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1.2 Description
The NHi-15504 is a PCI card which contains a completely independent 1553 interface. The interface
uses a NHi-15625ET multi-protocol MCM . which can operate as an RT, BC, or MT.
The ET includes two monolithic transceivers, a protocol asic and 64K words of shared RAM. Double
buffering of the shared RAM enables simultaneous message preparation
and 1553 bus transfers.
All modes of operation access data tables via pointers residing in RAM which
facilitates multiple buffering. This allows buffers to change without moving data and promotes efficient
use of RAM space. The data tables have programmable
sizes and locations.
The invisibility of memory when the card is not active prevents inadvertent access
during power-on-self test of the PC or by any other process.
2.0 Inspection
The card has been thoroughly tested and inspected before shipment. After removing the
card from the packing container, please retain the container as it may be used to store the
card when not installed in the computer. The packing container may be utilized in the event that the card
has to be returned due to failure or damage.
2.1 System Requirements
PC with PCI Bus
Windows2000/ME/XP/98/NT
Hard disk
Color Monitor
Follow these precautions before installing the card inside your PC. Remove power to the
PC before opening the top cover. Make the necessary switch and jumper selections for your
application as detailed in this manual and then plug the card into an available slot on the motherboard.
The card has been delivered from the factory with the following default settings:
IRQ from the terminals are software disabled.
Hardwire RT address 01 (via jumper blocks).
