National Instruments 653X Manuale Utente

© National Instruments Corporation

stop trigger

change detection, 2-28
pattern I/O, 2-19 to 2-20

system integration, by National 

Instruments, F-1

technical support resources, F-1 to F-2
terminating cables. See cable selection and 

termination.

timing diagrams, 3-1 to 3-40

handshaking I/O, 3-4 to 3-40

8255-emulation protocol, 

3-12 to 3-17

asynchronous protocol, 3-12
burst protocol, 3-5 to 3-11
comparing different protocols 

(table),  3-4 to 3-5

edge-based protocols, 3-24
leading-edge protocol, 3-29 to 3-34
level-ACK protocol, 3-18 to 3-23
long-pulse protocol, 3-35 to 3-40
trailing-edge protocol, 3-25 to 3-28

pattern I/O, 3-1 to 3-3

external REQ signal source, 

3-2 to 3-3

internal REQ signal source, 

3-1 to 3-2

trailing-edge handshaking 

protocol, 3-25 to 3-28

comparison of protocols 

(table), 3-4 to 3-5

definition, 3-24
input state machine (figure), 3-25
input timing diagram (figure), 3-26
maximum transfer rate (table), E-3
output state machine (figure), 3-27
output timing diagram (figure), 3-28

transferring data. See data transfer.

trigger bus interfaces. See RTSI and PXI 

trigger bus interfaces.

trigger specifications

RTSI triggers (PCI, PXI, AT), A-3
start and stop triggers, A-3

triggering data transfer

change detection, 2-27 to 2-30

pattern-matching trigger, 

2-29 to 2-30

start and stop trigger, 2-28 to 2-29
start trigger, 2-28
stop trigger, 2-28

pattern I/O, 2-19 to 2-21

pattern-matching trigger (input only), 

2-20 to 2-21

start and stop trigger, 2-20 to 2-21
start trigger, 2-19
stop trigger, 2-19 to 2-20

unpacking 653X devices, 1-5 to 1-6
unstrobed I/O, 2-2 to 2-6

configuring digital lines, 2-2 to 2-3

standard output, 2-2
wired-OR output, 2-2 to 2-3

Port 4 lines (table), 2-4
programming, 2-4 to 2-6

control/timing lines as extra 

unstrobed data lines, 2-5 to 2-6

flowcharts, 2-5

using control lines as extra unstrobed data 

lines, 2-3 to 2-4

when to use (table), 2-1

VirtualBench software, 1-3