Motorola PowerQUICC II MPC8280 Series Reference Manual page 1038

Available Bit Rate (ABR) Flow Control
Send RM (DIR = forward, CCR = ACR, ER = PCR, CI = NI = 0, CLP =1)
31-24
Freescale Semiconductor, Inc.
Start Channel Tx
No
ACR < TCR
Yes
Schedule: Time_to_send = now+1/TCR
EXIT
ACR>=TCR
RM/DATA In Rate Cell Tx
Figure 31-11. ABR Transmit Flow
MPC8280 PowerQUICC II Family Reference Manual
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Source End-Sys 9
ACR is low sent only
out-of-rate cells at TCR
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