topic Re: LPC55s69 PDM in Digital Signal Controllers

LPC55s69 PDM

naasikhendricks — Wed, 25 Sep 2019 18:45:46 GMT

I was search the Data Sheet for the LPC55s69 for PDM support, I can't find it.

Kind Regards

Re: LPC55s69 PDM

mohammad_kamil — Thu, 26 Sep 2019 04:58:24 GMT

Hello Naasik Hendricks,

Please find the weblink to download datasheet.

https://www.nxp.com/docs/en/data-sheet/LPC55S6x.pdf

Kamil

Re: LPC55s69 PDM

xiangjun_rong — Thu, 26 Sep 2019 05:24:21 GMT

Hi, Naasik,

Unfortunately, the LPC55S6x does not have PDM module(digital microphone interface (DMIC)), if you need the DMIC interface, you can use the LPC54xxx family.

LPC54000|Power Efficient 32-bit Microcontrollers (MCUs)|Cortex®-M4 Core | NXP

Hope it can help you

XiangJun Rong

Re: LPC55s69 PDM

naasikhendricks — Thu, 26 Sep 2019 06:08:00 GMT

Hi Xiangjun and Kamil

Thanks. I did read the DataSheet and I didn't find anything @kamil thanks.

@Xiangjun it is so weird that LPC doesn't support DMIC... The way it is marketed for its DSP Accelerator one would expect it to have the features. Imxrt is very limited unless you using 1050/60 I am rather disappointed with this. You the only one who could give a direct answer and I thank you.

The PDM mystery is solved and we continue to soldier on.

Naasik

Re: LPC55s69 PDM

xiangjun_rong — Thu, 26 Sep 2019 06:33:16 GMT

Hi, Naasik,

The LPC55S6x does not support DMIC, but the other LPC processor for example LPC5411x, LPC546xx, LPC540xx all support DMIC.

Pls download UM10912.pdf, which is the UM of LPC546xx from above link.

LPC5410x and LPC5411x are low cost processors.

Hope it can help you

Xiangjun Rong

Re: LPC55s69 PDM

xiangjun_rong — Fri, 27 Sep 2019 03:10:04 GMT

Hi, Naasik,

You can download UM10912.pdf, which describes the peripheral features of LPC546xx:

LPC546XX Microcontroller (MCU) Family | NXP

Hope it can help you

Xiangjun Rong

Re: LPC55s69 PDM

naasikhendricks — Sun, 29 Sep 2019 14:01:08 GMT

Hi Xiangjun

Thank you. Is there application note on using PDM, CMSIS DSP, Audio Cancellation and 3rd Audio?

I actually have a few LPC5410/1 here with me.

Kind Regards

Naasik

Re: LPC55s69 PDM

xiangjun_rong — Mon, 30 Sep 2019 07:42:25 GMT

Hi, Nassik,

It appears that the LPC5411x has PDM module, the LPC5410x does not have PDM module.

I suggest you download the SDK package from the link, the PDM example are included in the SDK package.

MCUXpresso SDK | Software Development for Kinetis, LPC, and i.MX MCUs | NXP

Hope it can help you

Xiangjun Rong