User's Manual

1 Overview
1.2 Pin Description
1
2
3
4
5
6
7
8
9
3V3
EN
IO4
IO5
IO6
IO7
IO8
IO9
GND
18
17
16
15
14
13
12
11
10
IO0
IO1
IO2
IO3
IO19
IO18
TXD
RXD
IO10
Pin 19
GND
Keepout Zone
GND
GND GND GND
GND
GNDGNDGND
Figure 1: Pin Layout (Top View)
The module has 19 pins. See pin definitions in Table 2.
For peripheral pin configurations, please refer to ESP32-C3 Family Datasheet .
Table 2: Pin Definitions
Name No. Type Function
3V3 1 P Power supply
EN 2 I
High: on, enables the chip.
Low: off, the chip powers off.
Note: Do not leave the EN pin floating.
IO4 3 I/O/T GPIO4, MTMS, ADC1_CH4, FSPIHD
IO5 4 I/O/T GPIO5, MTDI, ADC2_CH0, FSPIWP
IO6 5 I/O/T GPIO6, MTCK, FSPICLK
IO7 6 I/O/T GPIO7, MTDO, FSPID
IO8 7 I/O/T GPIO8
IO9 8 I/O/T GPIO9
GND 9, 19 P Ground
IO10 10 I/O/T GPIO10, FSPICS0
RXD0 11 I/O/T U0RXD, GPIO20
Cont’d on next page
Espressif Systems 5 ESP32-C3-WROOM-02 User Manual v0.1