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Quad, IEEE 802.3at/af PSE Controller
for Power-over-Ethernet
Detect Event Register (R04h/R05h)
The Detect Event register (R04h/R05h, Table 9) records
detection/classification events for the port. On power-up
or after a reset condition, the Detect Event register is set
to a default value of 00h. DET_ and CLS_ are set high
whenever detection/classification is completed on the
corresponding port. As with the other event registers,
the Detect Event register has two addresses. When read
through the R04h address, the content of the register
is left unchanged. When read through the CoR R05h
address, the register content is reset to the default state.
Fault Event Register (R06h/R07h)
The Fault Event register (R06h/R07h, Table 10) records
port DC load and overcurrent disconnect timeout events.
On power-up or after a reset condition, the Fault Event
register is set to a default value of 00h. DIS_ is set to 1
whenever a port shuts down due to a DC load discon-
nect event. TCUT_ is set to 1 when a port shuts down
due to an extended overcurrent event after a success-
ful startup. As with the other events registers, the Fault
Event register has two addresses. When read through
the R06h address, the content of the register is left
unchanged. When read through the CoR R07h address,
the register content is reset to the default state.
Table 9. Detect Event Register
ADDRESS =
SYMBOL BIT NO.
04h
TYPE
05h
TYPE
DESCRIPTION
CLS4
CLS3
CLS2
CLS1
DET4
DET3
DET2
DET1
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
CoR
CoR
CoR
CoR
CoR
CoR
CoR
CoR
Classification completed on port 4
Classification completed on port 3
Classification completed on port 2
Classification completed on port 1
Detection completed on port 4
Detection completed on port 3
Detection completed on port 2
Detection completed on port 1
Table 10. Faul t Event Register
ADDRESS =
SYMBOL BIT NO.
06h
TYPE
07h
TYPE
DESCRIPTION
DIS4
DIS3
DIS2
DIS1
TCUT4
TCUT3
TCUT2
TCUT1
7
6
5
4
3
2
1
0
R
R
R
R
R
R
R
R
CoR
CoR
CoR
CoR
CoR
CoR
CoR
CoR
DC load disconnect timeout on port 4
DC load disconnect timeout on port 3
DC load disconnect timeout on port 2
DC load disconnect timeout on port 1
Overcurrent disconnect timeout on port 4
Overcurrent disconnect timeout on port 3
Overcurrent disconnect timeout on port 2
Overcurrent disconnect timeout on port 1
32
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