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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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STLBC01 数据表(PDF) 24 Page - STMicroelectronics |
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STLBC01 数据表(HTML) 24 Page - STMicroelectronics |
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24 / 40 page  Host controller interface (HCI) STLBC01 24/40 DocID022984 Rev 2 Controller to host flow When the controller needs to communicate with the host, the following flow is followed: 1. Controller sets IRQ line to '1'. This means that the controller has at least 1 byte of data to transmit. 2. Host pulls down the MOSI signal. 3. Host activates CSN after 100 ns. 4. Host starts an SPI transaction by sending a data byte equal to 0x00. 5. Host reads data sent by the controller on the MISO line. 6. If IRQ is set to '0' during an SPI transaction, then the controller has no other data to transmit. Once all bits of the transaction are read, the host can stop sending a clock. |
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