
DATA SHEET
PM7367 FREEDM-32P32
ISSUE 2
PMC-1991499
FRAME ENGINE AND DATA LINK MANAGER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMER’S INTERNAL USE
ii
CONTENTS
1
FEATURES...............................................................................................1
2
APPLICATIONS........................................................................................3
3
REFERENCES .........................................................................................4
4
BLOCK DIAGRAM....................................................................................5
5
DESCRIPTION.........................................................................................6
6
PIN DIAGRAM..........................................................................................8
7
PIN DESCRIPTION..................................................................................9
8
FUNCTIONAL DESCRIPTION ...............................................................30
8.1
HIGH-LEVEL DATA LINK CONTROL PROTOCOL......................30
8.2
RECEIVE CHANNEL ASSIGNER................................................31
8.2.1
LINE INTERFACE..........................................................32
8.2.2
PRIORITY ENCODER...................................................32
8.2.3
CHANNEL ASSIGNER ..................................................32
8.2.4
LOOPBACK CONTROLLER .........................................33
8.3
RECEIVE HDLC PROCESSOR / PARTIAL PACKET BUFFER...33
8.3.1
HDLC PROCESSOR.....................................................33
8.3.2
PARTIAL PACKET BUFFER PROCESSOR..................34
8.4
RECEIVE DMA CONTROLLER...................................................36
8.4.1
DATA STRUCTURES ....................................................36
8.4.2
DMA TRANSACTION CONTROLLER...........................46
8.4.3
WRITE DATA PIPELINE/MUX.......................................46
8.4.4
DESCRIPTOR INFORMATION CACHE........................46