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RF68 Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers |
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9 / 21 page Page 9 Tel: + 86-755-82973805 Fax: + 86-755-82973550 E-mail: sales@hoperf.com http:/ / www.hoperf.com RF68 4.2. Mode Selection Flowchart Circuit Start-up Wait T_Start Logic ‘0’ Check CTRL Pin Logic ‘1’ Power & Go 1 868.3 MHz FSK, Fdev=+/-19.2kHz +10dBm Power & Go 2 433.92 MHz OOK +10dBm CTRL Clock signal Advanced Mode Full register flexibility Automatic or forced Transmit Figure 4. RF68 Mode Selection Note Advanced mode is entered only if DATA is held low during CTRL’s rising edge. When powering up the circuit (microcontroller and RF68), the logic level of the CTRL pin is sampled after T_START, as described on Figure 5. During T_START, the microcontroller IO driving the CTRL pin must be configured as an output, driving the CTRL pin to the desired state. Figure 5. Power-up Timing |
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