ST STEVAL-MIC008A User manual

Introduction
The STEVAL-MIC008A is an adapter board where two MP23DB01HP digital MEMS microphones are mounted.
The two microphones, mounted with a distance of 30mm, allow to perform some beam forming algorithms able to maximize gain
in some direction.
STEVAL-MIC008A can be mounted on different boards of the STM32H7 discovery kit (for example STM32H735G-DK,
STM32H7B3I-DK, STM32H747I-DISCO).
Figure 1. STEVAL-MIC008A
STEVAL-MIC008A adapter board with two MP23DB01HP MEMS microphones
UM3204
User manual
UM3204 - Rev 1 - July 2023
For further information contact your local STMicroelectronics sales office. www.st.com

1 Getting started
1.1 Features
• Ideal to plug in the STM32H7 discovery kits, as:
–STM32H735G-DK
–STM32H7B3I-DK
–STM32H747I-DISCO
•MP23DB01HP is a bottom port digital MEMS microphones with:
– Voltage supply from 1.52 to 3.6 V
– 135 dBSPL acoustic overload point
– Omnidirectional sensitivity
– Two different operation mode (low power and performance mode)
– Sensitivity -41 dBFs ±1 dB
• Power supply coming from STM32H7 board via CN1 connector of STEVAL-MIC008A
1.2 Precautions for use
During the radiated emissions test according with EN 55032, the STEVAL-MIC008A board is compliance with
EMC standards for radiated emissions in class A (industrial environment intended use).
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Getting started
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2 How to use
Connect STEVAL-MIC008A using connector CN1 with STM32H7xxx discovery kit. If correctly mounted, the LED
LD1 mounted on the bottom of the board, switches on.
Some examples:
Figure 2. Connection with STM32H7B3I-DK
Figure 3. Connection with STM32H747I-DISCO
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How to use
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3 Schematic diagram
Figure 4. STEVAL-MIC008A circuit schematic
MEMS microphones Daughter Board
3V3_MIC_1
DETECTn
DATIN3
DETECTn
CLK_0
DATA_0
DATA_0
CONNECTORS LED
CARD DETECT
3V3_MIC_1
CLK_0
3V3_MIC_1
VCC_LED
VCC_LED
3V3_MIC_1
3V3_MIC_1
CLK_0
DATIN7
1uF
C1
1uF
C7
100nF
C2
100nF
C4
10K
R5
1KR3
1KR6
100RR4
20021221-00020T4LF
1
1
3
3
5
5
7
7
9
9
11
11
13
13
15
15
17
17
19
19
22
44
66
88
10 10
12 12
14 14
16 16
18 18
20 20
CN1
SB1
DATA_0
DATIN7
DATIN2
Close
Open
Fitted: NO
DETECTn
DATIN3
CLK_0
DATA_0
3V3_MIC_1
1
122
3
344
5
566
7
788
10 10 9
9
11
11
13
13 12 12
14 14
CN2
DETECTn : PC12 UART5_TX
VCC_LED : PD2 UART5_RX
MP23DB01HPTR
GND
3
LR 2
CLK 4
VDD
5
DOUT 1
U1
MP23DB01HPTR
GND
3
LR 2
CLK 4
VDD
5
DOUT 1
U2
RED
LD1
VCC_LED
3V3_MIC_1
DATIN2 DATIN1
DATIN3
DATIN1
Open
Open SB3
SB2
SB4
By default:
DATA0 - DATI N7
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Schematic diagram

4 Bill of materials
Table 1. STEVAL-MIC008A bill of materials
Item Q.ty Ref. Part/value Description Manufacturer Order code
1 2 C1, C7 1uF, 0402, 25 V CAPACITOR Murata GRM155R61E105KA12D
2 2 C2, C4 100nF, 0402, 25
VCAPACITOR Multicomp MC0402B104K250CT
3 1 CN1
SMD
Connector, 2x10
1.27mm step
Header, 10x2,
1.27mm, VR,
SMT, Height
5.600mm,
Shrouded
FCI-
AMPHENOL 20021221-00020T4LF
4 1 R3 1K, 0402, 1 W Resistor Panasonic ERJ2GEJ102X
5 1 R4 100R, 0402, 1
WResistor Multicomp PRO MCSR04X101 JTL
6 1 R5 10 K, 0402, 1 W Resistor Multicomp PRO MCMR04X103 JTL
7 1 LD1 Red Led, 0603
LED_0603_OS
RAM_LS-Q976-
NR-1_RED_1A
2K_H0P8
OSRAM LS Q976-Z
8 1 SB1 Solder bridge,
0603
SOLDER-
BRIDGE_R060
3-0R
Multicomp PRO MC0063W06030R
9 2 U1, U2 MP23DB01HPT
R, RHLGA
MEMS
Microphone ST MP23DB01HPTR
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Bill of materials
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5 Board versions
Table 2. STEVAL-MIC008A versions
Finished good Schematic diagrams Bill of materials
STEVAL$MIC008AA (1) STEVAL$MIC008AA schematic diagrams STEVAL$MIC008AA bill of materials
1. This code identifies the STEVAL-MIC008A evaluation board first version.
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Board versions
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6 Regulatory compliance
Notice for US Federal Communication Commission (FCC)
For evaluation only; not FCC approved for resale
FCC NOTICE - This kit is designed to allow:
(1) Product developers to evaluate electronic components, circuitry, or software associated with the kit to
determinewhether to incorporate such items in a finished product and
(2) Software developers to write software applications for use with the end product.
This kit is not a finished product and when assembled may not be resold or otherwise marketed unless all
required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product
not cause harmful interference to licensed radio stations and that this product accept harmful interference. Unless
the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit
must operate under the authority of an FCC license holder or must secure an experimental authorization under
part 5 of this chapter 3.1.2.
Notice for Innovation, Science and Economic Development Canada (ISED)
For evaluation purposes only. This kit generates, uses, and can radiate radio frequency energy and has not been
tested for compliance with the limits of computing devices pursuant to Industry Canada (IC) rules.
À des fins d'évaluation uniquement. Ce kit génère, utilise et peut émettre de l'énergie radiofréquence et n'a pas
été testé pour sa conformité aux limites des appareils informatiques conformément aux règles d'Industrie Canada
(IC).
Notice for European Union
This device is in conformity with the essential requirements of the Directive 2014/30/EU (EMC) and of the
Directive 2015/863/EU (RoHS).
Notice for United Kingdom
This device is in compliance with the UK Electromagnetic Compatibility Regulations 2016 (UK S.I. 2016 No. 1091)
and with the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment
Regulations 2012 (UK S.I. 2012 No. 3032).
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Regulatory compliance
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Revision history
Table 3. Document revision history
Date Revision Changes
07-Jul-2023 1 Initial release.
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Contents
1Getting started ....................................................................2
1.1 Features ......................................................................2
1.2 Precautions for use .............................................................2
2How to use ........................................................................3
3Schematic diagram ................................................................4
4Bill of materials....................................................................5
5Board versions ....................................................................6
6Regulatory compliance ............................................................7
Revision history ........................................................................8
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Contents
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List of tables
Table 1. STEVAL-MIC008A bill of materials ........................................................5
Table 2. STEVAL-MIC008A versions.............................................................6
Table 3. Document revision history ..............................................................8
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List of tables
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