Data Sheet

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5. Schematics
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Figure 5-2. ESP-WROOM-02U Schematics!
5 5
4 4
3 3
2 2
1 1
D D C C B B A A
The values of C4, L1 and L2 vary with the actual PCB board.
The values of C1 and C2 vary with the selection of the crystal.
GPIO15
RST
SD_D1 SD_D0 SD_CLK SD_CMD SD_D3 SD_D2
SD_CLK SD_CMD SD_D2
UTXDA
WIFI_ANT
GPIO14
GPIO12
URXD
GPIO13
GPIO16
GPIO0
CH_PU
GPIO2
GPIO4
GPIO5
CH_PU GPIO14 GPIO12 GPIO13 GPIO15 GPIO2 GPIO0
GPIO4 GPIO5 URXD UTXD RST TOUT GPIO16
TOUT
SD_D3 SD_D0 SD_D1
UTXD
GND
GND
VDD33
GND
GNDGND
GND
GND
VDD33
GND
VDD33
GND
GND
GND
GND
VDD33
GND GND
GND
VDD33
GND
GND
GND
GND
Title Size
Document Number Rev
Date: Sheet of
<Doc>
ESP-WROOM-02U
A3
22Tuesday, February 26, 2019
Title Size
Document Number Rev
Date: Sheet of
<Doc>
ESP-WROOM-02U
A3
22Tuesday, February 26, 2019
Title Size
Document Number Rev
Date: Sheet of
<Doc>
ESP-WROOM-02U
A3
22Tuesday, February 26, 2019
C2 10pF
D1 LESD8D3.3CAT5G
J18 CON1
1
R1
12K±1%
J5 CON1
1
C7
0.1uF(NC)
C1
10pF
C3
0.1uF
L2 TBD
L3 4.3nH
J10 CON1
1
J13 CON1
1
C8
1uF(NC)
J4 CON1
1
J15 CON1
1
J9 CON1
1
U3 FLASH
/CS
1
DO
2
/WP
3
GND
4
DI
5
CLK
6
/HOLD
7
VCC
8
L1 TBD
R3 200R
J12 CON1
1
J3 CON1
1
J8 CON1
1
C6 1uF
J2 CON1
1
U1
26MHz±10ppm
XIN
1
GND
2
XOUT
3
GND
4
J11 CON1
1
CON1
IPEX
1
2
3
J7 CON1
1
J1 CON1
1
J14 CON1
1
U2
ESP8266EX
VDDA
1
LNA
2
VDD3P3
3
VDD3P3
4
VDD_RTC
5
TOUT
6
CHIP_EN
7
XPD_DCDC
8
MTMS
9
MTDI
10
VDDPST
11
MTCK
12
MTDO
13
GPIO2
14
GPIO0
15
GPIO4
16
VDDPST
17
SD_DATA_2
18
SD_DATA_3
19
SD_CMD
20
SD_CLK
21
SD_DATA_0
22
SD_DATA_1
23
GPIO5
24
U0RXD
25
U0TXD
26
XTAL_OUT
27
XTAL_IN
28
VDDD
29
VDDA
30
RES12K
31
EXT_RSTB
32
GND
33
C5
10uF
C4 TBD
J16 CON1
1
J6 CON1
1
R2 499R±1%
J17 CON1
1
Espressif
! /! 13 22
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2020.07