LTM4677 datasheet(67/116 Pages) AD

67 / 116 page

LTC3883/LTC3883-1

Rev. F

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MFR_ADDRESS

The MFR_ADDRESS command byte sets the 7 bits of the PMBus slave address for this device.

Setting this command to a value of 0x80 disables device addressing. The GLOBAL device address, 0x5A and 0x5B,

cannot be deactivated. If RCONFIG is set to ignore, the ASEL pin is still used to determine the LSB of the channel ad-

dress. If the ASEL pin is open, the LTC3883 will use the address value stored in NVM.

This command has one data byte.

MFR_RAIL_ADDRESS

The MFR_RAIL_ADDRESS command enables direct device address access to the PAGE activated channel. The value

of this command should be common to all devices attached to a single power supply rail.

The user should only perform command writes to this address. If a read is performed from this address and the rail

devices do not respond with EXACTLY the same value, the LTC3883 will detect bus contention and may set a CML

communications fault.

Setting this command to a value of 0x80 disables rail device addressing for the channel.

This command has one data byte.

GENERAL CONFIGURATION COMMANDS

COMMAND NAME

CMD CODE DESCRIPTION

TYPE

DATA

FORMAT UNITS

NVM

DEFAULT

VALUE

MFR_CHAN_CONFIG_LTC3883

0xD0

Configuration bits that are channel specific.

R/W Byte

Reg

0x1F

MFR_CONFIG_ALL_LTC3883

0xD1

General configuration bits.

R/W Byte

Reg

0x09

MFR_CHAN_CONFIG_LTC3883

General purpose configuration command common to multiple ADI products.

BIT

MEANING

Reserved

Disable RUN Low. When asserted the RUN pin is not pulsed low if commanded OFF

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.

SHARE_CLOCK control. If SHARE_CLOCK is held low, the output is disabled

No GPIO ALERT, ALERT is not pulled low if GPIO is pulled low externally.

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.

PMBus COMMAND DETAILS

LTM4677 Datasheet(PDF) 67 Page - Analog Devices

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