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CC115LRGPR Datasheet(PDF) 31 Page - Texas Instruments |
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CC115LRGPR Datasheet(HTML) 31 Page - Texas Instruments |
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31 / 74 page ![]() CC115L www.ti.com SWRS105B – MAY 2011 – REVISED JUNE 2014 Table 5-5. Overall State Transition Times [Example for 26-MHz Crystal Oscillator, 250 kBaud Data Rate, and TEST0 = 0x0B (Maximum Calibration Time)]. Description Transition Time (FREND0.PA_POWER=0) Transition Time [µs] IDLE to TX/FSTXON, no calibration 1954/fxosc 75.2 IDLE to TX/FSTXON, with calibration 1953/fxosc + FS calibration Time 799 TX to IDLE, no calibration ~0.25/fbaudrate ~1 TX to IDLE, with calibration ~0.25/fbaudrate + FS calibration Time 725 Manual calibration 283/fxosc + FS calibration Time 735 5.10.5.2 Frequency Synthesizer Calibration Time Table 5-6 summarizes the frequency synthesizer (FS) calibration times for possible settings of TEST0 and FSCAL3.CHP_CURR_CAL_EN. Setting FSCAL3.CHP_CURR_CAL_EN to 00b disables the charge pump calibration stage. TEST0 is set to the values recommended by SmartRF Studio software SWRC176. The possible values for TEST0 when operating with different frequency bands are 0x09 and 0x0B. SmartRF Studio software always sets FSCAL3.CHP_CURR_CAL_EN to 10b. The calibration time can be reduced from 712/724 µs to 145/157 µs. See Section 5.18.2 for more details. Table 5-6. Frequency Synthesizer Calibration Times (26- and 27-MHz Crystal) TEST0 FSCAL3.CHP_CURR_CAL_EN FS Calibration Time fxosc = 26 FS Calibration Time fxosc = 27 MHz MHz 0x09 00b 3764/fxosc = 145 µs 3764/fxosc = 139 µs 0x09 10b 18506/fxosc = 712 µs 18506/fxosc = 685 µs 0x0B 00b 4073/fxosc = 157 µs 4073/fxosc = 151 µs 0x0B 10b 18815/fxosc = 724 µs 18815/fxosc = 697 µs Copyright © 2011–2014, Texas Instruments Incorporated Detailed Description 31 Submit Documentation Feedback Product Folder Links: CC115L |
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