA
NA
NA
0x0000
0x0000
NA
NA
NA
REF
PAGE
50
50
50
50
51
52
52
52
53
53
55
55
55
55
56
53
53
53
54
54
54
For more information www.linear.com/LTC2978
2978fd
27
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