Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
APPENDIX A NOMENCLATURE
A.1 Definitions
Transmit (egress) signals: all signals related to processing the data heading towards the optical/
electrical layer.
Receive (ingress) signals: all signals related to processing the data heading towards the ATM
layer.
A.2 Signal Name Prefixes
Many pins have prefixes indicating the function with which they are associated (refer to Table
48).
Table 48. Prefixes and Associated Functions
Pin Name Prefixes
Associated Functions
RATM
RAM
RX
Receive direction of UTOPIA ATM
RAM Interface
Receive
JTAG
TATM
TX
JTAG Interface
Transmit direction of UTOPIA ATM
Transmit
A.3 Numbers
•
•
•
Hexadecimal numbers are followed by the suffix “h”, for example: 1h, 2Ch.
Binary numbers are followed by the suffix “b”, for example: 00b.
Decimal numbers appear without suffixes.
A.4 Glossary of Abbreviations
Abbreviation
Description
AAL
AAL1
AAL5
ABR
ACK
AL
ATM Adaptation Layer
ATM Adaptation Layer 1
ATM Adaptation Layer 5
Available Bit Rate
Acknowledgment
Address Lookup (as in AL RAM)
ATM
BECN
BP
Asynchronous Transfer Mode or ATM Layer
Backwards Explicit Congestion Notification
Backpressure
BPACK
Backpressure Acknowledgment
232
PMC [ PMC-SIERRA, INC ]
