Freescale Semiconductor MPC8260 - Manual (Page 33)

MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor xxxi
Contents
Paragraph
Number
Title
Page
Number
30.2.1.4 AAL2 Transmitter Overview................................................................................. 30-6
30.2.1.5 Transmit External Rate and Internal Rate Modes.................................................. 30-6
30.2.2 Receiver Overview .................................................................................................... 30-6
30.2.2.1 AAL5 Receiver Overview ..................................................................................... 30-7
30.2.2.2 AAL1 Receiver Overview ..................................................................................... 30-7
30.2.2.2.1 AAL1 CES Receiver Overview......................................................................... 30-8
30.2.2.3 AAL0 Receiver Overview ..................................................................................... 30-8
30.2.2.4 AAL2 Receiver Overview ..................................................................................... 30-8
30.2.3 Performance Monitoring............................................................................................ 30-8
30.2.4 ABR Flow Control..................................................................................................... 30-8
30.3 ATM Pace Control (APC) Unit...................................................................................... 30-8
30.3.1 APC Modes and ATM Service Types ........................................................................ 30-8
30.3.2 APC Unit Scheduling Mechanism ............................................................................. 30-9
30.3.3 Determining the Scheduling Table Size................................................................... 30-10
30.3.3.1 Determining the Cells Per Slot (CPS) in a Scheduling Table.............................. 30-10
30.3.3.2 Determining the Number of Slots in a Scheduling Table .................................... 30-10
30.3.4 Determining the Time-Slot Scheduling Rate of a Channel ..................................... 30-11
30.3.5 ATM Traffic Type .................................................................................................... 30-11
30.3.5.1 Peak Cell Rate Traffic Type................................................................................. 30-11
30.3.5.2 Determining the PCR Traffic Type Parameters ................................................... 30-11
30.3.5.3 Peak and Sustain Traffic Type (VBR) ................................................................. 30-12
30.3.5.3.1 Example for Using VBR Traffic Parameters ................................................... 30-12
30.3.5.3.2 Handling the Cell Loss Priority (CLP)—VBR Type 1 and 2 .......................... 30-13
30.3.5.4 Peak and Minimum Cell Rate Traffic Type (UBR+)........................................... 30-13
30.3.6 Determining the Priority of an ATM Channel ......................................................... 30-13
30.4 VCI/VPI Address Lookup Mechanism........................................................................ 30-13
30.4.1 External CAM Lookup ............................................................................................ 30-14
30.4.2 Address Compression .............................................................................................. 30-15
30.4.2.1 VP-Level Address Compression Table (VPLT) .................................................. 30-16
30.4.2.2 VC-Level Address Compression Tables (VCLTs)............................................... 30-17
30.4.3 Misinserted Cells ..................................................................................................... 30-18
30.4.4 Receive Raw Cell Queue ......................................................................................... 30-18
30.5 Available Bit Rate (ABR) Flow Control...................................................................... 30-19
30.5.1 The ABR Model....................................................................................................... 30-20
30.5.1.1 ABR Flow Control Source End-System Behavior .............................................. 30-20
30.5.1.2 ABR Flow Control Destination End-System Behavior ....................................... 30-21
30.5.1.3 ABR Flowcharts .................................................................................................. 30-21
30.5.2 RM Cell Structure .................................................................................................... 30-25
30.5.2.1 RM Cell Rate Representation .............................................................................. 30-26
30.5.3 ABR Flow Control Setup......................................................................................... 30-27
30.6 OAM Support .............................................................................................................. 30-27