National Instruments Module SCXI-1503 Uživatelský manuál stáhnout pdf (Strana 25)

Chapter 2 Connecting Signals

SCXI-1503 User Manual 2-12 ni.com

26 SER DAT OU

P0.4 Output Serial data out—this signal taps

into the SCXIbus MISO line to

accept serial output data from a

module.

27 DAQ D*/A P0.1 Input Board data/address line—this

signal taps into the SCXIbus D*/A

line to indicate to the module

whether the incoming serial stream

is data or address information.

29 SLOT 0 SEL* P0.2 Input Slot 0 select—this signal taps into

the SCXIbus INTR* line to indicate

whether the information on MOSI

is being sent to a module or Slot 0.

36 SCAN CLK AI HOLD COMP,

AI HOLD

Input Scan clock—a rising edge indicates

to the scanned SCXI module that

the E/M Series DAQ device has

taken a sample and causes the

module to advance channels.

37 SER CLK EXTSTROBE* Input Serial clock—this signal taps into

the SCXIbus SPICLK line to clock

the data on the MOSI and MISO

lines.

43, 46 RSVD RSVD Input Reserved.

Note: All other pins are not connected.

Table 2-4. SCXI-1503 50-Pin Rear Connector Signals (Continued)

SCXI

Signal Name

NI-DAQmx

Device Signal

Name

Direction Description

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 78 79

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National Instruments Module SCXI-1503 Uživatelský manuál Strana 25