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4.9

GPIO Tab

TLV320AIC3104EVM Software

Figure 11. GPIO Tab

The GPIO tab (see Figure 11) selects options for the general-purpose inputs and outputs (GPIO) of the

TLV320AIC3104. Many pins on the TLV320AIC3104 are denoted as multifunction pins, meaning they may

be used for many different purposes.

The GPIO1 group box contains controls for setting options for the GPIO1 pin. The Function control

selects the function of GPIO1 from the following:

• ADC Word Clock

• An output clock derived from the reference clock (see TLV320AIC3104 data sheet)

• Interrupt output pin to signal:

–

Short Circuit

–

AGC Noise Threshold detection

–

Jack/Headset detection

• For use as an interrupt output, the behavior of the interrupt can be selected using the Interrupt

Duration control. A Single, 2ms pulse can be delivered when the selected interrupt occurs, or

Continuous Pulses can be generated signaling the interrupt.

• Alternate I2S Word Clock

• A digital microphone output–modulator clock for use with a digital microphone (see Section 4.7 and the

TLV320AIC3104 data sheet).

• A general-purpose I/O pin

–

If selected as a General Purpose Input, the state of the GPIO1 pin is reflected by the Input Level

indicator. If selected as a General Purpose Output, the state of the GPIO1 pin can be set by using

the Output Level button.

SLAU218 – August 2007

TLV320AIC3104EVM and TLV320AIC3104EVM-PDK

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