Si47xx-EVB
Table 15. FM Receiver Settings Property Window Descriptions
Items
AGC Attack Rate
Description
Larger values provide slower attack
Range
4–248
Applicable Devices
Si474x
and smaller values provide faster attack.
AGC Index
If AGC override is set to “ON,” this property
0–26
All
will determine the AGC setting.
AGC Override
If set to “ON,” the AGC property will be used
ON/OFF
All
to set the value of the AGC. If set to “OFF,”
the AGC setting will be automatically
determined by the part.
AGC Release Rate Larger values provide slower
release and smaller values provide faster
release.
4–248
Si474x
De-emphasis
Reference Clock
Frequency (Hz)
Selects de-emphasis of 50 μs or 75 μs.
This field is used to specify the frequency of
the reference clock. The input to the RCLK
50 μs, 75 μs
31130–
34406 Hz
All except Si4749
All
pin divided by the prescaler is the reference
clock. The reference clock must be in the
range of 31130 to 34406 Hz.
Reference Clock
Prescaler
This field is used to specify the prescaler
value. The input to the RCLK pin divided by
1–4095 Hz
All
the prescaler is the reference clock. The
reference clock must be in the range of
31130 to 34406 Hz.
Digital DCLK Falling ON uses falling edge of DCLK for sampling.
Edge
ON, OFF
Si4705/06,
Si4721/31/35/37/39,
Si4730/34/36/38-D60 and
later,
Si4741/43/45,
Si4784/85
Digital Format
Format of digital audio output.
I2S, Left-Justi-
fied, DSP
Si4705/06,
Si4721/31/35/37/39,
Si4730/34/36/38-D60 and
later,
Si4741/43/45,
Si4784/85
Digital Mono Mode ON enables mono in digital audio output.
Enable
Rev. 0.8
ON, OFF
Si4705/06,
Si4721/31/35/37/39,
Si4730/34/36/38-D60 and
later,
Si4741/43/45,
Si4784/85
67
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