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Si477x-EVB
4.2. Initialization
The Silicon Labs GUI will commutate with the evaluation board(s) and tuner(s) to identify which are in use. The
applicable part numbers will be displayed under “device info” during initialization and on the front panel while the
radio is in operation. Only the available application modes and tuners will be displayed by the GUI when initializing
the tuner. Note that this user ’s guide may show figures with application modes and features that may not be
available depending upon the tuner part number or daughter card in use.
Figure 7. Initialization Window
1. Start the software by either using the desktop shortcut or from:
Start ? Programs ? Silicon Laboratories, Inc ? Silicon Labs Audio GUI
2. Configure initialization options as shown in Figure 7. “Initialization Window”. A number of powerup options
are available:
a. EVB Application: Select one of the following EVB application modes:
?? Single
tuner
?? RDS/VICS
b. Initial Boot Mode: Selects whether the receiver will first start in FM Receive mode, AM Receive
mode, etc.
c. Clock Configuration: This section displays information on the crystal oscillator clock frequency and
crystal loading cap capacitance. The Clock frequency can not be modified in conjunction with a Quark
Baseboard.
d. Output Mode: Configures tuner and EVB for either analog or MPX output through the
HEADPHONE_OUT and L/R LINE_OUT jacks. Use the HEADPHONE_OUT jack for listening through
headphones or powered speakers. Use the L/R LINE_OUT jack for low-distortion measurements.
Other output modes are not supported by the Quark Baseboard.
e. XTAL Loading Cap: Indicates the crystal frequency trim capacitance. This is retrieved from an
EEPROM on the daughtercard.
Additional options are available in the Firmware Configuration window, shown in Figure 9. “Firmware
Configuration Window”.
8
Rev. 0.4
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