STEVAL-MKI126V1
STSmartVoice demonstration board
based on MP45DT02
Data brief
Description
The STEVAL-MKI126V1 demonstration board
allows the connection of up to six microphones
using the sockets provided, or through the
connection of a dedicated six-microphone array.
The digital interface of the board allows the
interfacing of the MIC output to the most widely
used audio receivers and digital amplifiers, or
permits evaluation of the MIC with generic audio
measurement equipment. The filtered PWM
signals allow the connection of a headset to listen
to audio received through the microphones.
The fully digital path ensures a high level of
processing with sound preconditioning, filtering
and voice enhancement.
Features
• 2 on-board MEMS MP45DT02 microphones
• Capable of driving up to 6 digital MEMS
microphones
• 3 independent I2S outputs
The main function of the STEVAL-MKI126V1 is to
convert the PDM signals from the microphones
into more common I2S and PWM signals.
The I2S signal is routed both on a general and
interface connector. The appropriately filtered
PWM signals provide an analog interface.
• Up to 10 independent 32-bit user
programmable biquads per channel
• The board is fully compatible with the:
– STEVAL-MKI129V1/V2/V3
– STEVAL-MKI131V1/V2/V3
– STEVAL-MKI116V1
– STEVAL-MKI117V1/V2
– STEVAL-CCA035V1
The STEVAL-MKI126V1 is equipped with two
MP45DT02 microphones and an STA321MPL
scalable digital microphone processor.
• Controllable via APWorkbench software suite
• RoHS compliant
June 2013
DocID023684 Rev 2
For further information contact your local STMicroelectronics sales office.
1/9
www.st.com
Block diagram
1
STEVAL-MKI126V1
Block diagram
Figure 1. STEVAL-MKI126V1 block diagram
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