Motorola PowerQUICC II MPC8280 Series Reference Manual page 1218

IMA Protocol Overview
Cell n Cell 4 Cell 3
ATM
TX
Function
Links 1 - N make up an IMA group
Cell 1 Cell 2 Cell 3 Cell 4 Cell n
ATM
RX
Function
ICP cells to compensate for timing differences between links is called a "stuff event". The
transmitter is responsible for inserting "stuff" ICP (SICP) cells and the receiver will
monitor for stuff indication and discard SICP cells. The location of the ICP cell in an IMA
frame is determined during the IMA start-up sequence.
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Freescale Semiconductor, Inc.
Link ID #1
Cell 2 Cell 1
IMA TX
Function
acting as a
Virtual PHY
Link ID #N
IMA RX
Function
acting as a
Virtual PHY
MPC8280 PowerQUICC II Family Reference Manual
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Cell 1
Cell n+1
Fast
Communication
Cell 2
Controller
Cell n
Cell 1 Cell n+1
Fast
Communication
Cell 2
Controller
Cell n
Phy 1
Phy 2
Phy n
Phy 1
Phy 2
Phy n
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