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STE100A датащи(PDF) 19 Page - STMicroelectronics |
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STE100A датащи(HTML) 19 Page - STMicroelectronics |
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19 / 82 page ![]() STE10/100A Functional description 19/82 3.4 Receive scheme and receive early interrupt scheme The following figure shows the difference of timing without early interrupt and with early interrupt. Figure 12. Receive data flow (without early interrupt and with early interrupt) Figure 13. Detailed receive early interrupt flow Incoming packet Receive FIFO operation FIFO-to-host memory operation Interrupt Driver read header Higher layer process Driver read the rest data Receive early interrupt Higher layer process (early) Time : without early interrupt : with early interrupt Driver read the rest data Finish time Finish time Driver read header (early) PC00357 FIFO-to-host memory operation Receive early interrupt Driver read header (early) Higher layer process (early) Driver read the rest data Finish 1st descriptor full 2descriptor The size of 1st descriptor is programmed as the header size in advance Issue 2 interrupt at end of packet Time PC00358 |
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