Ethernet Interfaces: Optional RMII PHY Devices
10006024-04 Katana®752i User’s Manual 10-3
Table 10-2: 82544EI Ethernet Port Pin Assignments, ETH4
Table 10-3: MV64460 Ethernet Port Pin Assignments, ETH3
OPTIONAL RMII PHY DEVICES
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 Table10-
4 and Fig.10-1. See Fig. 2-3 for LED locations.
Table 10-4: PTMC PHY Address
Note: The Katana®752i may drive the RMII REFCLK to the PTMC connectors and the PHYs. Setting bit 19 at the
MV64460 MPP port enables this functionality. However, before setting the bit, ensure that the RMII PHYs are
installed and the PT2MC card supports an RMII interface. By default, REFCLK is enabled (bit is high). Clearing
this bit causes the Katana®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.
Pin Signal Pin Signal
1TRD0+ 5TRD2+
2TRD0— 6TRD2—
3TRD1+ 7TRD3+
4TRD1— 8TRD3—
Pin Signal Pin Signal
1TRD0+ 5TRD2+
2TRD0— 6TRD2—
3TRD1+ 7TRD3+
4TRD1— 8TRD3—
PTMC Site: PHY Address: LEDs:
1 0x5 CR43=ACT
CR44=LINK
2 0x6 CR45=ACT
CR46=LINK
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