Silicon Laboratories SI4734-B20, Product Manual

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S i 4 7 3 4 / 3 5 - B 2 0
Rev. 1.0 29
0x1502 RDS_CONFIG Configures RDS setting. 0x0000
0x3100 AM_DEEMPHASIS
Sets de-emphasis time constant. Can be set to 50 us. De-
emphasis is disabled by default.
0x0000
0x3102 AM_CHANNEL_FILTER
Selects the bandwidth of the channel filter for AM/SW/LW recep-
tion. The choices are 6, 4, 3, 2, or 1 (kHz). The default band-
width is 2 kHz.
0x0003
0x3200 AM_RSQ_INTERRUPTS
Configures interrupt related to RSQ metrics. All interrupts are
disabled by default.
0x0000
0x3201
AM_RSQ_SNR_HIGH_
THRESHOLD
Sets high threshold for SNR interrupt. The default is 0 dB. 0x007F
0x3202
AM_RSQ_SNR_LOW_
THRESHOLD
Sets low threshold for SNR interrupt. The default is 0 dB. 0x0000
0x3203
AM_RSQ_RSSI_HIGH_
THRESHOLD
Sets high threshold for RSSI interrupt. The default is 0 dB. 0x007F
0x3204
AM_RSQ_RSSI_LOW_
THRESHOLD
Sets low threshold for RSSI interrupt. The default is 0 dB. 0x0000
0x3300 AM_SOFT_MUTE_RATE
Sets the rate of attack when entering or leaving soft mute. The
default is 278 dB/s.
0x0040
0x3301 AM_SOFT_MUTE_SLOPE
Sets the AM/SW/LW soft mute slope. The bigger the number,
the higher the max attenuation level. Default value is a slope of
2.
0x0002
0x3302
AM_SOFT_MUTE_MAX_
ATTENUATION
Sets maximum attenuation during soft mute (dB). Set to 0 to dis-
able soft mute. Default is 16 dB.
0x0010
0x3303
AM_SOFT_MUTE_SNR_
THRESHOLD
Sets SNR threshold to engage soft mute. Default is 10 dB. 0x000A
0x3400
AM_SEEK_BAND_
BOTTOM
Sets the bottom of the AM/SW/LW band for seek. Default is 520. 0x0208
0x3401 AM_SEEK_BAND_TOP Sets the top of the AM/SW/LW band for seek. Default is 1720. 0x06AE
0x3402
AM_SEEK_FREQ_
SPACING
Selects frequency spacing for AM/SW/LW seek. Default is 10
kHz spacing.
0x000A
0x3403
AM_SEEK_SNR_
THRESHOLD
Sets the SNR threshold for a valid AM/SW/LW Seek/Tune. If the
value is zero then SNR threshold is not considered when doing
a seek. Default value is 5 dB.
0x0005
0x3404
AM_SEEK_RSSI_
THRESHOLD
Sets the RSSI threshold for a valid AM/SW/LW Seek/Tune. If
the value is zero then RSSI threshold is not considered when
doing a seek. Default value is 25 dBuV.
0x0019
0x4000 RX_VOLUME Sets the output volume. 0x003F
0x4001 RX_HARD_MUTE
Mutes the audio output. L and R audio outputs may be muted
independently in FM mode.
0x0000
Table 15. Si473x Property Summary (Continued)
Prop Name Description Default