LTC3883 Datasheet, PDF (90/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
PMBus Command Details
Fault Sharing Response
COMMAND NAME
MFR_GPIO_RESPONSE
CMD CODE DESCRIPTION
TYPE
0xD5 Action to be taken by the device when the GPIO pin R/W Byte
is asserted low.
DATA
FORMAT
Reg
UNITS
DEFAULT
NVM VALUE
Y
0xC0
MFR_GPIO_RESPONSE
This command determines the controller’s response to the GPIO pin being pulled low by an external source.
VALUE
0xC0
0x00
MEANING
GPIO_INHIBIT The LTC3883 will three-state the output in response to the GPIO pin pulled low.
GPIO_IGNORE The LTC3883 continues operation without interruption.
The device also:
• Sets the NONE_OF_THE_ABOVE bit in the STATUS_BYTE
• Sets the MFR bit in the STATUS_WORD
• Sets the GPIOB bit in the STATUS_MFR_SPECIFIC command, and notifies the host by asserting ALERT pin. The
ALERT pin pulled low can be disabled by setting bit[1] of MFR_CHAN_CFG_LTC3883.
This command has one data byte.
Scratchpad
COMMAND NAME
USER_DATA_00
USER_DATA_01
USER_DATA_02
USER_DATA_03
USER_DATA_04
CMD CODE DESCRIPTION
0xB0 OEM reserved. Typically used for part serialization.
0xB1 Manufacturer reserved for LTpowerPlay.
0xB2 OEM reserved. Typically used for part serialization.
0xB3 A NVM word available for the user.
0xB4 A NVM word available for the user.
TYPE
R/W Word
R/W Word
R/W Word
R/W Word
R/W Word
DATA
FORMAT
Reg
Reg
Reg
Reg
Reg
UNITS
DEFAULT
NVM VALUE
Y
NA
Y
NA
Y
NA
Y
0x0000
Y
0x0000
USER_DATA_00  through USER_DATA_04
These commands are non-volatile memory locations for customer storage. The customer has the option to write any
value to the USER_DATA_nn at any time. However, the LTpowerPlay software and contract manufacturers use some
of these commands for inventory control. Modifying the reserved USER_DATA_nn commands may lead to undesirable
inventory control and incompatibility with these products.
These commands have 2 data bytes and are in register format.
3883f
90