![background image](http://html1.mh-extra.com/html/national-instruments/daqcard-dio-24/daqcard-dio-24_user-manual_709163105.webp)
© National Instruments Corporation
I-1
DAQCard-DIO-24 User Manual
Index
Numbers
+5 V signal
cable connector (table), 4-6
description (table), 4-3
82C55A CNFG Register, B-2 to B-3
control-word formats, B-3
single bit set/reset feature, B-3
82C55A Programmable Peripheral Interface
data sheet, C-1 to C-17
overview, 3-1 to 3-2
82C55A programming considerations, B-7
to B-25
82C55A modes of operation, B-7
interrupt handling, B-24 to B-25
interrupt programming examples, B-22
to B-24
Mode 0, B-7 to B-8
Mode 0 basic I/O, B-9 to B-10
Mode 0 programming example, B-10
to B-11
Mode 1, B-8
Mode 1 input programming example, B-14
to B-15
Mode 1 output programming example, B-17
to B-18
Mode 1 strobed input, B-12 to B-13
Mode 1 strobed output, B-15 to B-17
Mode 2, B-8
Mode 2 bidirectional bus, B-18 to B-20
Mode 2 programming example, B-21
to B-22
single bit set/reset feature, B-9
A
ACK* signal (table), 4-9
B
bits
IBFA
Mode 1 strobed input, B-12
Mode 2 bidirectional bus, B-19
IBFB, B-13
INTE1, B-19
INTE2, B-20
INTEA
Mode 1 strobed input, B-13
Mode 1 strobed output, B-16
INTEB
Mode 1 strobed input, B-13
Mode 1 strobed output, B-16
INTEN, B-5
INTRA
Mode 1 strobed input, B-13
Mode 1 strobed output, B-16
Mode 2 bidirectional bus, B-20
INTRB
Mode 1 strobed input, B-13
Mode 1 strobed output, B-16
I/O
Mode 1 strobed input, B-12
Mode 1 strobed output, B-16
Mode 2 bidirectional bus, B-20
IRQ0, B-5
IRQ1, B-4 to B-5