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Si47xx-EVB
The EVB supports three different kinds of configurations for the FM transmitter:
?? Analog
?? Analog
In to Analog In
In to Digital In
?? Digital In to Digital In
Analog In to Analog In: This configuration provides a way for the user to evaluate the analog audio input for FM
transmission.
The input to the EVB is an analog audio provided via the RCA input connector J7 or LINE In connector J19 (white).
Jumpers J5 and J13 are set to RCA input by default. The user has to change this jumper accordingly if LINE In is
being used. Then the analog audio input is routed directly through a switch to the Si47xx Rin/Lin inputs pin 15 and
16 (Audio2).
Analog In to Digital In: This configuration provides a way for the user to evaluate the Si47xx digital audio input for
FM transmission using an analog audio input.
The input to the EVB is an analog audio provided via the RCA input connector J7 or LINE In connector J19 (white).
Jumpers J5 and J13 are set to RCA input by default. The user has to change this jumper accordingly if LINE In is
being used. Then the analog audio input is converted by CODEC U10 to a serial audio digital data before it is
routed to the Si47xx digital audio input DIO and DFS pin 13 and 14 (Audio1). The DCLK input is routed to the
GPO3/DCLK pin 17. Make sure that jumper J41 is set to DCLK to ensure proper operation.
Digital In to Digital In: This configuration provides a way for the user to evaluate the Si47xx digital audio input for
FM transmission using S/PDIF digital audio commonly found in sound cards.
The input to the EVB is a digital S/PDIF data provided via the S/PDIF In connector J19 (white). The digital S/PDIF
input is converted by S/PDIF Translator U9 to a serial audio digital data before it is routed to the Si47xx digital
audio input DIO and DFS pin 13 and 14 (Audio1). The DCLK input is routed to the GPO3/DCLK pin 17. Make sure
that jumper J41 is set to DCLK to ensure proper operation.
Note: Digital in through J19 will not be supported on new EVBs as of February 14, 2011.
The EVB supports three different kinds of configurations for the FM receiver:
?? Analog
Out to Analog Out
?? Digital Out to Digital and Analog Out
?? Dual Output (Digital and Analog Out)
Analog Out to Analog Out: This configuration provides a way for the user to evaluate the analog audio output for
receiver operation. The output of the Si47xx is routed to RCA output connector J6 and Line output connector J30.
Digital Out to Digital and Analog Out: This configuration provides a way for the user to evaluate the digital audio
output for FM and AM receive using either S/PDIF digital audio or analog audio through the onboard CODEC. The
Si47xx digital audio out is routed through the S/PDIF translator μ9 to S/PDIF output connector J30 and routed
through the CODEC to RCA output connector J6 and line output connector J30.
Note: Digital output through J30 will not be supported on new EVBs as of February 14, 2011.
Dual Output (Digital and Analog Out): This configuration provides a way for the user to evaluate the analog
audio out and digital audio using S/PDIF digital audio for FM and AM. The analog output of the Si47xx is routed to
RCA output connector J6 and line output connector J30 and the digital audio out is routed through the S/PDIF
translator to S/PDIF output connector J30.
Note: Digital output through J30 will not be supported on new EVBs as of February 14, 2011.
Rev. 0.8
13
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