ADM-XRC SDK 2.5.0b1 User Guide (Linux)
© Copyright 2001-2005 Alpha Data


Introduction to the local bus

This section provides a brief primer to the protocol used on the local bus common to the Alpha Data Xilinx Reconfigurable Coprocessor range. The key features of the local bus are:

The differences between the models in the ADM-XRC range can be summarized by the following table:

Feature ADM-XRC
ADM-XRC-P
ADM-XRC-II-Lite ADM-XRC-II
ADP-WRC-II
ADP-DRC-II
ADM-XPL ADM-XP
ADP-XPI
ADM-XRC-4LX
ADM-XRC-4SX
Max. local bus frequency 40.0MHz 40.0MHz 66.67MHz 80.0MHz
(see note 1 below)
80.0MHz 66.67MHz
Multiplexed address/data No No No Yes Yes No
Supported data widths on local bus 32 bits 32 bits 32 bits 32 bits,
64 bits
32 bits,
64 bits
32 bits
Local bus bridge PCI9080 PCI9080 PCI9656 Virtex-II Virtex-II PCI9656

Note 1: If logic revision from INFO utility is 1.2 or greater, max. LCLK frequency is 80MHz; otherwise 66.67MHz.

Click on one of the following topics for more information:

Local bus signals

Direct slave transfers

DMA transfers

Arbitration

Direct master transfers

Tips on local bus interface design

 


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