Datasheet

3 Pin Definitions
3 Pin Definitions
3.1 Pin Layout
The pin diagram below shows the approximate location of pins on the module. For the actual diagram drawn to
scale, please refer to Figure 7.1 Physical Dimensions.
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 3: Pin Layout (Top View)
3.2 Pin Description
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
1
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, ADC1_CH4, FSPIHD, MTMS
IO5 4 I/O/T GPIO5, ADC2_CH0, FSPIWP, MTDI
IO6 5 I/O/T GPIO6, FSPICLK, MTCK
Cont’d on next page
Espressif Systems 11
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ESP32-C3-WROOM-02 & WROOM-02U Datasheet v0.7