LTC2977 datasheet(124/138 Pages) AD

124 / 138 page

LTM4664A

124

Rev. 0

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STATUS_MFR_SPECIFIC

The STATUS_MFR_SPECIFIC commands returns one byte with the manufacturer specific status information.

The format for this byte is:

BIT MEANING

Internal Temperature Fault Limit Exceeded.

Internal Temperature Warn Limit Exceeded.

Factory Trim Area NVM CRC Fault.

PLL is Unlocked

Fault Log Present

VDD33 UV or OV Fault

Short-cycle Event Detected

FAULT Pin Asserted Low by External Device

If any of these bits are set, the MFR bit in the STATUS_WORD will be set, and ALERT may be asserted.

The user is permitted to write a 1 to any bit in this command to clear a specific fault. This permits the user to clear

status by means other than using the CLEAR_FAULTS command. However, the fault log present bit can only be cleared

by issuing the MFR_FAULT_LOG_CLEAR command.

Any supported fault bit in this command will initiate an ALERT event.

This command has one data byte.

PMBus COMMAND DETAILS

MFR_PADS

This command provides the user a means of directly reading the digital status of the I/O pins of the device. The bit

assignments of this command are as follows:

BIT ASSIGNED DIGITAL PIN

VDD33 OV Fault

VDD33 UV Fault

Reserved

ADC Values Invalid, Occurs During Start-Up. May Occur Briefly on Current Measurement Channels During Normal Operation

SYNC clocked by external device (when LTM4664A configured to drive SYNC pin)

Channel 1 Power Good

Channel 0 Power Good

LTM4664A Driving RUN1 Low

LTM4664A Driving RUN0 Low

RUN1 Pin State

RUN0 Pin State

LTM4664A Driving FAULT1 Low

LTM4664A Driving FAULT0 Low

FAULT1 Pin State

FAULT0 Pin State

A 1 indicates the condition is true.

This read-only command has two data bytes.

LTC2977 Datasheet(PDF) 124 Page - Analog Devices

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