Motorola PowerQUICC II MPC8280 Series Reference Manual page 1287

Chapter 35
ATM Transmission Convergence Layer
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.
UTOPIA level-2 8-/16-bit bus
SIx
TDMx
Figure 35-1. Serial ATM Using FCC2 and TC Blocks (Single Channel)
MOTOROLA
Freescale Semiconductor, Inc.
NOTE
UTOPIA level-2 8-bit bus
TC
Blocks
Chapter 35. ATM Transmission Convergence Layer
For More Information On This Product,
Go to: www.freescale.com
FCC1
FCC2
DPR
FCC3
35-1