STEVAL-MKI138V1 STMicroelectronics, STEVAL-MKI138V1 Datasheet

STEVAL-MKI138V1

Manufacturer Part Number

STEVAL-MKI138V1

Description

Audio IC Development Tools MEMS MIC STM32F107 MP45DT02 Eval BRD

Manufacturer

STMicroelectronics

Type

Microphonesr

Datasheet

1.STEVAL-MKI138V1.pdf (4 pages)

Specifications of STEVAL-MKI138V1

Product Category

Audio IC Development Tools

Rohs

yes

Product

Demonstration Boards

Tool Is For Evaluation Of

MP34DT01, STM32

Operating Supply Voltage

1.8 V

Description/function

MEMS microphone demonstration board based

Maximum Operating Temperature

+ 85 C

Minimum Operating Temperature

- 40 C

For Use With

MP34DT01, STM32

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Features

• Powered and connected to PC through USB

• Sound card automatically recognized by the

• MEMS microphones provide a high frequency

• Audio collected from the microphones is sent to

• LED status indicator

• RoHS compliant

March 2013

MEMS microphone demonstration board based on the MP34DT01

PC as an audio device.

data stream (1 to 3.25 MHz) of 1 bit digital

samples (PDM technique)

the PC through USB

Bottom view

Top view

DocID024359 Rev 1

Description

The purpose of STEVAL-MKI138V1 is to provide

a demonstration of decoding and streaming of

digital MEMS microphone outputs.

The STEVAL-MKI138V1 demonstration board

hosts the MP34DT01 (top-port digital

microphone), working as a sensor and the

STM32F107RC microcontroller, which functions

as an audio decoder.

These microphones are analog-to-digital

transducers. They are capable of sensing sound

pressure and converting it to a digital signal using

the PDM technique.

The STM32 microcontroller decodes the PDM

signals from the microphones and streams the

audio via USB.

The STEVAL-MKI138V1 is a sound card

automatically recognized by the PC as an audio

device. Connection is made through a USB cable,

which both powers the board and streams the

audio collected from the microphones to the PC.

It is also possible to use the STEVAL-MKI138V1

as an interface board for other microphone

boards (STEVAL-MKI126Vx), in which case use

of the APWorkbench software tool is

recommended.

STEVAL-MKI138V1

www.st.com

and STM32

Data brief

1/4

Related parts for STEVAL-MKI138V1

STEVAL-MKI138V1 Summary of contents

Page 1

... Connection is made through a USB cable, which both powers the board and streams the audio collected from the microphones to the PC also possible to use the STEVAL-MKI138V1 as an interface board for other microphone boards (STEVAL-MKI126Vx), in which case use of the APWorkbench software tool is recommended ...

Page 2

... Application block diagram 1 Application block diagram Figure 1. Microphone USB demonstration board block diagram 2/4 DocID024359 Rev 1 STEVAL-MKI138V1 ...

Page 3

... STEVAL-MKI138V1 2 Revision history Date 01-Mar-2013 Table 1. Document revision history Revision 1 Initial release. DocID024359 Rev 1 Revision history Changes 3/4 ...

Page 4

... 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 4/4 Please Read Carefully: © 2013 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com DocID024359 Rev 1 STEVAL-MKI138V1 ...

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