Datasheet

LTC2978A
28
2978afa
For more information www.linear.com/LTC2978A
Summary Table
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
D
ATA
FORMAT UNITS EEPROM
DEFAULT
VALUE
FLOAT
HEX
REF
PAGE
MFR_DAC 0xE0 Manufacturer register that contains the
code of the 10-bit DAC.
R/W Word Y Reg 0x0000 51
MFR_POWERGOOD_
ASSERTION_DELAY
0xE1 Power good output assertion delay. R/W Word N L11 ms Y 100.0
0xEB20
51
MFR_WATCHDOG_T_FIRST
0xE2 First watchdog timer interval. R/W Word N L11 ms Y 0
0x8000
51
MFR_WATCHDOG_T 0xE3
Watchdog timer interval. R/W Word N L11 ms Y 0
0x8000
51
MFR_PAGE_FF_MASK
0xE4 Configuration defining which channels
respond to global page commands
(PAGE=0xFF).
R/W Byte N Reg Y 0xFF 52
MFR_PADS 0xE5 Current state of selected digital I/O pads. R Word N Reg N/A 53
MFR_I2C_BASE_ADDRESS 0xE6 Base value of the I
2
C/SMBus address
byte.
R/W Byte N Reg Y 0x5C 53
MFR_SPECIAL_ID 0xE7 Manufacturer code for identifying the
LTC2978A
R Word N Reg Y 0x0124 53
MFR_SPECIAL_LOT 0xE8 Customer dependent codes that
identify the factory programmed user
configuration stored in EEPROM. Contact
factory for default value.
R Byte Y Reg Y 54
MFR_VOUT_DISCHARGE_
THRESHOLD
0xE9 Coefficient used to multiply VOUT_
COMMAND in order to determine V
OUT
off
threshold voltage.
R/W Word Y L11 Y 2.0
0xC200
54
MFR_FAULT_LOG_STORE 0xEA Command a transfer of the fault log from
RAM to EEPROM. This causes the part to
behave as if a channel has faulted off.
Send Byte N NA 56
MFR_FAULT_LOG_RESTORE 0xEB Command a transfer of the fault log
previously stored in EEPROM back to
RAM.
Send Byte N NA 56
MFR_FAULT_LOG_CLEAR 0xEC Initialize the EEPROM block reserved for
fault logging and clear any previous fault
logging locks.
Send Byte N NA 56
MFR_FAULT_LOG_STATUS 0xED Fault logging status. R Byte N Reg Y NA 56
MFR_FAULT_LOG 0xEE Fault log data bytes. This sequentially
retrieved data is used to assemble a
complete fault log. 256 Bytes: 0xFF
followed by 255 bytes of fault log data.
R Block N Reg Y NA 57
MFR_COMMON 0xEF Manufacturer status bits that are common
across multiple LT C chips.
R Byte N Reg NA 54
MFR_SPARE_0 0xF7 Scratchpad register. R/W Word N Reg Y 0x0000 54
MFR_SPARE_1 0xF8 Manufacturer reserved. R/W Word N Reg Y NA 54
MFR_SPARE_2 0xF9 Paged scratchpad register. R/W Word Y Reg Y 0x0000 54
MFR_SPARE_3 0xFA Manufacturer reserved. R/W Word Y Reg Y NA 54
MFR_VOUT_MIN 0xFB Minimum measured
value of READ_
VOUT.
R W
ord Y L16 V NA 55
MFR_VIN_MIN 0xFC Minimum measured value of READ_VIN. R Word N L11 V NA 55
MFR_TEMPERATURE_MIN 0xFD Minimum measured value of READ_
TEMPERATURE_1.
R Word N L11 °C NA 55
PMBus COMMAND SUMMARY