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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST10F296 датащи(PDF) 184 Page - STMicroelectronics |
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ST10F296 датащи(HTML) 184 Page - STMicroelectronics |
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184 / 346 page  Obsolete Product(s) - Obsolete Product(s) Serial channels ST10F296E 184/346 Figure 64. Asynchronous mode of serial channel ASC0 15.1.2 Asynchronous mode baud rates For asynchronous operation, the baud rate generator provides a clock with 16 times the rate of the established baud rate. Every received bit is sampled at the 7th, 8th and 9th cycle of this clock. The baud rate for asynchronous operations of serial channel ASC0 and the required reload value for a given baud rate can be determined by the following formulae: (S0BRL) represents the content of the reload register, taken as an unsigned 13-bit integer. (S0BRS) represents the value of the S0BRS bit (0 or 1), taken as an integer. Using the above equations, the maximum baud rate can be calculated for any given clock speed. Baud rate versus the reload register value (for both S0BRS = 0 and S0BRS = 1) is described in Table 118 and Table 119 for a CPU clock frequency equal to 40 MHz and 64 MHz respectively. 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 TxD0 Transmit buffer register S0TBUF Receive buffer register S0RBUF Sampling MUX 0 1 Pin Input Internal bus RxD0 output B Async f CPU 16 2 S0BRS () + [] S0BRL () 1 + [] × × ⁄ = S0BRL f CPU 16 2 S0BRS () + [] × ⁄ B Async × () 1 – = Obsolete Product(s) - Obsolete Product(s) |
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