GLOSSARY
insertion latency------------------
The time required for a GT200 card to insert data values into outgoing
frames and remove data values from incoming frames.
interrupt ---------------------------- An event that changes the normal flow of instruction execution other than
an exception or a branch, jump, case or call instruction.
interrupt acknowledge cycle----- A DTB cycle, initiated by an interrupt handler, that reads a status/ID from
an interrupter. An interrupt handler generates this cycle when it detects an
interrupt request from an interrupter and it has control of the DTB.
interrupter -------------------------- A functional module that generates an interrupt request on the priority
interrupt bus and then provides states/ID information when the interrupt
handler requests it.
interrupt handler------------------- A functional module that detects interrupt requests generated by
interrupters and responds to those requests by asking for status/ID
information.
ISR ---------------------------------- Interrupt service routine. A routine executed when a device interrupt
occurs.
loopback---------------------------- A method of transmitting to the same node’s receivers for testing
purposes. Applies to both fiber optic and wire media. Also, a test that
loops the outgoing signal back to its source.
master------------------------------- A functional module that initiates DTB cycles to transfer data between
itself and a slave module.
native message--------------------- A message that is received by the node of origin.
pass-through latency -------------- The time required for a GT200 card to process an incoming frame and
retransmit it on the network.
point-to-point topology----------- A network topology in which one node connects directly to another node.
priority interrupt bus-------------- One of the four buses provided by the backplane. The priority interrupt
bus allows interrupter modules to send interrupt requests to interrupt
handler modules, and interrupt handler modules to acknowledge these
interrupt requests.
PIO ---------------------------------- Programmed I/O transfer. An I/O transfer, primarily conducted by a
driver program, that requires processor intervention after each byte or
word is transferred. Contrast with Direct Memory Access (DMA)
transfer.
ring topology----------------------- A network topology in which every node has exactly two branches
connected to it.
rising edge-------------------------- The time during which a signal makes its transition from low to high.
Rx ----------------------------------- Abbreviation for receive or receiver.
Copyright 2005
GLOSSARY-2
GT200 Hardware Reference
Содержание GT200
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