mikroElektronika Audio Codec Proto User manual

AUDIO CODEC PROTO™
Manual
All Mikroelektronika’s development systems feature a large number of peripheral
modules expanding microcontroller’s range of application and making the
process of program testing easier. In addition to these modules, it is also
possible to use numerous additional modules linked to the development system
through the I/O port connectors. Some of these additional modules can operate
as stand-alone devices without being connected to the microcontroller.
Additional board

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Figure 1: AUDIO CODEC PROTO
How to connect the board?
The additional board is connected to a microcontroller via pads CN2. A 3.5mm connector CN23 is used to connect a
microphone, whereas the CN22 connector is used to connect earphones.
How to use the board?
The board is used to convert digital audio recording into analog audio signal that is reproduced via headphones. It
is also used to convert analog audio signal from microphone into digital audio recording. Data transfer between the
microcontroller and additional board is performed via the Serial Peripheral Interface (SPI), whereas the operation of the
board is controlled by the microcontroller via I2C communication.
AUDIO CODEC PROTO
The AUDIO CODEC PROTO additional board enables the microcontroller to be connected to a microphone and
headphones via I2C and SPI serial communications.
Key features:
- Stereo CODEC;
- Driver for earphones;
- Low power consumption;
- 3.3V power supply voltage.

MikroElektronika
Figure 2: AUDIO CODEC PROTO additional board connection schematic
The function of pins:
SCK - Digital Audio Bit Clock, Pull Down
MISO - ADC Digital Audio Data Output
MOSI - DAC Digital Audio Data Input
ADCL - ADC Sample Rate Left/Right Clock, Pull Down
DACL - DAC Sample Rate Left/Right Clock, Pull Down
SDA - 3-Wire MPU Data Input / 2-Wire MPU Data Input
SCL - 3-Wire MPU Clock Input / 2-Wire MPU Clock Input
Figure 3: Dimensions of the additional board
NOTE: Pull up/pull down is only present when Control Register Interface is ACTIVE=0 in order to save power.

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