AN645 Datasheet, PDF (168/202 Pages) Silicon Laboratories – Si477X PROGRAMMING GUIDE

AN645
Property 0x2004 AM_VALID_RSSI_THRESHOLD
The AM_VALID_RSSI_THRESHOLD property sets the RSSI threshold for a valid AM Seek/Tune. If the desired
channel RSSI is above this threshold, then it is considered valid. The CTS bit (and optional interrupt) is set when it
is safe to send the next command. This property may only be set or read in powerup mode.
Default: 10
Units: dBµV
AM_VALID_RSSI_THRESHOLD
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
0x00
AMVALRSSI[7:0]
0x00
0x0A
Bit
Name
Function
15:8
Reserved
Write 0 for (+) values, 0xFF for (–) values.
Sets the RSSI threshold for a valid AM Seek/Tune. Default is 10 dBµV.
7:0
AMVALRSSI[7:0] Range is –128 to 127 in steps of 1 dB.
–128 = RSSI is not used as a criterion in determining the validity of a station.
Property 0x2200 AM_CHBW_SQ_MIN_MAX
The AM_CHBW_SQ_MIN_MAX property sets the maximum and minimum channel filter bandwidth in units of
100 Hz based on SNR or RSSI. To force a given channel filter bandwidth, set the min and max to the same value.
The CTS bit (and optional interrupt) is set when it is safe to send the next command. This property may only be set
or read in powerup mode.
Default: 0x2314
Units: 100 Hz
AM_CHBW_MIN_MAX
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
MAX[7:0]
MIN[7:0]
0x23
0x14
Bit
Name
Function
15:8
MAX [7:0]
Sets the maximum channel filter bandwidth in units of 100 Hz. Default is
3.5 kHz. Range is 15–50.
7:0
MIN [7:0]
Sets the minimum channel filter bandwidth in units of 100 Hz. Default is
2 kHz. Range is 15–50.
168
Rev. 0.3