PXF4333 Datasheet, PDF (95/361 Pages) Infineon Technologies AG – ABM 3G ATM Buf fer Manager

ABM-3G
PXF 4333 V1.1
Functional Description
“Scheduler Configuration Table Integer Transfer Registers” on Page 257 and
“Scheduler Configuration Table Fractional Transfer Registers” on Page 267
provide the details.
3.5.8 MGT: Merge Group Table
The function of the MGT table (for 128 merge groups per direction) is to enable and
specify the cell header overwrite function for the merge group output streams.
“Merge Group Table Transfer Registers” on Page 230 provides the details.
3.5.9 AVT: VBR Configuration Table
The AVT table is the main context RAM of the VBR shaping sub-system.
3.5.9.1 AVT Context RAM Organization and Addressing
The AVT Context RAM addressing scheme imposes some restrictions to the choice of
QID numbers for support of VBR shaping. The table is organized into 2 K sections of 4
double words (32-bit) each whereas each section corresponds to the respective QID
number.
Support of VBR shaping requires one section per connection, i.e. up to 2k-1 connections
assigned to QID numbers (1, ..., 2047) can be supported for VBR shaping.
QID 0 is reserved for the common real-time queue.
Data Sheet
95
2001-12-17