树莓派麦克风模块—Adafruit I2S MEMS Microphone Breakout.pdf

发布时间：2022-06-08 发布人：admin 分类：说明书资料大小：2.51M 资料格式：pdf 举报版权申诉

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第1页.png

第1页 / 共26页

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第2页.png

第2页 / 共26页

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第3页.png

第3页 / 共26页

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第4页.png

第4页 / 共26页

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第5页.png

第5页 / 共26页

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第6页.png

第6页 / 共26页

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第7页.png

第7页 / 共26页

weixin_40973138-12414452-adafruit-i2s-mems-microphone-breakout.pdf-第8页.png

第8页 / 共26页

文本预览

Adafruit I2S MEMS Microphone Breakout Created by lady ada Last updated on 2020-04-21 05:52:19 PM EDT

Overview For many microcontrollers, adding audio input is easy with one of our analog microphone breakouts (http://adafru.it/1063). But as you get to bigger and better microcontrollers and microcomputers, you'll find that you don't always have an analog input, or maybe you want to avoid the noise that can seep in with an analog mic system. Once you get past 8-bit micros, you will often find an I2S peripheral, that can take digital audio data in! That's where this I2S Microphone Breakout comes in. Instead of an analog output, there are three digital pins: Clock, Data and Word-Select. When connected to your microcontroller/computer, the 'I2S Master' will drive the clock and word-select pins at a high frequency and read out the data from the microphone. No analog conversion required! © Adafruit Industries https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout Page 3 of 27

The microphone is a single mono element. You can select whether you want it to be on the Left or Right channel by connecting the Select pin to power or ground. If you have two microphones, you can set them up to be stereo by sharing the Clock, WS and Data lines but having one with Select to ground, and one with Select to high voltage. This I2S MEMS microphone is bottom ported, so make sure you have the hole in the bottom facing out towards the sounds you want to read. It's a 1.6-3.3V device only, so not for use with 5V logic (its really unlikely you'd have a 5V- logic device with I2S anyways). Many beginner microcontroller boards don't have I2S, so make sure its a supported interface before you try to wire it up! This microphone is best used with Cortex M-series chips like the Arduino Zero, Feather M0, or single-board computers like the Raspberry Pi. © Adafruit Industries https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout Page 4 of 27

Assembly Assembly is really easy, you can use straight or 'right-angle' style headers to attach to the PCB. We'll be using the plain straight headers included The board comes with all surface-mount components pre-soldered. The included header strip can be soldered on for convenient use on a breadboard or with 0.1" connectors. You can also skip this step and solder on wires. Prepare the header strip: Cut the strip to length if necessary. It will be easier to solder if you insert it into a breadboard - long pins down Add the breakout board: Place the breakout board over the pins so that the short pins poke through the breakout pads Make sure the side with the components is face down, as shown in the photos in this guide! © Adafruit Industries https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout Page 6 of 27

And Solder! Be sure to solder all 5 pins for reliable electrical contact. (For tips on soldering, be sure to check out our Guide to Excellent Soldering (https://adafru.it/aTk)). © Adafruit Industries https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout Page 7 of 27

You're done! Check your solder joints visually and continue onto the next steps © Adafruit Industries https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout Page 8 of 27

Pinouts Unlike most of our breakouts, this sensor has the detection element on the bottom of the PCB, so we expect you to solder it 'upside down' with the sensor package on the bottom and the port on top! Power Pins 3V - this is the power in pin. Technically it can be powered from as low as 1.6V to 3.6V but you'll need to make sure your logic level matches! GND - power and data ground I2S Data Pins BCLK - the bit clock, also known as the data clock or just 'clock' - comes from the I2S master to tell the microphone its time to transmit data. This should run at 2-4 MHz but we've found you can often run it a little slower and it'll work fine DOUT - the data output from the mic! LRCLK - the left/right clock, also known as WS (word select), this tells the mic when to start transmitting. When the LRCLK is low, the left channel will transmit. When LRCLK is high, the right channel will transmit. SEL - the channel select pin. By default this pin is low, so that it will transmit on the left channel mono. If you connect this to high logic voltage, the microphone will instantly start transmitting on the right channel. © Adafruit Industries https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout Page 9 of 27

分享到：

赞收藏

资料库

树莓派麦克风模块—Adafruit I2S MEMS Microphone Breakout.pdf

相关推荐

课程资源

热门标签

最新资料