GLOSSARY
Copyright 2007
Glossary 5
S SC150e HARDWARE REFERENCE
slave
--------------------------------A functional module that detects DTB cycles initiated by a master and,
when those cycles specify its participation, transfers data between itself
and the master.
slot
----------------------------------A position where a board can be inserted into a backplane. If the system
has both a J1 and a J2 backplane (or a combination J1/J2 backplane) each
slot provides a pair of 96-pin connectors. If the system has only a J1
backplane, then each slot provides a single 96-pin connector. Also,
another name for message packet.
system clock driver
--------------A functional module that provides a 16 MHz timing signal on the utility
bus.
time-out
----------------------------Also network time-out. The time written to CSR5 that must elapse before
a native message will be retransmitted. The time-out must be a non-zero
value.
Tx
-----------------------------------Abbreviation for transmit or transmitter.
UAT
--------------------------------A master that sends or receives data in an unaligned fashion.
utility bus
--------------------------One of the four buses provided by the backplane. This bus includes
signals that provide periodic timing and coordinate the power-up and
power-down of sequence of the system.
write cycle
-------------------------A DTB cycle used to transfer 1-, 2-, 3-, or 4-bytes from a master to a
slave. The cycle begins when the master broadcasts an address and
address modifier and places data on the DTB. Each slave captures this
address and address modifier, and checks to see if it is to respond to the
cycle. If so, it stores the data and then acknowledges the transfer. The
master then terminates the cycle.
Summary of Contents for SCRAMNet+ SC150e
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