Datasheet

LTC2977
26
2977fa
For more information www.linear.com/LTC2977
PMBus COMMAND SUMMARY
Summary Table
COMMAND NAME
CMD
CODE DESCRIPTION TYPE PAGED
DATA
FORMAT UNITS EEPROM
DEFAULT
VALUE
REF
PAGE
MFR_FAULTB00_
RESPONSE
0xD5 Action to be taken by the device when the
FAULTB00 pin is asserted low.
R/W Byte N Reg Y 0x00 52
MFR_FAULTB01_
RESPONSE
0xD6 Action to be taken by the device when the
FAULTB01 pin is asserted low.
R/W Byte N Reg Y 0x00 52
MFR_FAULTB10_
RESPONSE
0xD7 Action to be taken by the device when the
FAULTB10 pin is asserted low.
R/W Byte N Reg Y 0x00 52
MFR_FAULTB11_
RESPONSE
0xD8 Action to be taken by the device when the
FAULTB11 pin is asserted low.
R/W Byte N Reg Y 0x00 52
MFR_VINEN_OV_FAULT_
RESPONSE
0xD9 Action to be taken by the V
IN_EN
pin in
response to a VOUT_OV_FAULT
R/W Byte N Reg Y 0x00 53
MFR_VINEN_UV_FAULT_
RESPONSE
0xDA Action to be taken by the V
IN_EN
pin in
response to a VOUT_UV_FAULT
R/W Byte N Reg Y 0x00 54
MFR_RETRY_DELAY 0xDB Retry interval during FAULT retry mode. R/W Word N L11 ms Y 200.0
0xF320
55
MFR_RESTART_DELA
Y 0xDC Delay from actual CONTROL active edge
to virtual CONTROL active edge.
R/W Word N L11 ms Y 400.0
0xFB20
55
MFR_VOUT_PEAK
0xDD Maximum measured value of READ_
VOUT.
R Word Y L16 V NA 56
MFR_VIN_PEAK 0xDE Maximum measured value of READ_VIN. R Word N L11 V NA 56
MFR_TEMPERATURE_
PEAK
0xDF Maximum measured value of READ_
TEMPERATURE_1.
R Word N L11 °C NA 56
MFR_DAC 0xE0 Manufacturer register that contains the
code of the 10-bit DAC.
R/W Word Y Reg 0x0000 57
MFR_POWERGOOD_
ASSERTION_DELAY
0xE1 Power good output assertion delay. R/W Word N L11 ms Y 100.0
0xEB20
57
MFR_WATCHDOG_T_FIRST
0xE2 First watchdog timer interval. R/W Word N L11 ms Y 0
0x8000
64
MFR_WATCHDOG_T
0xE3 Watchdog timer interval. R/W Word N L11 ms Y 0
0x8000
64
MFR_PAGE_FF_MASK
0xE4 Configuration defining which channels
respond to global page commands
(PAGE=0xFF).
R/W Byte N Reg Y 0xFF 29
MFR_PADS 0xE5 Current state of selected digital I/O pads. R Word N Reg N/A 58
MFR_I2C_BASE_ADDRESS 0xE6 Base value of the I
2
C/SMBus address
byte.
R/W Byte N Reg Y 0x5C 29
MFR_SPECIAL_ID 0xE7 Manufacturer code for identifying the
LTC2977
R Word N Reg Y 0x0130 59
MFR_SPECIAL_LOT 0xE8 Customer dependent codes that
identify the
factory programmed user
configuration stored in EEPROM. Contact
factor
y for default value.
R Byte Y Reg Y 59
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
59
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 67