SI4704 Datasheet, PDF (26/36 Pages) Silicon Laboratories – Worldwide FM band support (64-108 MHz) integrated antenna support EN55020 compliant

Si4704/05-C40
Prop
0x1100
0x1105
0x1106
0x1200
0x1302
0x1400
0x1401
0x1402
0x1403
0x1404
0x1500
0x1501
0x1502
0x4000
0x4001
Table 14. Selected Si4704/05 Properties
Name
Description
Default
FM_DEEMPHASIS
FM_BLEND_STEREO_
THRESHOLD
FM_BLEND_MONO_
THRESHOLD
FM_RSQ_INT_
SOURCE
Sets deemphasis time constant. Default is 75 us.
0x0002
Sets RSSI threshold for stereo blend (Full stereo above
threshold, blend below threshold). To force stereo set this to 0. 0x0031
To force mono set this to 127. Default value is 49 dBuV.
Sets RSSI threshold for mono blend (Full mono below
threshold, blend above threshold). To force stereo set this to 0. 0x001E
To force mono set this to 127. Default value is 30 dBuV.
Configures interrupt related to Received Signal Quality metrics. 0x0000
FM_SOFT_MUTE_
MAX_ATTENUATION
FM_SEEK_BAND_
BOTTOM
FM_SEEK_BAND_TOP
FM_SEEK_FREQ_
SPACING
FM_SEEK_TUNE_
SNR_THRESHOLD
FM_SEEK_TUNE_
RSSI_TRESHOLD
RDS_INT_SOURCE
RDS_INT_FIFO_COUNT
RDS_CONFIG
RX_VOLUME
Sets maximum attenuation during soft mute (dB). Set to 0 to
disable soft mute. Default is 16 dB.
0x0010
Sets the bottom of the FM band for seek. Default is 8750.
0x222E
Sets the top of the FM band for seek. Default is 10790.
0x2A26
Selects frequency spacing for FM seek.
0x000A
Sets the SNR threshold for a valid FM Seek/Tune. Default value
is 3 dB.
0x0003
Sets the RSSI threshold for a valid FM Seek/Tune. Default
value is 20 dBuV.
0x0014
Configures RDS interrupt behavior.
0x0000
Sets the minimum number of RDS groups stored in the receive
RDS FIFO required before RDS RECV is set.
0x0000
Configures RDS setting.
0x0000
Sets the output volume.
0x003F
RX_HARD_MUTE
Mutes the audio output. L and R audio outputs may be muted
independently in FM mode.
0x0000
26
Rev. 1.0