STEVAL-MKI126V3 STSmartVoice demonstration board based on MP34DT01 Data brief Description The STEVAL-MKI126V3 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 Features and voice enhancement. 2 on-board MEMS MP34DT01 microphones on The main function of the STEVAL-MKI126V3 is to board convert the PDM signals from the microphones 2 Capable of driving up to 6 digital MEMS into more common I S and PWM signals. microphones 2 The I S signal is routed both on a general and 2 3 independent I S outputs interface connector. appropriately filtered PWM Up to 10 independent 32-bit user signals provide an analog interface. programmable biquads per channel The STEVAL-MKI126V3 is equipped with two The demonstration board is fully configurable MP34DT01 microphones and an STA321MPL with: scalable digital microphone processor. STEVAL-MKI129V1/V2/V3 STEVAL-MKI131V1/V2/V3 STEVAL-MKI116V1 STEVAL-MKI117V1/V2 STEVAL-CCA035V1 Controllable via APWorkbench software suite RoHS compliant June 2013 DocID023685 Rev 2 1/9 For further information contact your local STMicroelectronics sales office. www.st.com6& 6 Block diagram STEVAL-MKI126V3 1 Block diagram Figure 1. STEVAL-MKI126V3 block diagram 03B(9% 9(5 67 ,& 0 ,& 0 ,& 0 ,& 0 9GG 9GG 9GG 9GG / 5 JQG / 5 JQG / 5 JQG / 5 JQG 9GG VKLIW U H /HY O H / 5 JQG +LJK /R Z ,& 0 N 9GG P S 2S 0 3 0 ,QWHUIDFH . /5& / 5 JQG ,& 0 3 26 )OLS I ORS 26 &. 26 / , 6 FRQQHF WRU 9 5HJX ODWRU 5HJX ODWRU NQ G 9 + FRQQHF WRU 0 Y 2/9 DocID023685 Rev 2 0 *Q 9 9 3:OL 6 -3 6 6 9 , & 6 , 6 67 0 &.%, 9 3: 2XW &ON +3 -DF 9 6: 6 6 6 6 6 6 6 9 9 9 2XW &ON 6 6 6: - - 6 6 6 6 2XW 2XW 2XW 2XW &ON &ON &ON &ON 9 UUD WRU FRQQHF