si4704 Silicon Laboratories, si4704 Datasheet - Page 26

• Manufacturer Part Number: si4704
• Description: Broadcast Fm Radio Receiver For Consumer Electronics
• Manufacturer: Silicon Laboratories

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