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 PCM3070EVM, 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
PCM3070EVM 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 PCM3070 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
Jumper Default Jumper Description
Position
W1 Removed Connects an external microphone bias.
W2 Removed Onboard microphone connect (-).
W3 Removed Onboard microphone connect (+).
W4 Removed Connects bias resistor to IN3_R.
W5 Removed Connects bias resistor to IN3_L.
W6 Removed Provides means to change effective resistance to 1 kΩ for differential microphone.
W7 Installed Connects IN3_R to J5/microphone.
W8 Removed Connects IN3_R to GND or 1-kΩ pulldown.
W9 Removed Connects 16-Ω load to HPL
W10 Removed Connects 16-Ω load to HPR
W11 Removed DC-couples HPL to its output. Use when driving differentially.
W12 Removed DC-couples HPR to its output. Use when driving differentially.
W13 Installed Selects the onboard EEPROM as the TAS1020B firmware source.
5
SLAU331A–January 2011–Revised October 2012 PCM3070EVM-K Evaluation Module
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