Chapter 10 digital routing and clock generation, Clock routing, Figure 10-1. m series clock routing circuitry – National Instruments DAQ M Series User Manual

Page 110: Clock routing -1, R 10, Digital routing, And clock generation, So refer to the, Digital, Routing and clock generation

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10-1

NI 6236 User Manual

10

Digital Routing and Clock
Generation

The digital routing circuitry has the following three main functions.

Manages the flow of data between the bus interface and the
acquisition/generation sub-systems (analog input, analog output,
digital I/O, and the counters). The digital routing circuitry uses FIFOs
(if present) in each sub-system to ensure efficient data movement.

Routes timing and control signals. The acquisition/generation
sub-systems use these signals to manage acquisitions and generations.
These signals can come from the following sources.

Your M Series device

Other devices in your system through RTSI

User input through the PFI terminals

User input through the PXI_STAR terminal

Routes and generates the main clock signals for the M Series device.

Clock Routing

Figure 10-1 shows the clock routing circuitry of an M Series device.

Figure 10-1. M Series Clock Routing Circuitry

RTSI <0..7>

Onboard

80 MHz

Oscillator

External

Reference

Clock

(To RTSI <0..7>
Output Selectors)

10 MHz RefClk

PLL

ч

4

ч

200

ч 8

PXI_CLK10

PXI_STAR

80 MHz Timebase

100 kHz Timebase

20 MHz Timebase

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