Minimal Circuit required for nRF52832 custom board

RE: Minimal Circuit required for nRF52832 custom board

Jared — Wed, 22 Jun 2022 09:19:49 GMT

ok, can you mark my previous answer as verified if your original question has been answered?:

[quote user=""]

I need help with the minimal circuit board requirement of the custom board with nRF52832 and nRF52840 for wireless and SPI communication.

I need to read vales over wireless communication and show values on display via SPI communication.

[/quote]

RE: Minimal Circuit required for nRF52832 custom board

KKaushik — Wed, 22 Jun 2022 07:49:39 GMT

Hi,

Yes, I am starting with the development kit first but for the final device, I'll use a custom board for a compact size.

Thanks

RE: Minimal Circuit required for nRF52832 custom board

Jared — Wed, 22 Jun 2022 07:46:03 GMT

Hi,

That is one specific module, I was referring to modules in general.

[quote user="KKaushik"]So if I use the "module", can I start programming and use it directly without any external decoupling capacitor or anything else?[/quote]

Most modules comes with the necessary capacitors and matching network needed. See this list for some recommendations.

[quote user="KKaushik"]So if I use the "module", can I start programming and use it directly without any external decoupling capacitor or anything else?[/quote]

Yes, but you would still need to implement the module on a circuit board. If you want to avoid all of this, then you should consider starting with our development kit instead.

regards

Jared

RE: Minimal Circuit required for nRF52832 custom board

KKaushik — Wed, 22 Jun 2022 05:40:58 GMT

Hello,

Thanks for the reply.

I got a bit confused by "module", did you mean this https://www.adafruit.com/product/4077#description

and not the "Adafruit Feather nRF52 Bluefruit LE".

So if I use the "module", can I start programming and use it directly without any external decoupling capacitor or anything else?

Thanks

RE: Minimal Circuit required for nRF52832 custom board

Jared — Tue, 21 Jun 2022 12:15:29 GMT

Hi,

Are you going to use a module or start with just the nRF52832? If the latter, then you'll need to add some decoupling capacitors for VDD and DEC pins + a matching network for radio and antenna, and the 32 MHz crystal. It's all summed up in the reference design, which you can find here.

Modules usually already have all of this implemented, so that would be a great option.

regards

Jared

RE: Minimal Circuit required for nRF52832 custom board

KKaushik — Tue, 21 Jun 2022 07:56:54 GMT

Hello,

I am actually moving from Arduino, as Atmega328p requires an external crystal oscillator with capacitors. For ESP32 we need an external button to keep GPIO0 LOW while uploading code.

So considering that now I'm planning to use nRF52810 (slave which is connected to the e-ink display through SPI) and nRF52832 (master, gateway node), what are the essential and minimal hardware that is required to drive the nRF52 series.

After reading some documents I found for my custom board I need the followings :

a. 4 pin header (for Rx, Tx, Gnd, and Vcc to upload code),

b. 32Mhz crystal oscillator

Other than these you mentioned already nRF52 series have internal pullups/pulldowns.

Thank you,

RE: Minimal Circuit required for nRF52832 custom board

Jared — Mon, 20 Jun 2022 13:12:34 GMT

Hi,

The nRF52 series has internal pullups/pulldowns on each GPIO pin, so nothing external is needed for SPI to work. Just connect the SPI pins SCLK,CS, MISO,MOSI to a slave/master and it should work.

Do you have a specific question regarding this?

regards

Jared