MPC8280 datasheet(1217/1386 Pages) FREESCALE

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MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

35-1

Chapter 35

ATM Transmission Convergence Layer

NOTE

The functionality described in this chapter is available only on the

MPC8280.

The MPC8280 can support applications which receive ATM traffic over the standard serial protocols like

E1, T1, and xDSL via its serial interface (SIx TDMx) ports because the ATM TC-layer functionality is

implemented internally. This allows the use of standard low-cost PHY devices in system applications

instead of PHYs that support UTOPIA bus devices.

A typical TC layer application requires the use of one SI TDM channel per TC block. As shown in

Figure 35-1, all TC blocks are internally connected to FCC2. In addition, Figure 35-1 shows FCC1

connected to a UTOPIA 16-bit MPHY bus which can be routed outside and operated independently of the

TC blocks.

Figure 35-1. Serial ATM Using FCC2 and TC Blocks (Single Channel)

FCC2

FCC1

UTOPIA level-2 8-/16-bit bus

DPR

TDMx

FCC3

SIx

UTOPIA level-2 8-bit bus

Blocks

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