LTC2978A View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC2978A
Linear Technology
'LTC2978A' PDF : 82 Pages View PDF
LTC2978A
PMBus Command summary
Summary Table
COMMAND NAME
MFR_DAC
MFR_POWERGOOD_
ASSERTION_DELAY
MFR_WATCHDOG_T_FIRST
MFR_WATCHDOG_T
MFR_PAGE_FF_MASK
MFR_PADS
MFR_I2C_BASE_ADDRESS
MFR_SPECIAL_ID
MFR_SPECIAL_LOT
MFR_VOUT_DISCHARGE_
THRESHOLD
MFR_FAULT_LOG_STORE
MFR_FAULT_LOG_RESTORE
MFR_FAULT_LOG_CLEAR
MFR_FAULT_LOG_STATUS
MFR_FAULT_LOG
MFR_COMMON
MFR_SPARE_0
MFR_SPARE_1
MFR_SPARE_2
MFR_SPARE_3
MFR_VOUT_MIN
MFR_VIN_MIN
MFR_TEMPERATURE_MIN
CMD
CODE DESCRIPTION
DEFAULT
VALUE
DATA
FLOAT REF
TYPE PAGED FORMAT UNITS EEPROM HEX PAGE
0xE0 Manufacturer register that contains the R/W Word Y
Reg
code of the 10-bit DAC.
0x0000 51
0xE1 Power good output assertion delay.
R/W Word N
L11 ms
Y
100.0 51
0xEB20
0xE2 First watchdog timer interval.
R/W Word N
L11 ms
Y
0
51
0x8000
0xE3 Watchdog timer interval.
R/W Word N
L11 ms
Y
0
51
0x8000
0xE4 Configuration defining which channels
R/W Byte N
Reg
respond to global page commands
(PAGE=0xFF).
Y
0xFF 52
0xE5 Current state of selected digital I/O pads. R Word N
Reg
0xE6 Base value of the I2C/SMBus address
byte.
R/W Byte N
Reg
N/A 53
Y
0x5C 53
0xE7 Manufacturer code for identifying the
LTC2978A
R Word N
Reg
Y 0x0124 53
0xE8 Customer dependent codes that
R Byte
Y
Reg
Y
54
identify the factory programmed user
configuration stored in EEPROM. Contact
factory for default value.
0xE9 Coefficient used to multiply VOUT_
R/W Word Y
L11
COMMAND in order to determine VOUT off
threshold voltage.
Y
2.0 54
0xC200
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.
NA 56
0xEB Command a transfer of the fault log
previously stored in EEPROM back to
RAM.
Send Byte N
NA 56
0xEC Initialize the EEPROM block reserved for Send Byte N
fault logging and clear any previous fault
logging locks.
NA 56
0xED Fault logging status.
R Byte
N
Reg
Y
NA 56
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.
Y
NA 57
0xEF Manufacturer status bits that are common R Byte
N
Reg
across multiple LTC chips.
NA 54
0xF7 Scratchpad register.
R/W Word N
Reg
Y 0x0000 54
0xF8 Manufacturer reserved.
R/W Word N
Reg
Y
NA 54
0xF9 Paged scratchpad register.
R/W Word Y
Reg
Y 0x0000 54
0xFA Manufacturer reserved.
R/W Word Y
Reg
Y
NA 54
0xFB Minimum measured value of READ_
VOUT.
R Word Y
L16
V
NA 55
0xFC Minimum measured value of READ_VIN. R Word N
L11
V
NA 55
0xFD Minimum measured value of READ_
TEMPERATURE_1.
R Word N
L11 °C
NA 55
2978af
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