Silicon Laboratories Si4704 Series Programming Manual page 129

Property 0x3303. AM_SOFT_MUTE_SNR_THRESHOLD
Sets the SNR threshold to engage soft mute. Whenever the SNR for a tuned frequency drops below this threshold
the AM reception will go in soft mute, provided soft mute max attenuation property is non-zero. 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 when in
powerup mode. The default SNR threshold is 10 dB.
Default: 0x000A
Units: dB
Step: 1
Range: 0–63
Bit D15 D14 D13
Name 0 0
Bit Name
15:6 Reserved
5:0 SMTHR
D12 D11 D10
0 0 0 0
Always write to 0.
AM Soft Mute SNR Threshold.
The SNR threshold for a tuned frequency below which soft mute is engaged provided
the value written to the AM_SOFT_MUTE_MAX_ATTENUATION property is not zero.
Default SNR threshold is 10 dB.
Confidential Rev. 0.2
D9 D8 D7 D6
0 0 0 0
Function
AN332
D5 D4 D3 D2
SMTHR[5:0]
D1 D0
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