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AN4031 Datasheet(PDF) 5 Page - STMicroelectronics |
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AN4031 Datasheet(HTML) 5 Page - STMicroelectronics |
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5 / 36 page ![]() DocID022648 Rev 1 5/36 AN4031 List of figures 5 List of figures Figure 1. DMA block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 2. Channel selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 3. DMA source address and destination address incrementing . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 4. FIFO structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 5. DMA burst transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 6. Double-buffer mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 7. System architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 8. CPU and DMA1 request an access to SRAM1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 9. Five masters request SRAM access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 10. DMA transfer delay due to CPU transfer issued by interrupt . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 11. DMA dual port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 12. Peripheral-to-memory transfer states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Figure 13. Memory-to-peripheral transfer states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 14. DMA request arbitration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 15. AHB-to-APB1 bridge concurrent CPU and DMA1 access request . . . . . . . . . . . . . . . . . . . 26 Figure 16. SPI full duplex DMA transfer time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 |
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