Chapter 3
Hardware Overview
3-2
ni.com
Figure 3-1.
PCI-1424 Block Diagram
Signaling
The PCI-1424 is available in two different versions. The RS-422/TTL
version can drive and receive RS-422 and TTL-level signals. NI-IMAQ can
control these signals independently for data, control, and enable lines on
the 100-pin connector. The LVDS/TTL version, also known as EIA-644,
can drive and receive LVDS- and TTL-level signals. Benefits of LVDS
include less power consumption, longer cable lengths, less noise, and
higher clock rates.
LUTs
You can configure the PCI-1424 to use either four 8-bit or two 10-bit to
16-bit lookup tables (LUTs) to perform LUT operations such as contrast
enhancement, data inversion,
manipulation, or other nonlinear
transfer functions.
Data
100-Pin SCSI-T
ype Connector
Differential/
TTL
Converter
Enables
Pixel
Clock
Camera
Control
UART
LUT
PCI Bus
PCI Interface
and
Scatter-Gather
DMA Controllers
Data
IMAQ SDRAM
Memory
Interface
Data
Data
Synchronous Dynamic RAM
Memory
Advanced
Triggering
and Timing
Acquisition,
ROI, and Control
External Triggers
Pixel Clock and Camera Enables
RTSI Bus