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UM0290 データシート(PDF) 39 Page - STMicroelectronics |
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UM0290 データシート(HTML) 39 Page - STMicroelectronics |
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39 / 76 page  UM0290 Mass storage demo 39/76 Figure 8. Mass storage file architecture This implementation uses the internal RAM like memory support. In fact the internal RAM is divided into the following three different areas (see Figure 9): ● General purpose memory area: this part of memory is used by the firmware to store internal variables. ● Medium memory area: this part of memory is dedicated to the user data. It is used to store/read/write data from Windows. ● Free area: this part of memory is not used. Figure 9. Internal RAM areas Standard Lib Commun Files Mass Storage Files Standard Lib USB Lib Tools Files Common files Simple Buffer Transfer Mode Double Buffer Transfer Mode Simple buffer transfer mode implementation Double buffer transfer mode implementation USB Mass Storage Application File RAM General purpose memory area Medium memory area Free memory area |
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