4.4.3.1.1.1 CHDN – Channel Filter Down-Sampling Register

This register must only be modified if the channel filter is disabled (RDPR.PRFLT = 1). Modifying the settings during operation may lead to unstable operation.
Name: CHDN
Offset: 0x0AA
Reset: 0x00

Bit 76543210 
 0ADCDNBBDN[4:0] 
Access R/WR/WR/WR/WR/WR/WR/WR/W 
Reset 00000000 

Bit 7 –  Reserved Bit

Reserved for future use, read as ‘0’.

Bit 6 – 0

Reserved. Has to be ‘0’ during operation. Otherwise, the RSSI value is corrupted.

Bit 5 – ADCDN ADC down-sampling configuration

Table 4-10. ADCDN Configuration
ADCDNDescription
0Use for RF bands: 418 MHz to 440 MHz and 836 MHz to 870 MHz
1Use for RF bands: 310 MHz to 318 MHz, 441 MHz to 477 MHz and 871 MHz to 956 MHz

Bits 4:0 – BBDN[4:0] Baseband Filter Down-Sampling Ratio

For more details about the required setting for each supported bandwidth, see Filter Settings for Each Supported Bandwidth in the Channel Filter from Related Links. The valid settings for BBDN are 2-20. All other values are forbidden and might result in flawed circuit behavior.