Emerson 752I Manuel D’Utilisation

 Optional RMII PHY Devices

752i User’s Manual

Table 10-2:

Table 10-3:

In addition to the four GbE ports, the Katana

752i supports an option for two RMII PHY 

devices on the Katana

752i (one for each PTMC site). These route to the CompactPCI back-

plane connector, J5. Each PTMC site has its own PHY address and LEDs, as shown in 

 and 

. See 

 for LED locations.

Table 10-4:

Note:

752i may drive the RMII REFCLK to the PTMC connectors and the PHYs. Setting bit 19 at the 

752i to stop driving REFCLK so that a PTMC module can drive it instead.

Caution:

To ensure proper signal integrity, the RTM magnetics must have a +2.5-volt offset on the 
center taps for both the TX and RX differential pairs.

1

TRD0+

5

TRD2+

2

TRD0—

6

TRD2—

3

TRD1+

7

TRD3+

4

TRD1—

8

TRD3—

1

TRD0+

5

TRD2+

2

TRD0—

6

TRD2—

3

TRD1+

7

TRD3+

4

TRD1—

8

TRD3—

 1

0x5

CR43=ACT
CR44=LINK

 2

0x6

CR45=ACT
CR46=LINK