EVAL-ADM1275EBZ Datasheet, PDF (39/48 Pages) Analog Devices – Hot-Swap Controller and Digital Power

Data Sheet
ADM1275
STATUS_WORD
Code: 0x79, read word. Value after reset: 0x0000.
Table 21. Bit Descriptions for STATUS_WORD Command
Bits
Bit Name
Behavior Settings
15
VOUT_STATUS
Live
0
1
14
IOUT_STATUS
Live
0
1
13
VIN_STATUS
Live
0
1
12
MFR_STATUS
Live
0
1
11
POWER_GOOD#
Live
0
1
[10:8] Reserved
000
[7:0]
STATUS_BYTE
Description
There are no active status bits to be read by STATUS_VOUT.
There are one or more active status bits to be read by STATUS_VOUT.
There are no active status bits to be read by STATUS_IOUT.
There are one or more active status bits to be read by STATUS_IOUT.
There are no active status bits to be read by STATUS_INPUT.
There are one or more active status bits to be read by STATUS_INPUT.
There are no active status bits to be read by STATUS_MFR_SPECIFIC.
There are one or more active status bits to be read by STATUS_MFR_SPECIFIC.
The voltage on the FLB pin is above the required threshold, indicating
that output power is considered good. This bit is the logical inversion of
the PWRGD pin on the part.
The voltage on the FLB pin is below the required threshold, indicating
that output power is considered bad.
Always reads as 000.
This byte is the same as the byte returned by the STATUS_BYTE command.
STATUS_VOUT
Code: 0x7A, read byte. Value after reset: 0x00.
This command is supported on the ADM1275-1 and the ADM1275-3. The ADM1275-2 does not have a VOUT pin.
Table 22. Bit Descriptions for STATUS_VOUT Command
Bits
Bit Name
Behavior Settings
7
Reserved
0
6
VOUT_OV_WARN
Latched
0
1
5
VOUT_UV_WARN
Latched
0
1
[4:0]
Reserved
00000
Description
Always reads as 0.
No overvoltage condition on the output supply detected by the power
monitor.
An overvoltage condition on the output supply was detected by the
power monitor.
No undervoltage condition on the output supply detected by the power
monitor.
An undervoltage condition on the output supply was detected by the
power monitor.
Always reads as 00000.
STATUS_IOUT
Code: 0x7B, read byte. Value after reset: 0x00.
Table 23. Bit Descriptions for STATUS_IOUT Command
Bits
Bit Name
Behavior Settings
7
IOUT_OC_FAULT
Latched
0
1
6
Reserved
5
IOUT_OC_WARN
[4:0]
Reserved
Latched
0
0
1
00000
Description
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.
Always reads as 0.
No overcurrent condition on the output supply detected by the power
monitor using the IOUT_OC_WARN_LIMIT command.
An overcurrent condition was detected by the power monitor using the
IOUT_OC_WARN_LIMIT command.
Always reads as 00000.
Rev. D | Page 39 of 48