Marvin Test Solutions GX5280, Руководство пользователя

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20 GX5280 User Guide
Trigger
Registers
Trigger/Pause
Logic
Run-Time Program
Control
Counter
Registers
Programmable
Oscillator
10MHz
Data Out
Memory
Array
Output Enable
Programmable Levels
LVDS
PXI
Interface
External
CLK
CLK STB
Trigger/Pause
External Events
PXI Trigger
Bus
Data Bus
PXI Star
Trigger
Figure 4-1: Architecture Diagram
Masters and Slaves
The DIO System (a DIO Domain) is made up of Master and Slave(s) circuit boards. The Master board can be
connected to a maximum of 15 Slave boards expanding the number of channels in the domain. All external inputs,
external clocks/strobes and controls are done primarily through the Master only.
The Master distributes clock, control and status signals to all the Slaves in the domain through the PXI Bus.
Any GX5280 board can be a Master or a Slave depends on the on-board switch settings (see Chapter 3). Although
Master/Slave transformation can only be done when the system is shutdown.
I/O Channels
The operation of a GX5280 board is best understood by studying the operation of a single I/O channel.
Figure 4-2 displays a simplified block diagram of a single I/O channel. This diagram shows how one channel
functions.