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Technical Data
The following table gives an overview about the RTX Flash File System performance on different Evaluation Boards.
| Board | Device | CPU Core | CPU Speed [MHz] | Card Interface | Write [KB/s] | Read [KB/s] |
| AT91SAM9260-EK | Atmel AT91SAM9160 | ARM9 | 96.1 | SD4 at 25MHz | 4785.0 | 5044.0 |
| AT91SAM9261-EK | Atmel AT91SAM9161 | ARM9 | 96.1 | SD4 at 25MHz | 4790.6 | 5069.3 |
| AT91SAM9G20-EK | Atmel AT91SAM9G20 | ARM9 | 99.1 | SD4 at 25MHz | 4899.5 | 5418.0 |
| AT91SAM9RL-EK | Atmel AT91SAM9RL64 | ARM9 | 100.0 | SD4 at 25MHz | 4096.0 | 5211.2 |
| MCB2400 | NXP LPC2468 | ARM7 | 48.0 | SD4 at 24MHz | 4084.3 | 5525.9 |
| MCB2300 | NXP LPC2368 | ARM7 | 48.0 | SD4 at 24MHz | 3946.3 | 5330.6 |
| MCB2140 | NXP LPC2148 | ARM7 | 60.0 | SPI at 7.5MHz | 299.4 | 313.4 |
| MCBSTR9 | ST STR912 | ARM9 | 48.0 | SPI at 12MHz | 355.2 | 357.1 |
| MCBSTR750 | ST STR750 | ARM7 | 60.0 | SPI at 15MHz | 402.2 | 416.1 |
| MCBSTM32 | ST STM32 | Cortex-M3 | 72.0 | SPI at 18MHz | 711.1 | 758.1 |
| LM3S8962 | Luminary LM3S8962 | Cortex-M3 | 50.0 | SPI at 12.5MHz | 537.8 | 607.6 |
| LM3S6965 | Luminary LM3S6965 | Cortex-M3 | 50.0 | SPI at 12.5MHz | 539.2 | 603.6 |
| LM3S3768 | Luminary LM3S3768 | Cortex-M3 | 50.0 | SPI at 12.5MHz | 539.5 | 603.8 |
Performance test procedure
- Initialize the Card for testing:
- Format the Card
- Open the file "Test.txt"
- Prewrite 4MB of file data with 0x55
- Close and Delete the file - Write performance test:
- Open the file "Test.txt"
Start the measurement timer
- Write 4MB of data in 4KB blocks
Stop the measurement timer
- Close the file - Read performance test:
- Open the file "Test.txt"
Start the measurement timer
- Read 4MB of data in 4KB blocks
Stop the measurement timer
- Close the file - Test validity check:
- Open the file "Test.txt"
- Verify 4MB of data in 4KB blocks
- Close and Delete the file
Note
- SD Cards: SanDisk Extreme III (1GB) and Kingston (1GB) were used for testing.
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