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Chapter 2 DAQ System Overview
NI 6238/6239 User Manual 2-2 ni.com
Figure 2-2. General NI 6238/6239 Block Diagram
DAQ-STC2
The DAQ-STC2 implements a high-performance digital engine for
NI 6238/6239 data acquisition hardware. Some key features of this engine
include the following:
• Flexible AI and AO sample and convert timing
• Many triggering modes
• Independent AI and AO FIFOs
• Generation and routing of RTSI signals for multi-device
synchronization
• Generation and routing of internal and external timing signals
• Two flexible 32-bit counter/timer modules with hardware gating
• Static DIO signals
• PLL for clock synchronization
• PCI/PXI interface
• Independent scatter-gather DMA controllers for all acquisition and
generation functions
P1.GND
P1
Analog Output
Analog Input
PFI/Static DI
PFI/Static DO
Digital
Routing
and Clock
Generation
Bus
Interface
I/O Connector
RTSI
Digital
Isolators
Isolation
Barrier
Bus
Counters
P0.GND
AO GND
AI GND
P0
A
A
A