® White Paper

OpenCore Plus Hardware Evaluationwith the APEX DSP Development Kit

A-WP-DSPOPENCORE-1.0

The Altera® APEX™ DSP development kit includes trial versions of Altera DSP MegaCore® functions that you can test-drive using the OpenCore® Plus hardware evaluation feature. When you install the MegaCore functions provided on the APEX DSP Development Kit CD-ROM, the time-limited library—required to perform hardware evaluation—installs automatically. The following functions are available with the kit:

■ FFT/IFFT■ FIR Compiler■ NCO Compiler■ Reed-Solomon Compiler (Encoder and Decoder)■ Symbol Interleaver/Deinterleaver

This white paper describes the length of time each MegaCore function operates before it expires and the operation of the MegaCore function output signals after the function expires. For up-to-date information on expiration behavior, refer to the Time Limit Warning message boxes displayed by the time-limited MegaCore function wizards.

1 Refer to AN 176: OpenCore Plus Hardware Evaluation for more information about the OpenCore Plus feature and how to use it in your design flow.

FFT

The FFT MegaCore function expires after 270,000,000,000 clock cycles of the clock input sysclk, which allows approximately 30 minutes of operation at 150 MHz. Table 1 shows the operation of the function’s output signals upon expiration.

FIR Compiler

The FIR compiler MegaCore function expires after 270,000,000,000 clock cycles of the clock input clock, which allows approximately 30 minutes of operation at 150 MHz. Table 2 shows the operation of the function’s output signals upon expiration.

Table 1. FFT Output Signals

Signal Operation

realdataout Driven low

imagdataout Driven low

readaddress Driven low

writeaddress Driven low

twidaddress Driven low

timed_out Driven from low to high

Table 2. FIR Compiler Output Signals

Signal Operation

fir_result Driven low

timed_out Driven from low to high

September 2001, ver. 1.0 1

Altera Corporation OpenCore Plus Hardware Evaluation with the APEX DSP Development Kit White Paper

NCO Compiler

The NCO compiler MegaCore function expires after 270,000,000,000 clock cycles of the clock input clk, which allows approximately 30 minutes of operation at 150 MHz. Table 3 shows the operation of the function’s output signals upon expiration.

Reed-Solomon Compiler (Encoder)

The Reed-Solomon Encoder MegaCore function expires after 270,000,000,000 cycles of the clock input sysclk, which allows approximately 30 minutes of operation at 150 MHz. Table 4 shows the operation of the function’s output signal upon expiration.

Reed-Solomon Compiler (Decoder)

The Reed-Solomon Decoder MegaCore function expires after 270,000,000,000 cycles of the clock input sysclk, which allows approximately 30 minutes of operation at 150 MHz. Table 5 shows the operation of the function’s output signals upon expiration.

Symbol Interleaver/Deinterleaver

The symbol interleaver/deinterleaver MegaCore function expires after 270,000,000,000 cycles of the clock input clk, which allows approximately 30 minutes of operation at 150 MHz. Table 6 shows the operation of the function’s output signals upon expiration.

Table 3. NCO Compiler Output Signals

Signal Operation

fsin_o Driven low

fcos_o Driven low

timed_out Driven from low to high

Table 4. Reed-Solomon Encoder Output Signals

Signal Operation

rsout Driven low

timed_out Driven from low to high

Table 5. Reed-Solomon Decoder Output Signals

Signal Operation

rsout Driven low

timed_out Driven from low to high

Table 6. Symbol Interleaver/Deinterleaver Output Signals

Signal Operation

All address and data signals Driven to values present at time of expiration

timed_out Driven from low to high

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Altera Corporation OpenCore Plus Hardware Evaluation with the APEX DSP Development Kit White Paper

Copyright 2001 Altera Corporation. Altera, The Programmable Solutions Company, the stylized Altera logo, specific device designations,and all other words and logos that are identified as trademarks and/or service marks are, unless noted otherwise, the trademarks and servicemarks of Altera Corporation in the U.S. and other countries. All other product or service names are the property of their respective holders.Altera products are protected under numerous U.S. and foreign patents and pending applications, maskwork rights, and copyrights. Alterawarrants performance of its semiconductor products to current specifications in accordance with Altera’s standard warranty, but reserves theright to make changes to any products and services at any time without notice. Altera assumes no responsibility or liability arising out of theapplication or use of any information, product, or service described herein except as expressly agreed to in writing by Altera Corporation.Altera customers are advised to obtain the latest version of device specifications before relying on any published information and beforeplacing orders for products or services. All rights reserved.

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