STEVAL-MKI126V1

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 $UUD\FRQQHFWRU 67$03B(9%9(5 0,& 9GG 0,& 0,& 9GG &ON 2XW /5 6 0,& 9GG &ON 9GG &ON 2XW /5 JQG /5 JQG 6 9 &ON 2XW 2XW /5 JQG 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 $0Y 2/9 DocID023684 Rev 2 DocID023684 Rev 2 + 9'' 9''B3/ 3//) ;7, 6$   & 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 %