Scxibus Connector And Digital Interface; Digital Interface Circuitry Block Diagram - National Instruments SCXI-1120/D User Manual

SCXIbus Connector and Digital Interface

Buffered Serial
Data
Buffered Digital
Signal Controls
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Figure 4-2 shows a diagram of the SCXI-1120/D and SCXIbus digital
interface circuitry.
Digital Interface
Figure 4-2. Digital Interface Circuitry Block Diagram
The digital interface circuitry is divided into a data acquisition section
and an SCXIbus section. The SCXI-1120/D connects to the SCXIbus
through a 4 × 24 metral receptacle and to the DAQ device through a 50-pin
ribbon-cable header. The digital interface circuitry buffers the digital
signals from the DAQ device and the SCXIbus and sends signals back and
forth between the DAQ device and the SCXIbus.
SCXIbus
SERDATIN
DAQD*/A
SLOT0SEL*
SERCLK
SERDATOUT
4-3
Chapter 4 Theory of Operation
SCXI-1120/D User Manual