Chapter 3
Hardware Overview
3-2
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Figure 3-1.
PCI/PXI-1422 Block Diagram
Differential/TTL Level Converters
The PCI/PXI-1422 can drive and receive either TTL or differential-level
camera control signals. These signal levels can be controlled independently
for the control and enable lines on the 100-pin SCSI-type connector.
LUTs
The PCI/PXI-1422 uses a 64 KB-by-16 bit lookup table (LUT) that you can
use for two 256 B-by-8 bit LUT operations or one 64 KB-by-16 bit lookup
table. You can configure this LUT to perform simple imaging operations
such as contrast enhancement, data inversion, gamma manipulation, or
other nonlinear transfer functions.
Data
100-Pin
SCSI-T
ype
Connector
Differential/
TTL
Converter
Enables
Pixel
Clock
Master
Clock
Camera
Control
UART
PCI
Bus
PCI Interface
and
Scatter-Gather
DMA Controllers
Data
IMAQ SDRAM
Memory
Interface
Synchronous Dynamic RAM
Memory
Advanced
Triggering
and Timing
Acquisition, Scaling,
ROI, and Control
External Triggers
Pixel Clock and Camera Enables
RTSI Bus
LUT
LUT
Data
Data
