M. Harte, Howard

8051 Slave to Wishbone Master Interface

## Description

Interface an 8051-compatible microcontroller with the Wishbone bus.

## Features

\- Multiplexed 8051 address/data bus to Wishbone Master  
\- Very simple, very small.  
\- Since 8051 has no way to add additional wait-states via an external pin, the Wishbone must be fast enough to complete the cycle in time for the 8051.

## Status

\- Tested with Silicon Labs C8051 Microcontroller and Xilinx Coolrunner2 CPLD.  
\- Tested with Silicon Labs C8051 Microcontroller and Xilinx Spartan3 FPGA.  
\- this core is used in the Altair32 Front Panel: www.altair32.com


<h2 id="description">Description</h2>
<p>Interface an 8051-compatible microcontroller with the Wishbone bus.</p>
<h2 id="features">Features</h2>
<p>- Multiplexed 8051 address/data bus to Wishbone Master<br />
- Very simple, very small.<br />
- Since 8051 has no way to add additional wait-states via an external pin, the Wishbone must be fast enough to complete the cycle in time for the 8051.</p>
<h2 id="status">Status</h2>
<p>- Tested with Silicon Labs C8051 Microcontroller and Xilinx Coolrunner2 CPLD.<br />
- Tested with Silicon Labs C8051 Microcontroller and Xilinx Spartan3 FPGA.<br />
- this core is used in the Altair32 Front Panel: www.altair32.com</p>


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8051 Slave to Wishbone Master Interface

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