Table 15. Si473x Property Summary
Prop | Name | Description | Default | |
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0x0001 | GPO_IEN | Enables interrupt sources. | 0x0000 | |
0x0102 | DIGITAL_OUTPUT_FORMAT | Configures the digital output format (Si4735 only). | 0x0000 | |
0x0104 | DIGITAL_OUTPUT_ | Configures the digital output sample rate in 100 Hz steps. The | 0x0000 | |
SAMPLE_RATE | digital output sample rate is disabled by default (Si4735 only). | |||
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0x0201 | REFCLK_FREQ | Sets frequency of reference clock in Hz. The range is 31130 to | 0x8000 | |
34406 Hz, or 0 to disable the AFC. Default is 32768 Hz. | ||||
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0x0202 | REFCLK_PRESCALE | Sets the prescaler value for RCLK input. | 0x0001 | |
0x1100 | FM_DEEMPHASIS | Sets | 0x0002 | |
0x1105 | FM_BLEND_STEREO_ | Sets RSSI threshold for stereo blend (full stereo above thresh- |
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old, blend below threshold). To force stereo set this to 0. To | 0x0031 | |||
THRESHOLD | ||||
| force mono set this to 127. Default value is 49 dBuV. |
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0x1106 | FM_BLEND_MONO_ | Sets RSSI threshold for mono blend (full mono below threshold, |
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blend above threshold). To force stereo set this to 0. To force | 0x001E | |||
THRESHOLD | ||||
| mono set this to 127. Default value is 30 dBuV. |
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0x1108 | FM_MAX_TUNE_ | Sets the maximum freq error allowed before setting the AFC rail | 0x001E | |
| ERROR | (AFCRL) indicator. Default value is 30 kHz. |
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0x1200 | FM_RSQ_INT_ | Configures interrupt related to RSQ metrics. | 0x0000 | |
SOURCE | ||||
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0x1201 | FM_RSQ_SNR_HI_ | Sets high threshold for SNR interrupt. | 0x007F | |
THRESHOLD | ||||
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0x1202 | FM_RSQ_SNR_LO_ | Sets low threshold for SNR interrupt. | 0x0000 | |
THRESHOLD | ||||
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0x1203 | FM_RSQ_RSSI_HI_ | Sets high threshold for RSSI interrupt. | 0x007F | |
THRESHOLD | ||||
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0x1204 | FM_RSQ_RSSI_LO_ | Sets low threshold for RSSI interrupt. | 0x0000 | |
THRESHOLD | ||||
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0x1207 | FM_RSQ_BLEND_ | Sets the blend threshold for blend interrupt when boundary is | 0x0081 | |
THRESHOLD | crossed. | |||
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0x1302 | FM_SOFT_MUTE_ | Sets maximum attenuation during soft mute (dB). Set to 0 to dis- | 0x0010 | |
| MAX_ATTENUATION | able soft mute. Default is 16 dB. |
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0x1303 | FM_SOFT_MUTE_ | Sets SNR threshold to engage soft mute. Default is 4 dB. | 0x0004 | |
SNR_THRESHOLD | ||||
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0x1400 | FM_SEEK_BAND_ | Sets the bottom of the FM band for seek. Default is 8750. | 0x222E | |
BOTTOM | ||||
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0x1401 | FM_SEEK_BAND_TOP | Sets the top of the FM band for seek. Default is 10790. | 0x2A26 | |
0x1402 | FM_SEEK_FREQ_ | Selects frequency spacing for FM seek. | 0x000A | |
SPACING | ||||
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0x1403 | FM_SEEK_TUNE_ | Sets the SNR threshold for a valid FM Seek/Tune. Default value | 0x0003 | |
| SNR_THRESHOLD | is 3 dB. |
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0x1404 | FM_SEEK_TUNE_ | Sets the RSSI threshold for a valid FM Seek/Tune. Default | 0x0014 | |
RSSI_TRESHOLD | value is 20 dBuV. | |||
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0x1500 | RDS_INT_SOURCE | Configures RDS interrupt behavior. | 0x0000 | |
0x1501 | RDS_INT_FIFO_COUNT | Sets the minimum number of RDS groups stored in the receive | 0x0000 | |
RDS FIFO required before RDS RECV is set. | ||||
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28 | Rev. 1.0 |
