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ST10F280 数据表(PDF) 112 Page - STMicroelectronics |
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ST10F280 数据表(HTML) 112 Page - STMicroelectronics |
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112 / 186 page  ST10F280 112/186 14 - SERIAL CHANNELS Serial communication with other microcontrollers, microprocessors, terminals or external peripheral components is provided by two serial interfaces: the asynchronous / synchronous serial channel (ASCO) and the high-speed synchronous serial channel (SSC). Two dedicated Baud rate generators set up all standard Baud rates without the requirement of oscillator tuning. For transmission, reception and erroneous reception, 3 separate interrupt vectors are provided for each serial channel. 14.1 - Asynchronous / Synchronous Serial Interface (ASCO) The asynchronous / synchronous serial interface (ASCO) provides serial communication between the ST10F280 and other microcontrollers, microprocessors or external peripherals. A set of registers is used to configure and to control the ASCO serial interface: – P3, DP3, ODP3 for pin configuration – SOBG for Baud rate generator – SOTBUF for transmit buffer – SOTIC for transmit interrupt control – SOTBIC for transmit buffer interrupt control – SOCON for control – SORBUF for receive buffer (read only) – SORIC for receive interrupt control – SOEIC for error interrupt control 14.1.1 - ASCO in Asynchronous Mode In asynchronous mode, 8 or 9-bit data transfer, parity generation and the number of stop bit can be selected. Parity framing and overrun error detection is provided to increase the reliability of data transfers. Transmission and reception of data is double-buffered. Full-duplex communication up to 1.25M Bauds (at 40MHz of fCPU) is supported in this mode. Figure 56 : Asynchronous Mode of Serial Channel ASC0 Pin 2 CPU Clock S0R Baud Rate Timer Reload Register 16 Clock Serial Port Control Shift Clock S0M S0STP S0FE S0OE S0PE S0REN S0FEN S0PEN S0OEN S0LB S0RIR S0TIR S0EIR Receive Interrupt Request Transmit Interrupt Request Error Interrupt Request Transmit Shift Register Receive Shift Register Transmit Buffer Register S0TBUF Receive Buffer Register S0RBUF Sampling MUX 0 1 Pin Input Internal Bus RxD0/P3.11 Output TxD0 / P3.10 |
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