PXF4336 Datasheet, PDF (122/425 Pages) Infineon Technologies AG – ABM Premium ATM Buf fer Manager

ABM-P
PXF 4336 V1.1
Functional Description
Table 3-54 AVT Context Table: ABR-VS/VD Parameter Description (cont’d)
Parameter
Initial
Value
Comment
CCRf*(15:0)
0
Current Cell Rate field in generated FRM cells; set
equal to ACRf* according to TM4.1
ERb*(15:0)
PCRf
Explicit Rate extracted from received BRM cells;
used together with CIb/NIb to calculate ACRf
ERt*(15:0)
PCRf
Explicit Rate extracted from received FRM cells;
latest value is stored for transparent forwarding in
generated BRM cells
CIt/NIt
0
Latest CI/NI values extracted from received FRM
cells; stored for transparent loop back to the
remote destination in generated BRM cells
FInRateCount(5:0) 0
Count all (user and RM cells) InRate events -
Check against Nrm (>=2, default 32), Nrm is FW
constant in Cache
LastFRMSent(3:0) 0
Count 10ms Cnt events - Check against Trm
(default 100ms => 10d), Trm is global register
value
LastInRateSent(9:0) 0
Count 10ms Cnt events - Check against ADTF
CRM(5:0)
32
Max. number of RM cells in the loop, granularity 16:
16, 32, 48, 64, ...1024; constant connection
parameter
CRMcnt(9:0)
0
Current number of RM cells in the loop
TPf(15:0)
TPi
Time Parameter corresponding to the Allowed Cell
Rate (ACR), resulted from ACR calculation for up-
or downstream PCR limiter; only one of them may
be enabled using the configuration bit 3
(ABR_FWD_Enable)
Note: The cell header template is used for generating new BRM cells. It is overwritten
by each incoming FRM cell. It is necessary to initialize these fields because BRM
cells might be generated before the first FRM cell comes in.
Data Sheet
122
2001-12-17