Silicon Laboratories Si4704 Series Programming Manual page 34

AN332
Property 0x2100. TX_COMPONENT_ENABLE
Individually enables the stereo pilot, left minus right stereo and RDS components. 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 stereo pilot and left minus right stereo components enabled.
Default: 0x0003
Bit D15 D14 D13 D12
Name
0 0 0
Bit Name
15:3 Reserved
2 RDS
1 LMR
0 PILOT
Property 0x2101. TX_AUDIO_DEVIATION
Sets the transmit audio deviation from 0 to 90 kHz in 10 Hz units. The sum of the audio deviation, pilot deviation
and RDS deviation should not exceed regulatory requirements, typically 75 kHz. 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 6825, or 68.25 kHz.
Default: 0x1AA9 (6825)
Units: 10 Hz
Step: 10 Hz
Range: 0–9000
Bit D15 D14 D13
Name
Bit Name
15:0 TXADEV[15:0]
34
D11 D10 D9
0 0 0 0
Always write 0.
RDS Enable (Si4711/13/21 Only).
0 = Disables RDS (default).
1 = Enables RDS to be transmitted.
Left Minus Right.
0 = Disables Left Minus Right.
1 = Enables Left minus Right (Stereo) to be transmitted (default).
Pilot Tone.
0 = Disables Pilot.
1 = Enables the Pilot tone to be transmitted (default).
D12 D11 D10 D9
Transmit Audio Frequency Deviation.
Audio frequency deviation is programmable from 0 Hz to 90 kHz in 10 Hz units.
Default is 6825 (68.25 kHz). Note that the total deviation of the audio, pilot, and
RDS must be less than 75 kHz to meet regulatory requirements.
Confidential Rev. 0.2
D8 D7 D6 D5
0 0 0 0
Function
D8 D7 D6 D5
TXADEV[15:0]
Function
D4 D3 D2 D1
0 0 RDS LMR PILOT
D4 D3 D2 D1
D0
D0