SCAS290 datasheet(5/53 Pages) TI

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EVM Description and Basics

2.2

Default Configuration and Connections

2.2.1

USB-MODEVM

Table 1 provides a list of the SW2 settings on the USB-MODEVM. For use with the TLV320AIC3204EVM,

SW-2 positions 1, 3, 4, 5, 6, and 7 must be set to ON, whereas SW-2.2 and SW-2.8 must be set to OFF. If

the TLV320AIC3204EVM is to be used with an external audio interface, SW2.4 and SW2.5 also need to

be set to OFF and such interface must be connected as explained in Section 2.4

Table 1. USB-MODEVM SW2 Settings

SW-2 Switch Number

Label

Switch Description

USB-MODEVM EEPROM I

2C Address A0

ON: A0 = 0

OFF: A0 = 1

USB-MODEVM EEPROM I

2C Address A1

ON: A1 = 0

OFF: A1 = 1

USB-MODEVM EEPROM I

2C Address A2

ON: A2 = 0

OFF: A2 = 1

USB I

2S Bus Source Selection

ON: I

2S Bus connects to TAS1020

OFF: I

2S Bus connects to USB-MODEVM J14

USB MCK

2S Bus MCLK Source Selection

ON: MCLK connects to TAS1020

OFF: MCLK connects to USB-MODEVM J14

USB SPI

SPI Bus Source Selection

ON: SPI Bus connects to TAS1020

OFF: SPI Bus connects to USB-MODEVM J15

USB RST

RST Source Selection

ON: EVM Reset Signal comes from TAS1020

OFF: EVM Reset Signal comes from USB-MODEVM J15

EXT MCK

External MCLK Selection

ON: MCLK Signal is provided from USB-MODEVM J10

OFF: MCLK Signal comes from either selection of SW2-5

2.2.2

TLV320AIC3204EVM Jumper Locations

Table 2 provides a list of jumpers found on the EVM and their factory default conditions.

Table 2. List of Jumpers and Switches

Default

Jumper

Position

Jumper Description

2-3

When connecting 2-3, microphone bias comes from the MICBIAS pin on the device; when connecting 1-2, microphone (mic) bias is

supplied through TP8.

Installed

Connects onboard Mic negative terminal to the circuit.

Installed

Connects onboard Mic positive terminal to the circuit.

Open

Provides mic bias to J5.3 (disconnect W2 and W3 before installing this jumper). Use for stereo electric microphones only.

Installed

Provides mic bias to J5.2 and onboard Mic positive terminal.

Installed

Sets the mic bias resistance to 1 k

Ω. Use for differential electric mic configurations.

Installed

Connects J5.3 and onboard Mic negative terminal to the circuit.

2-3

Connects J5.3 and onboard Mic negative terminal to AVSS or 1-k

Ω resistor.

Open

Connects 16-

Ω load to HPL outputs.

W10

Open

Connects 16-

Ω load to HPR outputs.

W11

Open

When installed, shorts across the output capacitor on HPL; remove this jumper if using AC-coupled output drive

W12

Open

When installed, shorts across the output capacitor on HPR; remove this jumper if using AC-coupled output drive

W13

Installed

When installed, it selects onboard EEPROM as firmware source.

W14

1-2

When set to 1-2, SCLK/MIC_DET is used for SPI SCLK. When set to 2-3, SCLK/MIC_DET is used for headset detection.

SLAU266A – October 2008 – Revised October 2012

TLV320AIC3204EVM-K

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