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USB4604 数据表(PDF) 38 Page - Microchip Technology |
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USB4604 数据表(HTML) 38 Page - Microchip Technology |
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38 / 62 page ![]() USB 2.0 HSIC Hi-Speed 4-Port Hub Controller Datasheet DS00001716A-page 38 2014 Microchip Technology Inc. 7.1.7 Command Only Program Example To perform a single byte command such as the following: - WRDI - WREN - EWSR - CHIP_ERASE - EBSY - DBSY The device writes the opcode into the first byte of the SPI_CMD_BUF and the SPI_CMD_LEN is set to one. The device first drives SPI_CE_N low, then 8 bits of the command are clocked out on SPI_DO. SPI_DI is not used in this example. Figure 7.5 SPI Command Only Sequence SPI_CE_N SPI_CLK 12 3 4 05 7 6 SPI_DO SPI_DI Command MSB HIGH IMPEDANCE |
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