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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADE5166 датащи(PDF) 131 Page - Analog Devices |
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ADE5166 датащи(HTML) 131 Page - Analog Devices |
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131 / 148 page  Preliminary Technical Data ADE5166/ADE5169/ADE5566/ADE5569 Rev. PrB | Page 131 of 148 For example, to get a baud rate of 9600 while operating at a core clock frequency of 4.096 MHz, with the PLL CD bits equal to 0, DIV2 + SBTH2 = log(4,096,000/(16 × 9600))/log2 = 4.74 = 4 Note that the DIV result is rounded down. SBAUDF2 = 64 × (4,096,000/(16 × 23 × 9600) − 1) = 42.67 = 0x2B Therefore, the actual baud rate is 9570 bps, which gives an error of 0.31%. UART ADDITIONAL FEATURES Enhanced Error Checking The extended UART2 provides frame error, break error and overwrite error detection. Framing errors occur when a stop bit is not present at the end of the frame. A missing stop bit implies that the data in the frame may not have been received properly. Break error detection indicates if the Rx line has been low for longer than a 9-bit frame. It indicates that the data just received, a zero, or NULL character, is not valid because the master has disconnected. Overwrite error detection indicates if the received data isn’t read fast enough and as result, a byte of data has been lost. UART2 TxD2 signal modulation There is an internal 38 kHz signal that can be read with the UART2 transmit signal for use in remote control applications. |
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