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数据搜索系统，热门电子元器件搜索 |
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USB4604 数据表(PDF) 35 Page - SMSC Corporation |
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USB4604 数据表(HTML) 35 Page - SMSC Corporation |
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35 / 71 page  USB 2.0 HSIC Hi-Speed 4-Port Hub Controller Datasheet SMSC USB4604 35 Revision 1.0 (06-17-13) DATASHEET Automatic reads and writes happen when there is an external XDATA read or write, using the serial stream that has been previously discussed. 7.1.5 Erase Example To perform a SCTR_ERASE, 32BLK_ERASE, or 64BLK_ERASE, the device writes 0x20, 0x52, or 0xD8, respectively to the first byte of the command buffer, followed by a 3-byte address. The length of the transfer is set to 4 bytes. To perform this, the device drives SPI_CE_N low, then counts out 8 clocks. It then outputs on SPI_DO the 8 bits of command, followed by 24 bits of address of the location to be erased. When the transfer is complete, SPI_CE_N goes high, while the SPI_DI line is ignored in this example. Figure 7.3 SPI Erase Sequence SPI_CE_N SPI_CLK 16 23 24 31 15 12 3 4 05 7 6 ADD. SPI_DO SPI_DI 8 Command MSB MSB ADD. ADD. HIGH IMPEDANCE |
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