STEVAL-MKI126V3

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 and voice enhancement. Features • 2 on-board MEMS MP34DT01 microphones on board • Capable of driving up to 6 digital MEMS microphones The main function of the STEVAL-MKI126V3 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. appropriately filtered PWM signals provide an analog interface. • 3 independent I2S outputs • Up to 10 independent 32-bit user programmable biquads per channel • The demonstration board is fully configurable with: – STEVAL-MKI129V1/V2/V3 – STEVAL-MKI131V1/V2/V3 – STEVAL-MKI116V1 – STEVAL-MKI117V1/V2 – STEVAL-CCA035V1 The STEVAL-MKI126V3 is equipped with two MP34DT01 microphones and an STA321MPL scalable digital microphone processor. • Controllable via APWorkbench software suite • RoHS compliant June 2013 DocID023685 Rev 2 For further information contact your local STMicroelectronics sales office. 1/9 www.st.com Block diagram 1 STEVAL-MKI126V3 Block diagram Figure 1. STEVAL-MKI126V3 block diagram $UUD\FRQQHFWRU 67$03B(9%9(5 0,& 9GG 0,& 0,& 9GG &ON 2XW /5 JQG 6 0,& 9GG &ON 9GG &ON 2XW /5 JQG /5 6 9 &ON 2XW JQG 2XW /5 6 JQG 6 - - 6: 9GG &ON /5 2XW 6 9 JQG +LJK 9 0,& 6 6: 6 6 6 6 6 2XW JQG 3'0,QWHUIDFH 0,& 67$03 )OLSIORS &.  9 ,& /5&. %,&. ,6 [ 6'2 6'2 6'2  6 5HJXODWRU 9 6&/ -3 6'$ 6 3:0 9 6 5HJXODWRU 9 +3-DFN 9 2S$PS &ON 6 /RZ 9 6 9GG /5 6 /HYHOVKLIWHU ,6 FRQQHFWRU 9 *QG 9 0+] $3:OLQN FRQQHFWRU $0Y 2/9 DocID023685 Rev 2 DocID023685 Rev 2 + 9'' 9''B3/ 3//) ;7, 6$   & S) *1'B3/   51) 5 5 5  6'2  & Q)  & Q) &.287  9'' + 6'2  9'' & Q) 9B,17  + *1'  9''  9''             9'' 287$  287%  *1' 9'' 287% 287$ 287% 287$ 287% 287$ 9'' *1' 287$  287%  9'' &.287B+  5 . *1' 9B,17 %,&.2 /5&.2 6'2B 6'2B 6'2B 9 287$ 287%  287$  ;7, 287% 6&/ 3//% 5(6(7 *1' 9B,17 6'$ 9'' *1' %,&.2     6&/ 6'2 9'' %,&., /5&.,   9'' + 6'$  3'0,1B 6', 9''   3'0,1B 5(6(7  3'0,1B 6', 6', 6', 6 ($3'  5 51)   3'0,1B   3'0,1B 6'2 9'' *1' /5&.2 & Q) 9B,17     &.287B/ 287$ 3'0,1B  &.287B+ 0,&B'$7$ 3'0,1BB & Q) & Q) & Q) 9B,17 9B,17 . 5 . 5 5 . 5 . 9B,17 ($3' &.287B+ &.287B+ S) & & S)        . 5 . 5 5 . 5 . *1' 4 4 35 &. ' &/5 4 ' 4 ' 5 N & S) . 5 . 5    8 76 5 N *1' ,1 ,1 & Q)     +3287 ,1 ,1 287 9&& +3287 &.287B+ 287 & S)     5 N 9B,17 4 4 35 &.  5 N 5 .  '  &/5 9''  5 . 5 N S) & & S) & S) 9+& 4 &. 4 &. 8 9B,17 & X) &.287B+     0,&B'$7$ 3'0,1BB 0,&B'$7$ 3'0,1BB & Q) 287% ;B+($'(5  6'2B  6'2B      092 *1' 9''    & Q) 9B,17 67( 2( ,2B9/ *1' ,2B9&& ,2B9/ ,2B9&& ,2B9&& ,2B9&& ,2B9/ ,2B9/   ,)B&/.           & Q) & Q) 5 . 9B,17 &.287B+ &.287B/ ,2B9/ ,2B9&& ,2B9/ ,2B9&& ,2B9/ ,2B9&&    9B,17 3:'1 0,&B'$7$ 3'0,1BB         - 9B,17 0,&B9&& X) & 9 & X) 3'0,1BB 0,&B'$7$ 3'0,1BB ,2B9&& 9&& ,2B9/ 9/   & Q)     8 9B,17   5 5 51) 5  9,1+  /'6;; 287 0,&B'$7$ & Q) 9  %,&.2  9B(;7 9B,17 9  & Q) 9,1 8 9 & Q) 9B(;7  6'2B ,)B&/.     /5&.2 51) 5 5 5 X) & 9B,17  9287 *1'  X)Y & & Q) *1' 9,1 %