XE3000DVK Semtech, XE3000DVK Datasheet - Page 6

• Manufacturer Part Number: XE3000DVK
• Manufacturer: Semtech

Specifications of XE3000DVK

• Lead Free Status / Rohs Status: Not Compliant

7.3
The development kit is controlled by a Semtech Microcontroller XE8805 [22], which sets the voltage supply value
for the XE3006 CODEC, receives the CODEC settings from a personal computer via a serial line (RS232), writes
these settings in the CODEC registers. It also enables the data coming from the optical digital audio interface to be
converted in the CODEC.
The software enables you to configure the board and the XE3006 CODEC. The graphical user interface (Figure 3)
shows all the possibilities available, and the CODEC registers in full view. See Chapter 4 “Operating the
Development Kit from a PC for evaluation purposes” for a description of the software functionality.
A “reset lc05” button [15] is situated near the XE8805 [22]. This button resets the entire system to the following
state:
Supply of the CODEC at 3.3V.
CODEC in loopback mode with maximal gain on the microphone input, MCLK in divided by 1 mode and
After a reset, the state of the “GUI” must be initialized in order to reflect the state of the CODEC as explained in
Chapter 4.
7.4
All the functions are accessible only if the external power supplies are used.
The XE3000 development kit needs a positive power supply of 9 to15V. The supply is regulated on the board to 5V.
A negative power voltage of –9 to –15V, regulated to –5V, is required in order to use the audio power output.
The supply of the CODEC can vary from 1.8 to 3.3V set by the “GUI” on a personal computer.
An onboard battery holder [12] is also available for a direct test of the CODEC without the personal computer. The
switch “sw6” (Bat/Supply) [13] permits you to change between the battery and the main supply. In addition an
external Vbat can be connected to the “ext Vbat” connector [12b] and by selecting the Vbat needed with the jumper
“I/E Vbat” [14].
7.5
The onboard microphone [2] allows the user to use the ADC without having to put any additional element to the
board. The digital data is sent directly through the DAC and can be heard with the headphone at power up.
The power supply of the microphone can be chosen via the jumper “pwrmic” [5] between the supply given from the
CODEC or the variable power source.
An external source can replace the microphone, if wanted, by changing the jumper “mic” [4] and using the smc
connector “ext mic” [2b]
7.6
If you want to listen directly to the analog CODEC output, you can connect the headphone to the 3.5mm jack plug
“R43” (out CODEC) [18] or to the connector “R42” [20] (between 1-2).
If you need an amplified output signal (maximum 1 W), connect to the 3.5mm jack plug “R47” (out power) [19] or to
the connector “R42 [20] (between 3-4).
© Semtech 2006
System control
Supply
Onboard electret microphone
Analog output
microphone supply enabled.
6
Development Kit for XE3000 Series
Users Guide XE3000DVK
www.semtech.com