©
National Instruments Corporation
3-1
PCI-4451/4452/4453/4454 User Manual
3
Hardware Overview
This chapter presents an overview of the hardware functions on your
PCI-445X. Figure 3-1 shows a block diagram of the digital functions. The
analog function block diagrams are shown in Figures 3-2 and 3-3. The
digital and analog function blocks connect through the analog mezzanine
bus.
Figure 3-1.
Digital Function Block Diagram
Direct Digital
Synthesis
Clock Generator
DAQ-STC
AI FIFO
MITE
PCI Controller
PCI Bus
AO FIFO
†
Parallel <–> Serial
Converter
FIFO and DMA
Control
General Control
Functions
Clock Control
R
TSI Bus
Digital I/O Bus
††
Analog Mezzanine Bus (to Analog Section)
Analog Mezzanine Control
†
PCI-4451/4453 only
††
PCI-4451/4452 only
