Datasheet

LTC3883/LTC3883-1
90
3883fa
For more information www.linear.com/LTC3883
Fault Sharing Response
COMMAND NAME CMD CODE DESCRIPTION TYPE
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
MFR_GPIO_RESPONSE 0xD5 Action to be taken by the device when the GPIO pin
is asserted low.
R/W Byte Reg Y 0xC0
MFR_GPIO_RESPONSE
This command determines the controller’s response to the GPIO pin being pulled low by an external source.
VALUE MEANING
0xC0 GPIO_INHIBIT The LTC3883 will three-state the output in response to the GPIO pin pulled low.
0x00 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_LT C 3883.
This command has one data byte.
SCRATCHPAD
COMMAND NAME CMD CODE DESCRIPTION TYPE
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
USER_DATA_00 0xB0 OEM reserved. Typically used for part serialization. R/W Word Reg Y NA
USER_DATA_01 0xB1 Manufacturer reserved for LTpowerPlay. R/W Word Reg Y NA
USER_DATA_02 0xB2 OEM reserved. Typically used for part serialization. R/W Word Reg Y NA
USER_DATA_03 0xB3 A NVM word available for the user. R/W Word Reg Y 0x0000
USER_DATA_04 0xB4 A NVM word available for the user. R/W Word Reg 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.
IDENTIFICATION
COMMAND NAME CMD CODE DESCRIPTION TYPE
DATA
FORMAT UNITS NVM
DEFAULT
VALUE
PMBUS_REVISION 0x98 PMBus revision supported by this device. Current revision is 1.1. R Byte Reg FS 0x11
CAPABILITY 0x19 Summary of PMBus optional communication protocols
supported by this device.
R Byte Reg 0xB0
MFR_ID 0x99 The manufacturer ID of the LTC3883 in ASCII. R String ASC LT C
MFR_MODEL 0x9A Manufacturer part number in ASCII. R String ASC LTC3883
MFR_SPECIAL_ID 0xE7 Manufacturer code representing the LTC3883. R Word Reg 0x430X
PMBus COMMAND DETAILS