PCI Bus Arbiter
Features
- Complies with PCI bus specification 2.2
- Designed for programmable logic device (PLD) and ASIC implementation in various system environments
- Fully static design with edge-triggered flip-flops
- Supports two to any number of bus masters
- Bus parking
- Fast request-to-grant turnaround time
- Quiet cycle during master switch
- Master time-out
Block Diagram
Figure 1 shows the block diagram for the PCI bus arbiter megafunction.
| Figure 1. Block Diagram |
 |
Description
The PCI bus arbiter performs bus arbitration among multiple masters on the PCI bus. Any number of bus masters can reside on the PCI bus, as well as requests for the bus. One pair of request and grant signals is dedicated to each bus master.
The PCI bus arbiter implements either rotating priority or a fixed priority scheme. In the rotating priority scheme, the requestor that is most recently granted the bus receives the lowest priority, while the requestor position next to it receives the highest priority. The remaining requestor receives subsequently lower priority based on its position.
This megafunction is available in Altera hardware description language (AHDL), Verilog, VHDL, and netlist format. Megafunction sizes vary with features and customization. Eureka Technology can customize the design according to specific user requirements. Please contact Eureka Technology or visit the Eureka Technology web site for a complete data sheet.
Device Utilization Example
Table 1 lists the typical device utilization results for the megafunction.
| Table 1. Typical Device Utilization for
the Megafunction |
| Device |
Speed Grade |
Utilization |
Performance
(fMAX) |
Parameter Setting |
| Logic Cells |
EABs (1) |
FLEX
APEX
ACEX |
|
250 |
0 |
33 MHz |
Contact
Eureka Technology |
Note:
- EABs = Embedded array blocks
Contact Information
For additional information, contact Eureka Technology, Inc. at:
Eureka Technology, Inc.
4962 El Camino Real
Suite 108
Los Altos, CA 94022
Tel. (650) 960-3800
Fax (650) 960-3805
E-mail: info@eurekatech.com
WWW: http://www.eurekatech.com
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