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RF96 Datasheet(PDF) 50 Page - HOPE Microelectronics CO., Ltd. |
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RF96 Datasheet(HTML) 50 Page - HOPE Microelectronics CO., Ltd. |
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50 / 121 page  Page 50 RF96/97/98 Tel: +86-755-82973805 Fax: +86-755-82973550 E-mail: sales@hoperf.com http://www.hoperf.com WIRELESS & SENSING PRELIMINARY DATASHEET 4.2.4. Operating Modes in FSK/OOK Mode The RF96/97/98 has several working modes, manually programmed in RegOpMode. Fully automated mode selection, packet transmission and reception is also possible using the Top Level Sequencer described in Section 4.2.8. Table 67 Basic Transceiver Modes Mode Selected mode Symbol Enabled blocks 000 Sleep mode Sleep None 001 Standby mode Stdby Top regulator and crystal oscillator 010 Frequency synthesiser to Tx frequency FSTx Frequency synthesizer at Tx frequency (Frf) 011 Transmit mode Tx Frequency synthesizer and transmitter 100 Frequency synthesiser to Rx frequency FSRx Frequency synthesizer at frequency for reception (Frf-IF) 101 Receive mode Rx Frequency synthesizer and receiver When switching from a mode to another the sub-blocks are woken up according to a pre-defined optimized sequence. 4.2.5. Startup Times The startup time of the transmitter or the receiver is dependant upon which mode the transceiver was in at the beginning. For a complete description, Figure 17 below shows a complete startup process, from the lower power mode “Sleep”. Current Drain IDDR (Rx) or IDDT (Tx) IDDFS IDDSL IDDST Timeline 0 TS_OSC TS_OSC +TS_FS TS_OSC +TS_FS +TS_TR TS_OSC +TS_FS +TS_RE FSTx Transmit Sleep mode Stdby mode FSRx Receive Figure 17. Startup Process TS_OSC is the startup time of the crystal oscillator which depends on the electrical characteristics of the crystal. TS_FS is the startup time of the PLL including systematic calibration of the VCO. Typical values of TS_OSC and TS_FS are given in Section 2.3. |
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