Chapter 2
Functional Overview
©
National Instruments Corporation
2-3
•
The PCI video circuitry is a PCI-based design that has a 64-bit data
path to up to 2 MB of SGRAM. It also contains a TFT LCD Interface
which is used in the National Instruments PXI-1020 and PXI-1025
chassis, and supports Windows 98 dual display: LCD and CRT.
•
The USB connector connects the chip set to the Universal Serial Bus
interface.
•
The PXI connector connects the PXI-8150B to the PXI/CompactPCI
backplane.
•
The Keyboard/Mouse block contains the PS/2 keyboard and mouse
interface.
•
The BIOS/RTC block contains the boot BIOS and the Real Time Clock
interface.
•
The Watchdog Timer block is the circuitry that, once configured,
signals if the timer is not refreshed. Refer to the
drivers.txt
file
located in the
C:\Images\PXI815
xB directory
for more
information on configuring and using the watchdog timer.
The daughter card module has the following logic blocks:
•
The Ethernet block on the PXI-8156B is an ISA-based Ethernet
circuit. It uses an RJ-45 connector for access to an external
Ethernet-based LAN.
•
The GPIB logic block represents the IEEE 488.2 port on the
PXI-8156B model. It uses the National Instruments TNT4882 ASIC
for maximum performance as an ISA-based GPIB controller.
•
The PC Peripherals blocks represent the other peripherals supplied by
the PXI-8150B Series. The PXI-8155B has one serial port, an
ECP/EPP parallel port, and a 1.44 MB, 3.5 in. floppy drive. The
PXI-8156B adds a second serial port.
•
The IDE block is dedicated PCI-IDE circuitry providing fast ATA-3
transfers to the internal hard drive. The IDE feature is built into the
chip set.
