Si4703-B17
26 Confidential Rev. 1.0
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Reset value = 0x0000
Register 06h. System Configuration 3
Bit D15 D14 D13 D12D11D10 D9 D8 D7D6D5D4D3D2D1D0
Name SMUTER[1:0] SMUTEA[1:0] 0 0 RDSPRF VOLEXT SKSNR[3:0] SKCNT[3:0]
Type R/W R/W R/W R/W R/W R/W R/W R/W
Bit Name Function
15:14 SMUTER[1:0] Softmute Attack/Recover Rate.
00 = fastest (default).
01 = fast.
10 = slow.
11 = slowest.
13:12 SMUTEA[1:0] Softmute Attenuation.
00 = 16 dB (default).
01 = 14 dB.
10 = 12 dB.
11 = 10 dB.
11:10 Reserved Reserved.
Always write to zero.
9 RDSPRF RDS High-Performance Mode.
0 = disabled (default).
1 = enabled.
Refer to 4.4. "RDS/RBDS Processor and Functionality" on page 14.
Refer to "AN281: Si4700/01/02/03 Firmware Change List."
8 VOLEXT Extended Volume Range.
0 = disabled (default).
1 = enabled.
This bit attenuates the output by 30 dB. With the bit set to 0, the 15 volume settings
adjust the volume between 0 and –28 dBFS. With the bit set to 1, the 15 volume set-
tings adjust the volume between –30 and –58 dBFS.
Refer to 4.5. "Stereo Audio Processing" on page 14.
Refer to "AN281: Si4700/01/02/03 Firmware Change List."
7:4 SKSNR[3:0] Seek SNR Threshold.
0000 = disabled (default).
0001 = min (most stops).
1111 = max (fewest stops).
Required channel SNR for a valid seek channel.
3:0 SKCNT[3:0] Seek FM Impulse Detection Threshold.
0000 = disabled (default).
0001 = max (most stops).
1111 = min (fewest stops).
Allowable number of FM impulses for a valid seek channel.
