EVAL-ADM1275EBZ Datasheet, PDF (40/48 Pages) Analog Devices – Hot-Swap Controller and Digital Power

ADM1275
Data Sheet
STATUS_INPUT
Code: 0x7C, read byte. Value after reset: 0x00.
Table 24. Bit Descriptions for STATUS_INPUT Command
Bits
Bit Name
Behavior Settings
7
VIN_OV_FAULT
Latched
0
1
6
VIN_OV_WARN
Latched
0
1
5
VIN_UV_WARN
Latched
0
1
4
VIN_UV_FAULT
[3:0]
Reserved
Latched
0
1
0000
Description
No overvoltage detected on the OV pin.
An overvoltage was detected on the OV pin.
No overvoltage condition on the input supply detected by the power
monitor.
An overvoltage condition on the input supply was detected by the power
monitor.
No undervoltage condition on the input supply detected by the power
monitor.
An undervoltage condition on the input supply was detected by the
power monitor.
No undervoltage detected on the UV pin.
An undervoltage was detected on the UV pin.
Always reads as 0000.
STATUS_MFR_SPECIFIC
Code: 0x80, read byte. Value after reset: 0x00.
Table 25. Bit Descriptions for STATUS_MFR_SPECIFIC Command
Bits
Bit Name
Behavior Settings Description
7
FET_HEALTH_BAD
Latched
0 FET behavior appears to be as expected.
1 FET behavior suggests that the FET may be shorted.
6
UV_CMP_OUT
Live
0 Input voltage to UV pin is above threshold.
1 Input voltage to UV pin is below threshold.
5
OV_CMP_OUT
Live
0 Input voltage to OV pin is below threshold.
1 Input voltage to OV pin is above threshold.
4
Reserved
0 Always reads as 0.
3
HS_INLIM
Latched
0 The ADM1275 has not actively limited the current into the load.
1 The ADM1275 has actively limited current into the load. This bit differs from
the IOUT_OC_FAULT bit in that the HS_INLIM bit is set immediately, whereas
the IOUT_OC_FAULT bit is not set unless the time limit set by the capacitor
on the TIMER pin elapses.
[2:1]
HS_SHUTDOWN_CAUSE Latched
00 The ADM1275 is either enabled and working correctly, or has been shut
down using the OPERATION command.
01 An IOUT_OC_FAULT condition occurred that caused the ADM1275 to shut down.
10 A VIN_UV_FAULT condition occurred that caused the ADM1275 to shut down.
11 A VIN_OV_FAULT condition occurred that caused the ADM1275 to shut down.
0
IOUT_WARN2
Latched
0 No overcurrent condition on the output supply detected by the power
monitor using the IOUT_WARN2_LIMIT command.
1 An undercurrent or overcurrent condition on the output supply was
detected by the power monitor using the IOUT_WARN2_LIMIT command.
The polarity of the threshold condition is set by the IOUT_WARN2_SELECT bit
using the DEVICE_CONFIG command.
READ_VIN
Code: 0x88, read word. Value after reset: 0x0000.
Table 26. Bit Descriptions for READ_VIN Command
Bits
Bit Name
Settings Description
[15:12] Reserved
0000 Always reads as 0000.
[11:0] VIN
Input voltage from the SENSE+ pin measurement, expressed in ADC codes.
Rev. D | Page 40 of 48