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SN250QT データシート(PDF) 68 Page - STMicroelectronics |
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SN250QT データシート(HTML) 68 Page - STMicroelectronics |
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68 / 130 page  Functional description—application modules SN250 68/130 7.3 Serial controller SC2 The SN250 SC2 module provides synchronous (SPI or I2C) serial communications. Figure 8 is a block diagram of the SC2 module. Figure 8. SC2 block diagram The full-duplex interface of the SC2 module can be configured into one of these two communication modes, but it cannot run them simultaneously. To reduce the interrupt service requirements of the CPU, the SC2 module contains buffered data management schemes. A dedicated, buffered DMA controller is available to the SPI while a FIFO is available to both modes. In addition, a SC2 data register allows the software application direct access to the SC2 data. Finally, the SC2 routes the interface signals to GPIO pins. These are shared with other functions and are controlled by the GPIO_CFG register. For selecting alternate pin-functions, please refer to Table 17 and Table 18. |
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