ADM-XRC SDK 2.5.0 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
Max. local bus frequency 40.0MHz 40.0MHz 66.67MHz
Multiplexed address/data No No No
Supported data widths on local bus 32 bits 32 bits 32 bits
Local bus bridge PCI9080 PCI9080 PCI9656

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