SI4712-B30 Datasheet, PDF (31/42 Pages) Silicon Laboratories – FM RADIO TRANSMITTER WITH RECEIVE POWER SCAN

Si4712/13-B30
Table 18. Si471x Property Summary
Prop
Name
Description
Default
0x0001
GPO_IEN
Enables interrupt sources.
0x0000
0x0101 DIGITAL_INPUT _FORMAT Configures the digital input format.
0x0000
0x0103
DIGITAL_INPUT _SAMPLE_RATE
Configures the digital input sample rate in 10 Hz steps.
Default is 0.
0x0000
0x0201
REFCLK_FREQ
Sets frequency of the reference clock in Hz. The range is
31130 to 34406 Hz, or 0 to disable the AFC. Default is 0x8000
32768 Hz.
0x0202
REFCLK_PRESCALE
Sets the prescaler value for the reference clock.
0x0001
0x2100
TX_COMPONENT_ENABLE
Enable transmit multiplex signal components.
Default has pilot and L-R enabled.
0x0003
0x2101
TX_AUDIO_DEVIATION
Configures audio frequency deviation level. Units are in
10 Hz increments. Default is 6285 (68.25 kHz).
0x1AA9
0x2102
TX_PILOT_DEVIATION
Configures pilot tone frequency deviation level. Units are
in 10 Hz increments. Default is 675 (6.75 kHz)
0x02A3
0x2103
TX_RDS_DEVIATION
Si4713 Only. Configures the RDS/RBDS frequency
deviation level. Units are in 10 Hz increments. Default is 0x00C8
2 kHz.
0x2104
0x2105
TX_LINE_INPUT_LEVEL
TX_LINE_INPUT_MUTE
Configures maximum analog line input level to the
LIN/RIN pins to reach the maximum deviation level pro-
grammed into the audio deviation property TX Audio
Deviation. Default is 636 mV_PK.
Sets line input mute. L and R inputs may be inde-
pendently muted. Default is not muted.
0x327C
0x0000
0x2106
TX_PREEMPHASIS
Configures pre-emphasis time constant.
Default is 0 (75 µS).
0x0000
0x2107
TX_PILOT_FREQUENCY
Configures the frequency of the stereo pilot. Default is
19000 Hz.
0x4A38
0x2200
TX_ACOMP_ENABLE
Enables audio dynamic range control.
Default is 0 (disabled).
0x0002
0x2201
TX_ACOMP_THRESHOLD
Sets the threshold level for audio dynamic range control.
Default is –40 dB.
0xFFD8
0x2202
TX_ACOMP_ATTACK_TIME
Sets the attack time for audio dynamic range control.
Default is 0 (0.5 ms).
0x0000
Sets the release time for audio dynamic range control.
0x2203 TX_ACOMP_RELEASE_TIME
0x0004
Default is 4 (1000 ms).
0x2204
TX_ACOMP_GAIN
Sets the gain for audio dynamic range control.
Default is 15 dB.
0x000F
0x2205 TX_LIMITER_RELEASE_TIME Sets the limiter release time. Default is 102 (5.01 ms) 0x0066
0x2300
TX_ASQ_INTERRUPT_SOURCE
Configures measurements related to signal quality met-
rics. Default is none selected.
0x0000
0x2301
TX_ASQ_LEVEL_LOW
Configures low audio input level detection threshold.
This threshold can be used to detect silence on the
incoming audio.
0x0000
Rev. 1.1
31