ESP32-C3-MINI Pin Analysis

J

jecstronic

Check datasheet for this component and make lists of bootstrap pins, input only pins, pins connected to internal memory, USB pins(if present)

flux

I extracted the ESP32-C3-MINI-1-N4 datasheet pin groups into a project file: ESP32-C3-MINI-1-N4 special pin lists from datasheet. Summary: strapping/bootstrap pins are IO2/GPIO2, IO8/GPIO8, IO9/GPIO9; the only input-only pin is EN; USB pins are IO18/USB_D− and IO19/USB_D+; internal flash uses chip-side SPI0/1 signals GPIO12–GPIO17, not exposed as module pins.
Check special pins
Review 3V3 rail
Document pin constraints
Inspect USB nets
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Files

Pins

Symbol

Layout

3D View

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Name
Pin #
Type
Section
Pin Group
Orientation
Order
Sub-symbol
Terminal Type
GND
1
Unspecified
GND
Bottom
10
powerIn
GND
2
Unspecified
GND
Left
10
powerIn
3V3
3
Unspecified
POWER
Top
1
powerIn
NC
4
Unspecified
NC
Right
6
notConnected
IO2
5
Unspecified
BOOTSTRAP
Left
3
bidi
IO3
6
Unspecified
GPIO
Left
4
bidi
NC
7
Unspecified
NC
Right
6
notConnected
EN
8
Unspecified
PROGRAMMING
Left
2
INPUT
NC
9
Unspecified
NC
Right
6
notConnected
NC
10
Unspecified
NC
Right
6
notConnected
GND
11
Unspecified
GND
Left
10
powerIn
IO0
12
Unspecified
GPIO
Left
4
bidi
IO1
13
Unspecified
GPIO
Left
4
bidi
GND
14
Unspecified
GND
Right
10
powerIn
NC
15
Unspecified
NC
Left
6
notConnected
IO10
16
Unspecified
GPIO
Right
4
bidi
NC
17
Unspecified
NC
Left
6
notConnected
IO4
18
Unspecified
GPIO
Left
4
bidi
IO5
19
Unspecified
GPIO
Right
4
bidi
IO6
20
Unspecified
GPIO
Right
4
bidi
IO7
21
Unspecified
GPIO
Right
4
bidi
IO8
22
Unspecified
BOOTSTRAP
Right
3
bidi
IO9
23
Unspecified
BOOTSTRAP
Right
3
bidi

ESP32-C3-MINI-1-N4