PowerPC Bus Arbiter
Features
- Compatible with all PowerPC bus architectures
- Manages up to 8 bus masters
- Supports address pipelining, address only transaction, address retry, and separate address and data bus tenure
- Fixed and rotating priority
Block Diagram
Figure 1 shows the block diagram for the PowerPC bus arbiter megafunction.
| Figure 1. Block Diagram |
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Description
The PowerPC bus arbiter megafunction arbitrates the PowerPC address and data buses to allow multiple bus masters or processors to co-exist on the host bus. The megafunction is designed for the PowerPC host bus and works with all PowerPC central processing unit (CPU) families and embedded controllers. The megafunction can be used as a stand-alone function or it can be incorporated in the same device with the bus master or slaves. Both fixed and round-robin priority schemes can be implemented with the arbiter.
To maximize system performance, the megafunction supports advanced features of the PowerPC bus, such as address pipelining, address retry, bus parking, and separate arbitration for the address and data buses. The megafunction allows address pipelining with two outstanding memory accesses.
The megafunction is available in Altera Hardware Description Language (AHDL), Verilog HDL, VHDL, and netlist format. Megafunction sizes vary with customization and with feature changes. Contact Eureka Technology directly for an LE count that is based on user specifications.
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) |
| EPF10K10 |
-3 |
110 |
0 |
50 MHz |
8 ports, fixed-priority architecture scheme, and highest-priority bus parking |
| EPF6016 |
-2 |
110 |
- |
50 MHz |
| EPM7128 |
-1 |
70 |
- |
66 MHz |
Note:
- EABs = Embedded array blocks
Contact Information
For additional information, you can 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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