MAX5952CUAX+【PDF 32/50 页】IC PSE CNTRLR FOR POE 36-SSOP

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Sheet目录43

28页 29页 30页 31页 [32页]33页 34页 35页 36页

High-Power, Quad, PSE Controller

for Power-Over-Ethernet

32 ______________________________________________________________________________________

Setting DCD_EN_ to 1 enables the DC load disconnect

detection feature (Table 17). Setting ACD_EN_ to 1

enables the AC load disconnect feature. If enabled, the

load disconnect detection starts during power mode

and after startup when the corresponding PGOOD_ bit

in register R10h (Table 14) goes high. A reset sets

R13h = 0000AAAA where A represents the latched-in

state of the AUTO input prior to the reset.

Table 16. Mode Register

ADDRESS = 12h

SYMBOL

BIT

R/W

DESCRIPTION

P4_M1

R/W

MODE[1] for port 4

P4_M0

R/W

MODE[0] for port 4

P3_M1

R/W

MODE[1] for port 3

P3_M0

R/W

MODE[0] for port 3

P2_M1

R/W

MODE[1] for port 2

P2_M0

R/W

MODE[0] for port 2

P1_M1

R/W

MODE[1] for port 1

P1_M0

R/W

MODE[0] for port 1

Table 17. Load Disconnect Detection Enable Register

ADDRESS = 13h

SYMBOL

BIT

R/W

DESCRIPTION

ACD_EN4

R/W

Enable AC disconnect detection on port 4

ACD_EN3

R/W

Enable AC disconnect detection on port 3

ACD_EN2

R/W

Enable AC disconnect detection on port 2

ACD_EN1

R/W

Enable AC disconnect detection on port 1

DCD_EN4

R/W

Enable DC disconnect detection on port 4

DCD_EN3

R/W

Enable DC disconnect detection on port 3

DCD_EN2

R/W

Enable DC disconnect detection on port 2

DCD_EN1

R/W

Enable DC disconnect detection on port 1

Table 16a. Mode Status

MODE

DESCRIPTION

Shutdown

Manual

Semi-auto

Auto

The MAX5952 uses two bits for each port to set the mode

of operation. Set the modes according to Table 16a.

A reset sets R12h = AAAAAAAA where A represents

the latched-in state of the AUTO input prior to the reset.

Use software to change the mode of operation.

Software resets of ports (RESET_P_ bit, Table 23) do

not affect the mode register.

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