Datasheet

EVM Description and Basics

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Table 2. List of Jumpers and Switches (continued)

Default

Jumper Position Jumper Description

W15 Open When installed, connects GPIO4 to reset AND gate (U3).

W16 Installed Provides a means of measuring IOVDD current.

W17 Installed Provides a means of measuring DVDD current.

W18 Installed Provides a means of measuring LDOin/HPVDD current. ???

W19 Installed Provides a means of measuring AVDD current.

W20 2-3 Sets U6 voltage source as +5VD or +5VA for LDOin/HPVDD.

W21 Installed Connects +3.3VD voltage source to IOVDD node.

W22 Open When installed, shorts across the input capacitor on IN2_L for DC measurement option. Remove this jumper for audio connections.

W23 Open When installed, shorts across the input capacitor on IN2_R for DC measurement option. Remove this jumper for audio connections.

SW1 I2C

When set to I2C, the I

C signals from P12/J12 are connected to the codec and SPI_SELECT is set low. When set to SPI, the SPI

signals from P12/J12 are connected to the codec and SPI_SELECT is pulled to IOVDD.

SW2 LOW When set to LOW, AVDD and DVDD are connected to +1.8VA and +1.8VD, respectively, and LDO_SELECT is set low. When set to

HI, AVDD, and DVDD are disconnected from other supplies and LDO_SELECT is pulled to IOVDD.

2.3 Analog Signal Connections

2.3.1 Analog Inputs

The analog input sources can be applied directly to terminal blocks J2, J3, and J4 or input jacks J1 and

J5. The connection details can be found in Appendix A.

2.3.2 Analog Output

The analog outputs are available from terminal blocks J6 and J8 or output jacks J7, J9, and J10. Note that

J10 is provided for signal-to-noise ratio (SNR) measurements only. The connection details can be found in

Appendix A.

2.4 Digital Signal Connections

The digital inputs and outputs of the EVM can be monitored through P12 and P22. If external signals need

to be connected to the EVM, digital inputs must be connected via J14 and J15 on the USB-MODEVM and

the SW2 switch must be changed accordingly (see Section 2.2.1). The connector details are available in

Section A.2.

2.5 Power Connections

The TLV320AIC3254EVM can be powered independently when being used in stand-alone operation or by

the USB-MODEVM when it is plugged onto the motherboard.

TLV320AIC3254EVM-K SLAU264A–October 2008–Revised September 2012

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