AN332 Datasheet, PDF (37/302 Pages) Silicon Laboratories – Si47XX PROGRAMMING GUIDE

AN332
Property 0x2102. TX_PILOT_DEVIATION
Sets the transmit pilot 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 675, or 6.75 kHz.
Available in: All
Default: 0x02A3 (675)
Units: 10 Hz
Step: 10 Hz
Range: 0–9000
Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name
TXPDEV[15:0]
Bit
Name
Function
Transmit Pilot Frequency Deviation.
15:0
TXPDEV[15:0]
Pilot tone frequency deviation is programmable from 0 Hz to 90 kHz in 10 Hz units.
Default is 675 (6.75 kHz). Note that the total deviation of the audio, pilot, and RDS
must be less than 75 kHz to meet regulatory requirements.
Property 0x2103. TX_RDS_DEVIATION
Sets the RDS deviation from 0 to 7.5 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 200, or 2 kHz.
Available in: Si4711/13/21
Default: 0x00C8 (200)
Units: 10 Hz
Step: 10 Hz
Range: 0–9000
Bit D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Name
TXRDEV[15:0]
Bit
Name
Function
Transmit RDS Frequency Deviation.
15:0
TXRDEV[15:0]
RDS frequency deviation is programmable from 0 Hz to 90 kHz in 10 Hz units.
Default is 200 (2 kHz). Note that the total deviation of the audio, pilot, and RDS
must be less than 75 kHz to meet regulatory requirements.
Rev. 1.0
37