STEVAL-MKI126V1
STSmartVoice demonstration board
Data brief
Features
■
2 on-board MEMS MP45DT02 microphones
■
Capable of driving up to 6 digital MEMS
microphones
■
3 independent I2S outputs
■
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
■
Controllable via APWorkbench software suite
■
RoHS compliant
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 I2S signal is routed both on a general and
interface connector. The appropriately filtered
PWM signals provide an analog interface.
The STEVAL-MKI126V1 is equipped with two
MP45DT02 microphones and an STA321MPL
scalable digital microphone processor.
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.
The main function of the STEVAL-MKI126V1 is to
convert the PDM signals from the microphones
into more common I2S and PWM signals.
September 2012
Doc ID 023684 Rev 1
For further information contact your local STMicroelectronics sales office.
1/9
www.st.com
9
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
JQG
/5
6
0,&
9GG
&ON
9GG
&ON
2XW
JQG
/5
/5
6
9
&ON
2XW
JQG
2XW
JQG
/5
6
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+]
$3:OLQN
FRQQHFWRU
!-V
2/9
Doc ID 023684 Rev 1
Doc ID 023684 Rev 1
+
9''
9''B3/
3//)
;7,
6$
&
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',
($3'
5
51)
3'0,1B
3'0,1B
6'2
9''
*1'
/5&.2
&
Q)
9B,17
6
287$
3'0,1B
&.287B/
&
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
5
N
&
S)
.
5
.
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
&. ' 9'' &/5
5
.
5
N
S)
&
&
S)
&
S)
9+&
4
&.
4
&.
8
9B,17
&
X)
&.287B+
&.287B+
0,&B'$7$
3'0,1BB
0,&B'$7$
3'0,1BB
0,&B'$7$
3'0,1BB
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)
&
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&/.
9287
&
S)
5
N
9B,17
&
/5&.2
51)
5
5
5
X)
&
9B,17
X)Y
&
&
Q)
*1'
9,1
*1'
8
,&/'9
%<3$66
0&/.
X)Y
3:'1 -3
-3
9
-
5
5
5
51)
+3287
+3287
0&/.
;7,
26&B&.
&
X)
5
5
5
51)
. 5
&
X)
<
6'2B
5
3:'1
5(6(7
5 /5&.2
-
)$,/
6'$
(1
9B,17
+($'3+21(23
&
S)
;7B$&7,9(
&6;)%&075
9B,17
&
S)
5 &
S)
5 5
087(
6&/
6'2B
%,&.2
6'2B
(1
26&B&.
Schematic diagram 1/5
8
Figure 2.
8
Schematic diagrams
2
-
&13
STEVAL-MKI126V1
Schematic diagrams
!-V
3/9
5
5
51)
Doc ID 023684 Rev 1
'$7$
&/.
'$7$
9''
8
8
0,&B&.
0,&B'$7$B%2$5'
5
5
S)
&
S)
5
5
X)
&
Q)
51)
5
&/.
'287
9''
'$7$
&/.
'$7$
9''
8
8
&
S)
03'7
9''
/5
&/.
/5
03'%
03'7
*1'
/5
*1'
8
*1'
03'7
9''
/5
&/.
/5
03'%
&
&
0,&B9&&
&/.
'287
9''
03'7
*1'
/5
*1'
8
*1'
4/9
*1'
*1'
&
&
S)
5
5
X)
0,&B&.
0,&B'$7$B%2$5'
&
Q)
0,&B9&&
Figure 3.
5
Schematic diagrams
STEVAL-MKI126V1
Schematic diagram 2/5
!-V
Doc ID 023684 Rev 1
5
&
S)
&21
&
S)
-
&21
&21
-
&
S)
-
-
&21
&21
0,&B9&&
&21
-
5
51)
5
51)
5
0,&B&. 5
5
&
0,&B'$7$ S)
-
&21
&21
-
&21
&
S)
-
&
S)
0,&B&. 5
&
S)
5
0,&B'$7$
-
&21
&21
-
-
5
51)
5
51)
0,&B9&&
&21
5
0,&B&. 5
0,&B'$7$
5
&
S)
-3
-3
0,&B&.
5
0,&B9&&
Figure 4.
0,&B'$7$
-
0,&B9&&
STEVAL-MKI126V1
Schematic diagrams
Schematic diagram 3/5
5
5
5
5
5
5
!-V
5/9
Schematic diagrams
Figure 5.
STEVAL-MKI126V1
Schematic diagram 4/5
-IC!RRAYONBOARD-ICSWITCH
,&
$55$<B'(7
0,&B'$7$B%2$5'
6
'
0,&B'$7$
6
9B,17
9&&
0,&B'$7$B$55$<
,1
*1'
&
Q)
,&67*
,&
0,&B'$7$B%2$5'
'
0,&B'$7$
9&&
0,&B'$7$B$55$<
,1
6
6
*1'
&
Q)
,&67*
-
0,&B'$7$
-
0,&B'$7$
-
0,&B'$7$
-
0,&B'$7$
-)#)NPUT3ELECTION)NDICATOR
5
5
5
5
$55$<B'(7
5
9B,17
'
/('
5
,%$/N/NBOARD-IC
,%$/FF-IC!RRAY
!-V
6/9
Doc ID 023684 Rev 1
STEVAL-MKI126V1
Figure 6.
Schematic diagrams
Schematic diagram 5/5
-ICDATALEVELSELECTION
$EFAULTSETTING6
5
0,&B'$7$
5
3'0,1B
5
-)##,/#+3%,%#4)/.
3'0,1BB
5
51)
&.287B/
51)
0,&B&.
5
5
5
51)
0,&B'$7$
&.287B+
3'0,1B
5
5
3'0,1BB
&.287B/
51)
51)
0,&B&.
5
5
&.287B+
5
0,&B'$7$
5
3'0,1B
5
3'0,1BB
-)#!22!9).4%2&!#%
51)
0,&B9&&
$55$<B'(7
5
0,&B&.
0,&B'$7$B$55$<
0,&B'$7$B$55$<
0,&B'$7$
5
3'0,1B
5
3'0,1BB
51)
5
0,&B'$7$
0,&B'$7$
0,&B'$7$
0,&B'$7$
0,&B'$7$
5
-
3'0,1B
5
3'0,1BB
51)
5
0,&B'$7$
5
3'0,1B
5
3'0,1BB
51)
!-V
Doc ID 023684 Rev 1
7/9
Revision history
3
STEVAL-MKI126V1
Revision history
Table 1.
8/9
Document revision history
Date
Revision
18-Sep-2012
1
Changes
Initial release.
Doc ID 023684 Rev 1
STEVAL-MKI126V1
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY TWO AUTHORIZED ST REPRESENTATIVES, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2012 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
Doc ID 023684 Rev 1
9/9