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7721 Datasheet(PDF) 462 Page - Renesas Technology Corp |
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7721 Datasheet(HTML) 462 Page - Renesas Technology Corp |
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462 / 577 page  APPLICATION 7721 Group User’s Manual 16–59 16.3 Comparison of sample program execution rate Figure 16.3.3 shows that there is almost no difference between conditions and about the execution time. The bus buffers become unnecessary when using the specified memory. (Refer to “Table 16.1.6.”) Considering this, the case where software Wait is inserted with f(XIN) = 20 MHz (condition ) is superior in the cost performance. 1.10 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 Work area = Internal RAM 1.00 1.04 1.00 1.01 1.10 1.00 0.90 0.80 0.70 0.60 0.50 0.40 0.30 0.20 0.10 0.00 Sample B excution time ratio 1.00 1.05 1.00 1.03 : Condition : Condition Work area = External RAM Work area = Internal RAM Work area = External RAM Sample A excution time ratio Fig. 16.3.3 Execution time ratio |
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