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LLCC68 Datasheet(PDF) 48 Page - Semtech Corporation |
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LLCC68 Datasheet(HTML) 48 Page - Semtech Corporation |
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48 / 106 page  LLCC68 Data Sheet Rev. 1.0 DS.LLCC68.W.APP July 2019 48 of 106 Semtech www.semtech.com In addition to this, the BUSY will also go high to handle its internal IRQ. In this scenario, it is essential to wait for the BUSY line to go low before sending an SPI command (either a “read” or “write” command). Figure 8-4: Switching Time Definition in Active Mode The following table gives the value of TSWMode for all possible transitions. The switching time is defined as the time between the rising edge of the NSS ending the SPI transaction and the falling edge of BUSY. Table 8-2: Switching Time Transition TSWMode Typical Value [s] SLEEP to STBY_RC cold start (no data retention) 3500 SLEEP to STBY_RC warm start (with data retention) 340 STBY_RC to STBY_XOSC 31 STBY_RC to FS 50 STBY_RC to RX 83 STBY_RC to TX 126 STBY_XOSC to FS 40 STBY_XOSC to TX 105 STBY_XOSC to RX 62 FS to RX 41 FS to TX 76 RX to FS 15 RX to TX 92 BUSY NSS SPI (MOSI, MISO, SCK) opcode Param1 Param… Mode |
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