Audio - Cherry theobroma SYSTEMS PX30-mQ7 User Manual

To calculate the Linux GPIO # for CPU pins that are not listed in this table, use the following formula:
Where:
• . . . index of the block number
•
• . . . the pin number within the block
Example:
To enable a GPIO, write the Linux GPIO # to the special export file:
To set the direction to output, write
The GPIO will be set to a value of (high at 3.3V).

3.16 Audio

The board provides two audio connectors for input and output.
connector.
Note: The codec on the Haikou baseboard only supports a sample rate 48kHz . This restriction only applies to this specific
codec on the Haikou baseboard.
The I2S bus on the PX30-uQ7 module supports a sample rate up to 192kHz.
PX30-uQ7 User Manual
© Theobroma Systems Design und Consulting GmbH
Q7 signal CPU pin
GPIO0 GPIO3_C6
GPIO1 GPIO3_D0
GPIO2 GPIO3_C7
GPIO3 GPIO3_D1
GPIO4 GPIO3_C0
GPIO5 GPIO3_A2
GPIO6 GPIO3_A1
GPIO7 GPIO2_B6
. . . the alphabetical index of the block name, minus 1
in the GPIO's direction file:
Linux GPIO #
118
120
119
121
112
98
97
78
is on top and is on bottom of the audio
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