Jumper Settings
3-6
3.2 Jumper Settings
There are two jumpers on the EVM.
-JP1 is used to select the communication mode of the EVM. Position 1–2
sets the mode for SPI. Position 2–3 sets the mode for I2C. The GUI
software was developed for I2C communication. For SPI the end-user
needs to create the necessary code. Signals needed for SPI are available
on the EVM.
-JP2 is used to select or deselect the onboard crystal for MASTER CLOCK.
Choose one of the following jumper configurations before applying power to
the EVM:
MASTER CLOCK SOURCE JP2 Y1
Master clock from onboard crystal OUT IN
Master clock supplied externally IN OUT
3.3 TLV320AIC23 EVM2 Power
The TLV320AIC23 EVM2 is powered by an external 5-Vdc power supply (not
included) to a 2,5-mm mini power jack, PJ1. LED1 indicates when power is
applied to the board.
3.4 Analog Connections

3.4.1 Microphone

A 3,5-mm mono jack is available for the microphone input, J3.

3.4.2 LINE IN Connections

A 1.0-V rms (max) input is available at the LINE IN jacks. Two connection types
are available.
-Independent left/right RCA jacks, J1L and J1R.
-3,5-mm stereo mini jack, J1.

3.4.3 Headphones

A headphone connection is available at J4 for 16- or 32-Ω loads. J4 is a
3,5-mm stereo mini jack.

3.4.4 LINE OUT Connectors

A 1.0-V rms (max) output is available at the LINE OUT jacks. Two connection
types are available.
-Independent left/right RCA jacks, J2L and J2R.
-3,5-mm stereo mini jack, J2.