
IBM2520L8767
IBM Processor for ATM Resources
Table of Contents
Page ii
atmrm.toc.01
08/27/99
Memory I/O Cross Reference By Device Type ....................................................................................23
Possible Memory Configurations Using DRAM With Shared ECC ...................................................24
Possible Memory Configurations Using SRAM ..................................................................................24
NPBUS ....................................................................................................................................................25
NPBUS Connections .............................................................................................................................25
NPBUS Pin Descriptions ......................................................................................................................26
ATM PHY Bus Interface ........................................................................................................................28
ATM PHY Bus Interface Connections ..................................................................................................28
PHY Bus Pin Descriptions ....................................................................................................................29
Transmit PHY I/O Cross Reference .....................................................................................................31
Receive PHY I/O Cross Reference .......................................................................................................31
Clock, Configuration, and LSSD Connections ...................................................................................32
Clock, Configuration, and LSSD Pin Descriptions .............................................................................33
Data Structures ............................................................................................................... 35
Packet Header ........................................................................................................................................35
Transmit Packet Header Structure ......................................................................................................35
Receive Packet Header Structure ........................................................................................................36
Transmit and Receive Packet Header Field Descriptions .................................................................36
Logical Channel Data Structure ...........................................................................................................38
Transmit Descriptor Data Structures .................................................................................................39
Scheduling Portion of a Transmit Descriptor .....................................................................................40
Transmit Logical Channel Descriptor Structure ................................................................................41
Redefinition of Shared and Segmentation Portion of Transmit LCD for ABR .................................42
Redefinition of Segmentation Portion of Transmit LCD for fixed size AAL5 blocking ...................43
Redefinition of Segmentation Portion of Transmit LCD for MPEG2 .................................................44
Redefinition of Scheduling Portion of Transmit LCD for ABR ..........................................................45
Redefinition of Scheduling Portion of Transmit LCD for timers .......................................................45
Definition of LCD-Based Memory Management of Transmit LCD ....................................................45
Field Definitions ................................................................................................................................46
Definition of ABR code variables .........................................................................................................46
ABR Code Variables Definitions ..........................................................................................................46
Receive LCD Data Structure and Modes ..........................................................................................53
Transmit Data Structure Linkage .........................................................................................................53
Raw LCD ...........................................................................................................................................54
Raw LCD Layout ....................................................................................................................................54
Raw Routed LCD ..............................................................................................................................55
Raw Routed LCD Layout ......................................................................................................................55
Raw Cut Through LCD ......................................................................................................................56
Raw Cut Through LCD Layout .............................................................................................................56
Raw FIFO LCD .................................................................................................................................57
Raw FIFO LCD Layout ...........................................................................................................................57
Receive FIFO Buffer Layouts ...............................................................................................................58
AAL5 LCD .........................................................................................................................................59
AAL5 LCD Layout ..................................................................................................................................59
AAL5 Routed LCD Layout ....................................................................................................................60
AAL5 Cut-Through Mode 6 LCD .......................................................................................................61