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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) 186 Page - STMicroelectronics |
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ST10F296 датащи(HTML) 186 Page - STMicroelectronics |
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186 / 346 page  Obsolete Product(s) - Obsolete Product(s) Serial channels ST10F296E 186/346 15.1.3 ASC0 in synchronous mode In synchronous mode, data are transmitted or received synchronously to a shift clock which is generated by the ST10F296E. Half-duplex communication up to 8 Mbaud (at 40 MHz of fCPU) is possible in this mode. See Figure 65. Figure 65. Synchronous mode of serial channel ASC0 15.1.4 Synchronous mode baud rates For synchronous operation, the baud rate generator provides a clock with four times the rate of the established baud rate. The baud rate for synchronous operation of serial channel ASC0 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 clock speed as given in Table 121 and Table 120 for a CPU clock frequency equal to 40 MHz and 64 MHz respectively. 2 CPU clock S0R Baud rate timer Reload register 4 Clock Serial port control Shift clock S0M = 000B S0OE S0REN 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 MUX 0 1 Pin Internal bus Receive Output Transmit Pin Input/output TDX0 RxD0 B Sync f CPU 4 2 S0BRS () + [] S0BRL () 1 + [] × × ⁄ = S0BRL f CPU 4 2 S0BRS () + [] × ⁄ B Sync × () 1 – = Obsolete Product(s) - Obsolete Product(s) |
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