MPC8280 datasheet(615/1386 Pages) FREESCALE

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CPM Multiplexing

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

16-3

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FCC2 can also be connected also to the TC layer (MPC8280 only).

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Each SCC can have its own set of modem control pins.

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Each SMC can have its own set of four pins.

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Each FCC, SCC, and SMC can be driven from a bank of twenty clock pins or a bank of eight BRGs.

The multiple-PHY addressing selection supports the following options for FCC1 and FCC2:

•

In master mode:

— FCC1 connect up to 31 PHYs and FCC2 connect up to 31 PHYs.

— FCC1 connect up to 15 PHYs and FCC2 connect up to 15 PHYs.

— FCC1 connect up to 7 PHYs and FCC2 connect up to 31 PHYs.

•

In slave mode:

— FCC1 connect up to 31 PHYs and FCC2 connect to 0 PHYs.

— FCC1 connect up to 15 PHYs and FCC2 connect up to 1 PHYs.

— FCC1 connect up to 7 PHYs and FCC2 connect up to 3 PHYs.

— FCC1 connect up to 3 PHYs and FCC2 connect up to 7 PHYs.

— FCC1 connect up to 1 PHYs and FCC2 connect up to 15 PHYs.

— FCC1 connect to 0 PHYs and FCC2 connect up to 31 PHYs.

16.2

Enabling Connections to TSA or NMSI

Each serial device can be independently enabled to connect to the TSA or to dedicated external pins, as

shown in Figure 16-2. Each FCC can be connected to a dedicated MII or to the eight TDMs. FCC1 can

also be connected to an 8- or 16-bit UTOPIA level-2 interface. FCC2 can also be connected to an 8-bit

UTOPIA level-2 interface. Each SCC or SMC can be connected to the eight TDMs or to its own set of

pins. Once connections are made to the TSA, the exact routing decisions are made in the SIx RAMs.

MPC8280 Datasheet(PDF) 615 Page - Freescale Semiconductor, Inc