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Questions tagged [i2s]

Despite the name, it is unrelated to the bidirectional I²C bus. I²S is a media-specific protocol which uses at least three signals: Bit CLK, Word CLK, and at least one data line.

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37 views

Does LRCK have to oscillate in an I2S system?

I'm working on a audio function generator using the PCM 1795 DAC. I only need a single output channel for my design. Can I just pull LRCK low or high permanently for the sake of maintaining design ...
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546 views

Synchronize internal DAC to I2S on STM32F4

I have a CS4344 DAC connected to my STM32F407 outputting sound at a 44.1kHz rate with DMA and I2S and I would like to output and envelope signal through the internal DAC of the STM32F4, in sync with ...
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33 views

Synchronizing an oscillator signal and a single wire signal

On some 32bit MCUs(PIC32MX, STM32F4), those SPI pins can read a continuous signal such as I2S/PCM. So I thought to read a single-wire signal that has MHz fixed frequency as SPI. First, I made a ...
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1answer
96 views

SPH0645 timing diagram

I am studying this SPH0645 module for use with a STM32. I started by checking the timing diagram of the I2S and compatibility between this module and the STM32. The STM32L151 MCU is compatible with ...
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1answer
35 views

Can I2S tdm interface send more channels with less sampling frequency?

We have a arm SoC(system on chip) connected with I2S to a DSP (digital signal processor). SoC and DSP both support 48khz, 8 channel and 16bits in TDM mode. Is it possible to use this interface to ...
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1answer
210 views

Codec in 'master mode' require more than one external clock? (MCLK?) to drive I2S system timing to/from MCU slave?

Does an audio codec in 'master mode' require more than the one clock line (MCLK?) to drive and time I2S data sync to MCU or FPGA slave? I understand that the I2S proper consists of three lines - '...
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1answer
88 views

Using RXD to generate Audio signal and serial communication all connected to each other

I'm using RXD to transfer audio to an amplifier (1) and TTL communication with USB/TTL converter (2) for communication. Everything works but I can not get maximum output from the amplifier. When I ...
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0answers
187 views

I2S Fundamentals

I'm trying to get a good understanding of the I2S protocol for a project I'll be working on. My current goal is to take a 24bit, 2 channel .wav file with known, repeating bytes (ex: x00/x00) and view ...
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0answers
1k views

ADC input to raspberry pi - I2C vs I2S

I'm trying to create a microphone array and take readings into a raspberry pi. I'm having an 8 bit ADC connected to the pi via I2C (SCL and SDA pins). I'm able to read samples (0-255) into my pi using ...
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0answers
14 views

Naming confusion, how to connect DAC (BB/TI PCM1603KY) I2S, which pins do I need to use?

I am totally new in the field of DAC's and I2S. I salvaged this board from a DVD player and is well documented. There are three data lines DATA1..DATA3 that will be used for ...
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54 views

my i2s audio signal is not working. i expect this has something to do with ground and resistors, but i need some help with the details

I am more familiar with software, but I have a project going on that has a tiny amount of hardware involved. I would really appreciate some help with this part. I have existing hardware that has a ...
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0answers
144 views

I2S DAC Volume Control

First of all, let me preface this with the fact that I'm not an EE -- I'm a hobbyist with some experience and a background in software development. I'm trying to use a TI PCM5102A Audio DAC with a ...
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79 views

Using a single channel on a 2 channel DAC + Amplifier

I am planning to use an external DAC + amplifier combo to output mono sound from my microcontoller. The ouput from the amplifier would be connected to a single speaker ...
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0answers
519 views

I2S Connections - MEMS Digital Microphone, CODEC, and Raspberry Pi Zero W

I have a MEMS Digital Microphone with PDM output. I am planning to use this: http://www.st.com/content/ccc/resource/technical/document/datasheet/57/af/88/31/7b/59/4f/77/DM00111225.pdf/files/...