Datasheet

JP7

VDD33

JP7

VDD_EXT

www.ti.com

Input/Output Connectors

above).

• J5 4-pin I2C Input/Output – Connect SDA, SCL, VSS, and VDD33 to external I2C peripherals or

controllers here. The EVM board provides the recommended 4.7kΩ pull-up resistors.

• J6 USB Connector for USB-to-I2C Controller – Connect USB cable to host PC to use the ALP

evaluation software with the EVM board.

• J7 5V External Power Input (optional) – Connect a +5V center-positive 2.1mm barrel connector here

to supply power to the board. Onboard regulators supply the devices with 3.3V VDDIO and 3.3V/1.8V

VDDIO supplies. Do not connect J8/J9 if this connector is used.

• J8 +3.3V VDD33 Power Input – Connect to 3.3V power supply.

• J9 VSS Power – Connect to system ground (GND).

• JP1/JP2 Reserved – Do not populate or connect to external inputs/outputs

• JP3 I2S/GPIO Input/output Header – Connect to I2S input pins or bidirectional GPIO pins. See the

device datasheet for detailed I2S and GPIO usage.

• JP5 Reserved – Do not short or connect to external inputs/outputs

• JP6 VDDIO_EXT Power Input – Connect to independent external VDDIO supply if VDDIO ≠ VDD33

• JP7 VDDIO Select – Connect jumper to select VDDIO=VDD33 [2-3] or VDDIO=VDDIO_EXT [1-2]

3-2. VDDIO Select (JP7) Jumper Settings

• JP8 LOCK Monitor – Probe LOCK status here.

• JP9 AUX Power – Alternative power connection header. See board schematics for details.

• JP10 INTB_IN – General-purpose interrupt. See device datasheet for control register and usage

descriptions.

• JP11 I2C Power Enable – Place jumper (default) to provide 3.3V power to on-board I2C pull-up

resistors.

• JP12 PASS Monitor – Probe PASS status here.

• SW1 PDB Reset – Press to set PDB LOW (device resets and all registers are cleared to default

values).

• SW2 ALP Reset – Resets onboard USB-to-I2C hardware.

SNLU131–February 2013 Evaluation Hardware Overview