SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
Command ID number: 0x0013
CMD_MODIFY_FS is an immediate command that takes the parameters listed in Table 26-51.
| Byte Index | Field Name | Bits | Bit Field Name | Type | Description |
|---|---|---|---|---|---|
| 0–1 | commandNo | W | The command ID number | ||
| 2–3 | frequency | W | The frequency in MHz to which to tune | ||
| 4–5 | fractFreq | W | Fractional part of the frequency to which to tune |
On reception, the radio CPU will program a new frequency in the synthesizer without restarting calibration. This has to be a small change compared to the frequency used under calibration, otherwise the synthesizer will most likely be unable to relock. Extra distortion may occur if the command is done during RX or TX.
The frequency to use is given by frequency and fractFreq, and the frequency will be as close as possible to (frequency + fractFreq / 65536) MHz.
If the synthesizer is not running and the calibration is done, the radio CPU will return ContextError in CMDSTA. If frequency is invalid, the radio CPU will return ParError in CMDSTA. Otherwise, the radio CPU will return DONE in CMDSTA when the update is complete.