Datasheet

LTC3880/LTC3880-1
65
3880fc
For more information www.linear.com/LTC3880
GENERAL CONFIGURATION REGISTERS
COMMAND NAME CMD CODE DESCRIPTION TYPE PAGED
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
MFR_CHAN_CONFIG_LTC3880 0xD0 Configuration bits that are channel specific. R/W Byte Y Reg Y 0x1F
MFR_CONFIG_ALL_LTC3880 0xD1 Configuration bits that are common to all
pages.
R/W Byte N Reg Y 0x09
MFR_CHAN_CONFIG_LTC3880
General purpose configuration command common to multiple LTC products.
BIT MEANING
7 Reserved
6 Reserved
5 Reserved
4 Disable RUN Low. When asserted the RUN pin is not pulsed low if commanded OFF
3 Short Cycle. When asserted the output will immediate off if commanded ON while waiting for TOFF_DELAY or TOFF_FALL. TOFF_MIN of 120mS
is honored then the part will command ON.
2 SHARE_CLOCK control, if SHARE_CLOCK is held low, the output is disabled
1 No GPIO ALERT, ALERT is not pulled low if GPIO is pulled low externally. Assert this bit if either POWER_GOOD or VOUT_UVUF are propagated
on GPIO
0 Disables the VOUT decay value requirement for MFR_RETRY_TIME processing. When this bit is set to a 0, the output must decay to less than
12.5% of the programmed value for any action that turns off the rail including a fault, an OFF/ON command, or a toggle of RUN from high to low
to high.
This command has one data byte.
MFR_CONFIG_ALL_LTC3880
General purpose configuration command common to multiple LTC products
BIT MEANING
7 Enable Fault Logging
6 Ignore Resistor Configuration Pins
5 Reserved, set to 1
4 Reserved
3 Mask PLL Unlock Fault
2 A valid PEC required for PMBus writes to be accepted. If this bit is not
set, the part will accept commands with invalid PEC.
1 Enable the use of PMBus clock stretching
0 Enables a low to high transition on either RUN pin to issue a
CLEAR_FAULTS command
This command has one data byte.
PMBus COMMAND DETAILS