AN910 datasheet(4/51 Pages) STMICROELECTRONICS

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ST7 AND ST9 PERFORMANCE BENCHMARKING

3 BENCHMARK RESULTS

3.1 CORE COMPUTING PERFORMANCE

The two following charts show benchmark results for computing performance. Execution time

and code size are presented as global ratios taken the ST9+ as reference.

Preliminary ratios have been calculated for each test. Using those results, a global execution

time ratio and a global code size ratio have been calculated as an average of all ratios. As all

the tests could not have been implemented on all MCUs (see <Italic>9.2.2 Memory

considerations<Italic end>), one or two different results are presented for each MCU. The

first one, available for all the MCUs, has been calculated with the reduced set of tests

performed on all the MCUs. The second one, only available for some MCUs, has been

calculated with the full set of tests.

Refer to section 6 for complete results. Refer to section 9 for measurement proceeding and

calculation description.

Figure 1. presents execution time ratios and Figure 2. shows code size ratios.

Notes: The reduced set of tests is composed of:

string, char, bubble(10 words), blkmov(64 bytes), convert, 16mul, shright, bitrst

The full set of tests is composed of:

string, char, bubble(10 words), blkmov(64 bytes), convert, 16mul, shright, bitrst,

sieve, acker(3,5), acker(3,6), bubble(600 words), blkmov(512 bytes)

The 80C51 results are preliminary results. They may change in later versions.

AN910 データシート(PDF) 4 Page - STMicroelectronics