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 Features and voice enhancement. 2 on-board MEMS MP45DT02 microphones The main function of the STEVAL-MKI126V1 is to Capable of driving up to 6 digital MEMS convert the PDM signals from the microphones 2 microphones into more common I S and PWM signals. 2 3 independent I2S outputs The I S signal is routed both on a general and Up to 10 independent 32-bit user interface connector. The appropriately filtered programmable biquads per channel PWM signals provide an analog interface. The board is fully compatible with the: The STEVAL-MKI126V1 is equipped with two STEVAL-MKI129V1/V2/V3 MP45DT02 microphones and an STA321MPL scalable digital microphone processor. STEVAL-MKI131V1/V2/V3 STEVAL-MKI116V1 STEVAL-MKI117V1/V2 STEVAL-CCA035V1 Controllable via APWorkbench software suite RoHS compliant June 2013 DocID023684 Rev 2 1/9 For further information contact your local STMicroelectronics sales office. www.st.com6& 6 Block diagram STEVAL-MKI126V1 1 Block diagram Figure 1. STEVAL-MKI126V1 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 3 ,& 0 )OLS I ORS 26 26 &. 26 / , 6 FRQQHF WRU 9 5HJX ODWRU 5HJX ODWRU QN + G 9 FRQQHF WRU 0 Y 2/9 DocID023684 Rev 2 *Q 0 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 &ON 2XW &ON 2XW &ON 2XW &ON 9 UUD WRU FRQQHF