Rainbow Electronics MAX5971B - Manual (Page 28)

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MAX5971B
Single-Port, 40W, IEEE 802.3af/at,
PSE Controller with I 2 C
Detect Event Register (R04h/R05h)
The detect event register (R04h/R05h, Table 10) 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_END and CL_END are
set high whenever detection/classification is completed.
As with the other event registers, the detect event reg-
ister 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 11) records load
removal and overcurrent events for the port. On power-up
or after a reset condition, the fault event register is set to
a default value of 00h. LD_DISC is set to 1 whenever
the port shuts down due to detection of load removal.
IMAX_FLT is set to 1 when the port shuts down due to an
extended overcurrent event after a successful startup.
As with the other events registers, the fault event reg-
ister 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.
Reserved Registers (R08h/R09h)
Registers R08h/R09h are at this time reserved. Writing
to this register has no effect (the address autoincre-
ment still updates) and any attempt to read this register
returns all zeros.
Table 10. Detect Event Register
Table 11. Fault Event Register
ADDRESS = 04h 05h
DESCRIPTION
SYMBOL BIT NO. TYPE R/W
Reserved 7 — — Reserved
Reserved 6 — — Reserved
Reserved 5 — — Reserved
CL_END 4 R CoR Classification completed on the port
Reserved 3 — — Reserved
Reserved 2 — — Reserved
Reserved 1 — — Reserved
DET_END 0 R CoR Detection completed on the port
ADDRESS = 06h 07h
DESCRIPTION
SYMBOL BIT NO. TYPE TYPE
Reserved 7 — — Reserved
Reserved 6 — — Reserved
Reserved 5 — — Reserved
LD_DISC 4 R CoR Disconnect on the port
Reserved 3 — — Reserved
Reserved 2 — — Reserved
Reserved 1 — — Reserved
IMAX_FLT 0 R CoR Overcurrent on the port