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
NC: No component.
X1: ESR = Max. 70 KΩ
IO12 should be kept low when the module is powered on.
ESP32-PICO-MINI-02
ESP32-PICO-MINI-02U
EN
IO25
IO22
RXD0
TXD0
IO32 IO33 IO26 IO2 IO15 IO13 IO12 IO27 IO14
I36
TDIIO12
TCKIO13
TDOIO15
TMSIO14
IO21
IO19
IO5
IO8
IO7
IO20
I37
I38
I39
I34
I35
IO0 IO4
EN
GND
VDD33
GND
GND
VDD33
GND
GND
GND
GND
GND
GND
SW1
X1
32.768kHz(NC)
12
R2 0
C3
TBD
R5 NC
JP1
UART
1
1
2
2
3
3
4
4
C2
0.1uF
R3 0(NC)
R1
TBD
C6 12pF(NC)
C5 12pF(NC)
JP3
JTAG
1
1
2
2
3
3
4
4
R4 0(NC)
C4 0.1uF
JP2
Boot Option
1
1
2
2
U1
GND
1
3V3
3
IO0
23
I36
4
I37
5
I38
6
I39
7
I34
9
I35
10
IO25
15
IO26
16
IO27
17
IO14
18
IO12
19
NC
32
TXD0
31
RXD0
30
IO22
34
IO19
33
IO20
26
IO5
29
IO8
28
IO7
27
IO15
21
IO2
22
IO32
12
IO33
13
GND
52
IO13
20
IO21
35
IO4
24
EPAD
49
GND
2
GND
53
GND
51
GND
50
EN
8
GND
36
GND
37
GND
38
GND
39
GND
40
GND
41
GND
42
GND
43
GND
44
GND
45
GND
46
GND
47
GND
48
GND
14
GND
11
NC
25
C1
22uF
Figure 7: Peripheral Schematics
Note:
• Soldering Pad 49 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 that the power supply to the ESP32 chip is stable 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 Series Datasheet.
Espressif Systems 23
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ESP32-PICO-MINI-02 & PICO-MINI-02U Datasheet v1.0