Silicon Laboratories Si4704 Series Programming Manual page 37

Property 0x2105. TX_LINE_INPUT_MUTE
Selectively mutes the left and right audio inputs. 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.
Default: 0x0000
Bit D15 D14 D13 D12 D11 D10
Name
0 0 0
Bit Name
15:2 Reserved
1 LIMUTE
0 RIMUTE
Property 0x2106. TX_PREEMPHASIS
Sets the transmit pre-emphasis to 50 µs, 75 µs or off. 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 is 75 µs.
Default: 0x0000
Bit D15 D14 D13
Name
0 0 0
Bit Name
15:2 Reserved
1:0 FMPE[1:0]
D9
0 0 0 0
Always write to 0.
Mutes L Line Input.
0 = No mute (default)
1 = Mute
Mutes R Line Input.
0 = No mute (default)
1 = Mute
D12 D11 D10 D9
0 0 0
Always write to 0.
FM Pre-Emphasis.
00 = 75 µs. Used in USA (default)
01 = 50 µs. Used in Europe, Australia, Japan
10 = Disabled
11 = Reserved
Confidential Rev. 0.2
D8 D7 D6 D5
0 0 0 0
Function
D8 D7 D6
0 0 0 0
Function
AN332
D4 D3 D2 D1
0 0 0 LIMUTE RIMUTE
D5 D4 D3 D2
0 0 0 0
D0
D1 D0
FMPE[1:0]
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