Data Sheet

6 Peripheral Schematics
6 Peripheral Schematics
This is the typical application circuit of the module connected with peripheral components (for example, power
supply, antenna, reset button, JTAG interface, and UART interface).
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
IO12 should be kept low when the module is powered on.
EN
TXD0
RXD0
IO0
IO13 IO15
IO14
IO23
IO22
IO21
IO19
IO18
IO5
IO4
IO2
SENSOR_VP
SENSOR_VN
IO34
IO35
IO32
IO33
IO25
IO26
IO27
IO17
IO16
ENIO14 TMS
IO12 TDI
IO13 TCK
IO15 TDO
IO12
GND
GND
GND
VDD33
GND
GND
VDD33
GND
GND
C1
22uF
C3
TBD
JP2
Boot Option
1
1
2
2
U1
ESP32-WROOM-32E/ESP32-WROOM-32UE
GND1
1
3V3
2
EN
3
SENSOR_VP
4
SENSOR_VN
5
IO34
6
IO35
7
IO32
8
IO33
9
IO25
10
IO26
11
IO27
12
IO14
13
IO12
14
GND3
38
IO23
37
IO22
36
TXD0
35
RXD0
34
IO21
33
NC
32
IO19
31
IO18
30
IO5
29
IO17
28
IO16
27
IO4
26
IO0
25
GND2
15
IO13
16
NC
17
NC
18
NC
19
NC
20
NC
21
NC
22
IO15
23
IO2
24
P_GND
39
C4 0.1uF
JP3
JTAG
1
1
2
2
3
3
4
4
SW1
R1
TBD
C2
0.1uF
R2 0R
JP1
UART
1
1
2
2
3
3
4
4
Figure 6: ESP32WROOM32E & ESP32WROOM32UE Peripheral Schematics
Note:
• Soldering Pad 39 to the Ground of the base board is not necessary for a satisfactory thermal performance. If users
do want to solder it, they need to ensure that the correct quantity of soldering paste is applied.
• To ensure the power supply to the ESP32 chip during power-up, it is advised to add an RC delay circuit at the EN pin.
The recommended setting for the RC delay circuit is usually R = 10 kΩ and C = 1 µF. However, specific parameters
should be adjusted based on the power-up timing of the module and the power-up and reset sequence timing
of the chip. For ESP32’s power-up and reset sequence timing diagram, please refer to Section Power Scheme in
ESP32 Datasheet.
Espressif Systems 24
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ESP32-WROOM-32E & ESP32-WROOM-32UE Datasheet v1.2