14.4.8.2 RF Channel Selection
The PLL is designed to support:
- One channel in the European SRD band from 863MHz to 870MHz at 868.3MHz according to IEEE 802.15.4 (channel k = 0)
- 10 channels in the North American ISM band from 902MHz to 928MHz with a channel
spacing of 2MHz according to IEEE 802.15.4. The center frequency of these channels
is defined as:
FC[MHz] = 906[MHz] + 2[MHz] x (k – 1), for k = 1, 2, ..., 10
where k is the channel number.
- Four channels in the Chinese WPAN band from 779MHz to 787MHz with a channel spacing of 2MHz according to IEEE 802.15.4c-2009 and IEEE 802.15.4‑2011. Center frequencies are 780MHz, 782MHz, 784MHz, and 786MHz.
Additionally, the PLL supports all frequencies from 769MHz to 935MHz with 1MHz frequency spacing and four bands with 100kHz spacing from 769.0MHz to 794.5MHz, 857.0MHz to 882.5MHz, and 902.0MHz to 928.5MHz. The frequency is selected by the CC_BAND bits in the CC_CTRL_1 register (CC_CTRL_1.CC_BAND) and CC_NUMBER bits in the CC_CTRL_0 register (CC_CTRL_0.CC_CTRL_0).
The table below shows the settings of CC_BAND and CC_NUMBER.
| CC_BAND | CC_NUMBER | Description |
|---|---|---|
| 0 | Not used | European and North American channels according to IEEE 802.15.4; Frequency selected by the CHANNEL bits in the PHY_CC_CCA register (PHY_CC_CCA.CHANNEL) |
| 1 | 0x00 – 0xFF |
769.0MHz – 794.5MHz Fc [MHz] = 769.0[MHz] + 0.1[MHz] x CC_NUMBER |
| 2 | 0x00 – 0xFF |
857.0MHz – 882.5MHz Fc [MHz] = 857.0[MHz] + 0.1[MHz] x CC_NUMBER |
| 3 | 0x00 – 0xFF |
903.0MHz – 928.5MHz Fc [MHz] = 903.0[MHz] + 0.1[MHz] x CC_NUMBER |
| 4 | 0x00 – 0x5E |
769MHz – 863MHz Fc [MHz] = 769[MHz] + 1[MHz] x CC_NUMBER |
| 5 | 0x00 – 0x66 |
833MHz – 935MHz Fc [MHz] = 833[MHz] + 1[MHz] x CC_NUMBER |
| 6 | 0x00 – 0xFF |
902.0MHz – 927.5MHz Fc [MHz] = 902.0[MHz] + 0.1[MHz] x CC_NUMBER |
| 7 | 0x00 – 0xFF | Reserved |