Datasheet

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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 TLV320AIC36EVM,
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 TLV320AIC36EVM 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
1 A0 USB-MODEVM EEPROM I
2
C Address A0
ON: A0 = 0
OFF: A0 = 1
2 A1 USB-MODEVM EEPROM I
2
C Address A1
ON: A1 = 0
OFF: A1 = 1
3 A2 USB-MODEVM EEPROM I
2
C Address A2
ON: A2 = 0
OFF: A2 = 1
4 USB I
2
S I
2
S Bus Source Selection
ON: I
2
S Bus connects to TAS1020
OFF: I
2
S Bus connects to USB-MODEVM J14
5 USB MCK I
2
S Bus MCLK Source Selection
ON: MCLK connects to TAS1020
OFF: MCLK connects to USB-MODEVM J14
6 USB SPI SPI Bus Source Selection
ON: SPI Bus connects to TAS1020
OFF: SPI Bus connects to USB-MODEVM J15
7 USB RST RST Source Selection
ON: EVM Reset Signal comes from TAS1020
OFF: EVM Reset Signal comes from USB-MODEVM J15
8 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 TLV320AIC36 Jumper Locations
Table 2 provides a list of jumpers found on the EVM and their factory default conditions.
Table 2. List of Jumpers
Default
Jumper Position Jumper Description
W1 2-3 When connecting 2-3, microphone bias comes from the EXT_MICBIAS pin on the device; when connecting 1-2, microphone (mic)
bias is supplied by the AVDD_BIAS node. The AVDD_BIAS node can be sourced by two different supplies depending on the jumper
W13 setting or can be sourced by an external supply through TP34 (with W13 removed).
W2 Installed Connects onboard Mic negative terminal to the circuit.
W3 Installed Connects onboard Mic positive terminal to the circuit.
W4 Open Connects the DETECT pin to J11.2.
W5 Installed Provides mic bias to J11.2 through a 2.2kΩ equivalent resistance (W6 not installed) or 1kΩ resistor (W6 installed).
W6 Installed Sets the mic bias resistance to 1 kΩ. Use for differential electret mic configurations.
W7 Installed Connects J11.3 to the circuit.
W8 2-3 Connects J11.3 to ground or 1-kΩ resistor.
W9 Open Connects a 1kΩ load to INT_MICBIAS.
W10 Installed Connects HP_COM to ground.
W11 1-2 Connects AVDD_CP to the on-board regulator (U2) or an external +2.5V supply (through J18.3).
W12 1-2 Connects AVDD_REG to the on-board regulator (U2) or an external +2.5V supply (through J18.3).
W13 1-2 Connects AVDD_BIAS to the on-board regulator (U2) or an external +2.5V supply (through J18.3).
5
SLAU280A–March 2009–Revised October 2012 TLV320AIC36EVM-K
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