Datasheet

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Data Sheet ADM1276

Rev. C | Page 37 of 48

VIN_OV_WARN_LIMIT

Code: 0x57, read/write word. Value after reset: 0x0FFF.

Table 16. Bit Descriptions for VIN_OV_WARN_LIMIT Command

Bits Bit Name Settings Description

[15:12] Reserved 0000 Always reads as 0000.

[11:0] VIN_OV_WARN_LIMIT Overvoltage threshold for the SENSE+ pin measurement, expressed in ADC codes.

VIN_UV_WARN_LIMIT

Code: 0x58, read/write word. Value after reset: 0x0000.

Table 17. Bit Descriptions for VIN_UV_WARN_LIMIT Command

Bits Bit Name Settings Description

[15:12] Reserved 0000 Always reads as 0000.

[11:0] VIN_UV_WARN_LIMIT Undervoltage threshold for the SENSE+ pin measurement, expressed in ADC codes.

PIN_OP_WARN_LIMIT

Code: 0x6B, read/write word. Value after reset: 0x7FFF.

Table 18. Bit Descriptions for PIN_OP_WARN_LIMIT Command

Bits Bit Name Settings Description

[15] Reserved 0 Always reads as 0.

[14:0] PIN_OP_WARN_LIMIT Overpower threshold for the VIN × IOUT power calculation.

STATUS_BYTE

Code: 0x78, read byte. Value after reset: 0x00.

Table 19. Bit Descriptions for STATUS_BYTE Command

Bits

Bit Name

Behavior

Settings

Description

[7] Reserved 0 Always reads as 0.

[6] HOTSWAP_OFF Live 0 The hot swap gate drive output is enabled.

The hot swap gate drive output is disabled, and the GATE pin is pulled

down. This can be due to, for example, an overcurrent fault that causes

the ADM1276 to latch off, an undervoltage condition on the UV pin, or

the use of the OPERATION command to turn the output off.

[5] Reserved 0 Always reads as 0.

[4] IOUT_OC_FAULT Latched 0 No overcurrent output fault detected.

The hot swap controller detected an overcurrent condition and the time

limit set by the capacitor on the TIMER pin has elapsed, causing the hot

swap gate drive to shut down.

[3] VIN_UV_FAULT Latched 0 No undervoltage input fault detected on the UV pin.

1 An undervoltage input fault was detected on the UV pin.

[2] Reserved 0 Always reads as 0.

[1] CML_ERROR Latched 0 No communications error detected on the I

C/PMBus interface.

An error was detected on the I

C/PMBus interface. Errors detected are an

unsupported command, an invalid PEC byte, and an incorrectly

structured message.

[0] NONE_OF_THE_ABOVE Live 0 No other active status bit to be reported by any other status command.

1 Active status bits are waiting to be read by one or more status commands.