"ESP Series Datasheet" vs "ESP32-WROOM-32 Datasheet"

Fran_iii
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Joined: Mon Apr 05, 2021 3:05 pm

"ESP Series Datasheet" vs "ESP32-WROOM-32 Datasheet"

Postby Fran_iii » Fri Apr 30, 2021 12:02 am

I'm trying to map the ESP32 "module" pins to the pins on the Espressif ESP32-DevKit-V4 board purchased from Mouser...
https://www.digikey.com/en/products/det ... 2D/9356990

The Question:
What is the rectangular "Pin Layout: drawing in section 2.1 of the "ESP32 Series Datasheet" at...
https://www.espressif.com/sites/default ... to,595,989

At first I thought it was the ESP32 "Module" pin layout... it's rectangular... and looks like a "module"...

But then I found the "ESP32-WROOM-32 Datasheet" here...
https://www.espressif.com/sites/default ... eet_en.pdf

and matched that with the ESP32 DevKit V4 schematic from here...
https://dl.espressif.com/dl/schematics/ ... v4-sch.pdf

And it looks like the DevKit board actually has the ESQ32-WROOM-32 module on it... right?

So... What is the rectangular "Pin Layout" illustration in section 2.1 of the "ESP32 Series Datasheet"

Is it a "module" version of the ESP32 DevKit board or what?

Thanks for any help.

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ESP_krzychb
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Re: "ESP Series Datasheet" vs "ESP32-WROOM-32 Datasheet"

Postby ESP_krzychb » Fri Apr 30, 2021 3:26 am

Fran_iii wrote: So... What is the rectangular "Pin Layout" illustration in section 2.1 of the "ESP32 Series Datasheet"

Is it a "module" version of the ESP32 DevKit board or what?

Hi Fran_iii,

"ESP32 Series Datasheet" is for ESP32 chip - https://www.espressif.com/en/products/socs
The illustration in section 2.1 of the dataseet shows the ESP32 chip pin layout.

"ESP32-WROOM-32 Datasheet" is for ESP32-WROOM-32 module - https://www.espressif.com/en/products/modules

Fran_iii
Posts: 18
Joined: Mon Apr 05, 2021 3:05 pm

Re: "ESP Series Datasheet" vs "ESP32-WROOM-32 Datasheet"

Postby Fran_iii » Fri Apr 30, 2021 2:57 pm

ESP_krzychb answered my original post with...
"ESP32 Series Datasheet" is for ESP32 chip - https://www.espressif.com/en/products/socs
The illustration in section 2.1 of the dataseet shows the ESP32 chip pin layout.

"ESP32-WROOM-32 Datasheet" is for ESP32-WROOM-32 module - https://www.espressif.com/en/products/modules

With that in mind I've got a few follow-up questions...

1 - Is the "ESP32 Series Datasheet" "chip" inside the ESP32-WROOM-32 Module?

2 - Or is the ESP32 "chip" the equivalent of the "ESP32-WROOM-32 Module" manufactured as an Integrated Circuit?

3 - Is the ESP32 "chip" what I see on SparkFun ESP32 Thing?

4 - According to page 50 of the "ESP32 Series Datasheet" at...
https://www.espressif.com/sites/default ... to,595,989
the ESP32 "chip" comes in 7 varieties...
ESP32-D0WD-V3 -- Dual core -- No embedded flash
ESP32-D0WDQ6-V3 -- Dual core -- No embedded flash
ESP32-D0WD -- Dual core -- No embedded flash
ESP32-D0WDQ6 -- Dual core -- No embedded flash
ESP32-D2WD -- Dual core -- 2 MB embedded flash (40 MHz)
ESP32-S0WD -- Single core -- No embedded flash
ESP32-U4WDH -- Single core -- 4 MB embedded flash (80 MHz)
Considering the above 7 parts... these questions are with reference to the ESP32-DevKitC-32D from Mouser at...
https://www.mouser.com/ProductDetail/Es ... prEALw_wcB

4a) Is one of these 7 "chips" inside of the "module on the ESP32-DevKitC-32D from Mouser...
4b) Or, is on of the 7 "equivalent circuit" inside of the "module on the ESP32-DevKitC-32D from Mouser...
4c) Or, what?
4d) And how much Flash Memory is on the ESP32 DevKitC-32D?
(I thought it was 4MB but none of the 7 parts listed above have a Dual Core and 4MB of Flash Memory... so confusing... sorry)

Thanks again for any help on getting grounded in all of this.

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ESP_krzychb
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Re: "ESP Series Datasheet" vs "ESP32-WROOM-32 Datasheet"

Postby ESP_krzychb » Sun May 02, 2021 5:42 am

Hi Fran_iii,

1. Yes.
2. No, an ESP module is a small PCB with couple of components (ICs, resistors, capacitors, etc.) installed under a metal can.
3. Yes
4. Comment: for chip variants without embedded flash the flash should be added as a separate IC, either as another component on a module or on a board like for SparkFun ESP32 Thing.
4a. Yes, ESP32-D0WD
4b. ESP32-D0WD chip + external flash on ESP32-WROOM-32D module
4c. -
4d. Basing on the picture and description the board has ESP32-WROOM-32D module installed. Then checking ESP32-WROOM-32D module in https://www.espressif.com/sites/default ... ion_en.pdf the module is available with 4, 8 and 16MB flash. In this case I would ask Mouse directly to be sure as I do not see them listing the exact flash size.

Fran_iii
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Joined: Mon Apr 05, 2021 3:05 pm

Re: "ESP Series Datasheet" vs "ESP32-WROOM-32 Datasheet"

Postby Fran_iii » Mon May 03, 2021 11:59 pm

Thank you ESP_krzychb !
You answered all my questions and I really appreciate it.
I actually figured this out but your answers re-assured me I had figured it out correctly.

The OP original post and follow-up have been ANSWERED and SOLVED.

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