Motorola MPC8260 - Manual (Page 805)

29-25 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
Part IV. Communications Processor Module
Figure 29-14. ABR Receive Flow
29.5.2 RM Cell Structure
Table 29-7 describes the structure of the RM cell supported by the MPC8260. For more
information, see the ABR ßow-control trafÞc management speciÞcation (TM 4.0) on the
ATM Forum website at http://www.atmforum.com.
B-RM Cells Rx
CI = 1
ACR = ACR-ACR ´RDF
NI = 0
ACR = ACR+RIF ´PCR
ACR = min(ACR,PCR)
ACR = min(ACR,ER)
ACR = max(ACR,MCR)
BN = 0
Unack = 0
EXIT
The source generate this RM
Unack = Number of F-RM in absence of B-RM = 0
Source End-Sys 5
Source End-Sys 1, 6
Source End-Sys 5, 6
Yes
No
Yes
No
No
Yes