ESP32-WROOM-32E-N4全新原装原理图各脚功能电路原理芯片引脚定义-中国IC网-芯三七

产品型号ESP32-WROOM-32U的Datasheet PDF文件预览

ESP32-WROOM-32D &

ESP32-WROOM-32U

Datasheet

Version 1.8

Espressif Systems

www.espressif.com

About This Document

This document provides the specifications for the ESP32-WROOM-32D and ESP32-WROOM-32U modules.

Revision History

For revision history of this document, please refer to the last page.

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subscribe at www.espressif.com/en/subscribe.

Certification

Download certificates for Espressif products from www.espressif.com/en/certificates.

Disclaimer and Copyright Notice

Information in this document, including URL references, is subject to change without notice. THIS DOCUMENT IS

PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABIL-

ITY, NON-INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE

ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE.

All liability, including liability for infringement of any proprietary rights, relating to use of information in this docu-

ment is disclaimed. No licenses express or implied, by estoppel or otherwise, to any intellectual property rights

are granted herein. The Wi-Fi Alliance Member logo is a trademark of the Wi-Fi Alliance. The Bluetooth logo is a

registered trademark of Bluetooth SIG.

All trade names, trademarks and registered trademarks mentioned in this document are property of their respective

owners, and are hereby acknowledged.

Contents

1 Overview

2 Pin Definitions

2.1 Pin Layout

2.2 Pin Description

2.3 Strapping Pins

3 Functional Description

3.1 CPU and Internal Memory

3.2 External Flash and SRAM

3.3 Crystal Oscillators

3.4 RTC and Low-Power Management

4 Peripherals and Sensors

5 Electrical Characteristics

5.1 Absolute Maximum Ratings

5.2 Recommended Operating Conditions

5.3 DC Characteristics (3.3 V, 25 °C)

5.4 Wi-Fi Radio

5.5 BLE Radio

5.5.1 Receiver

5.5.2 Transmitter

5.6 Reflow Profile

6 Schematics

7 Peripheral Schematics

8 Physical Dimensions

9 Recommended PCB Land Pattern

10U.FL Connector Dimensions

11Learning Resources

11.1 Must-Read Documents

11.2 Must-Have Resources

Revision History

List of Tables

ESP32-WROOM-32D vs. ESP32-WROOM-32U

ESP32-WROOM-32D and ESP32-WROOM-32U Specifications

Pin Definitions

Strapping Pins

Absolute Maximum Ratings

Recommended Operating Conditions

DC Characteristics (3.3 V, 25 °C)

Wi-Fi Radio Characteristics

Receiver Characteristics – BLE

10 Transmitter Characteristics – BLE

List of Figures

ESP32-WROOM-32D Pin Layout (Top View)

Reflow Profile

ESP32-WROOM-32D Schematics

ESP32-WROOM-32U Schematics

ESP32-WROOM-32D & ESP32-WROOM-32U Peripheral Schematics

Physical Dimensions of ESP32-WROOM-32D

Physical Dimensions of ESP32-WROOM-32U

Recommended PCB Land Pattern of ESP32-WROOM-32D

Recommended PCB Land Pattern of ESP32-WROOM-32U

10 ESP32-WROOM-32U U.FL Dimensions

1. Overview

ESP32-WROOM-32D and ESP32-WROOM-32U are powerful, generic Wi-Fi+BT+BLE MCU modules that target

a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as

voice encoding, music streaming and MP3 decoding.

ESP32-WROOM-32U is different from ESP32-WROOM-32D in that ESP32-WROOM-32U integrates a U.FL con-

nector. For detailed information of the U.FL connector please see Chapter 10. Note that the information in this

data sheet is applicable to both modules. Any differences between them will be clearly specified in the course of

this document. Table 1 lists the difference between ESP32-WROOM-32D and ESP32-WROOM-32U.

Table 1: ESP32-WROOM-32D vs. ESP32-WROOM-32U

Module

Core

ESP32-WROOM-32D

ESP32-D0WD

32 Mbits, 3.3 V

40 MHz

ESP32-WROOM-32U

ESP32-D0WD

SPI flash

Crystal

32 Mbits, 3.3 V

40 MHz

U.FL connector (which needs to be connected

to an external IPEX antenna)

Antenna

onboard antenna

Dimensions

(Unit: mm)

Schematics

(18.00±0.10) × (25.50±0.10) × (3.10±0.10) (18.00±0.10) × (19.20±0.10) × (3.20±0.10)

(See Figure 6 for details)

See Figure 3 for details.

(See Figure 7 for details)

See Figure 4 for details.

At the core of the two modules is the ESP32-D0WD chip that belongs to the ESP32 series* of chips. The chip

embedded is designed to be scalable and adaptive. There are two CPU cores that can be individually controlled,

and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The user may also power off the CPU

and make use of the low-power co-processor to constantly monitor the peripherals for changes or crossing of

thresholds. ESP32 integrates a rich set of peripherals, ranging from capacitive touch sensors, Hall sensors, SD

card interface, Ethernet, high-speed SPI, UART, I²S and I²C.

Note:

* For details on the part numbers of the ESP32 family of chips, please refer to the document ESP32 Datasheet.

The integration of Bluetooth, Bluetooth LE and Wi-Fi ensures that a wide range of applications can be targeted,

and that the module is all-around: using Wi-Fi allows a large physical range and direct connection to the Internet

through a Wi-Fi router, while using Bluetooth allows the user to conveniently connect to the phone or broadcast

low energy beacons for its detection. The sleep current of the ESP32 chip is less than 5 µA, making it suitable

for battery powered and wearable electronics applications. The module supports a data rate of up to 150 Mbps,

and 20 dBm output power at the antenna to ensure the widest physical range. As such the module does offer

industry-leading specifications and the best performance for electronic integration, range, power consumption,

and connectivity.

The operating system chosen for ESP32 is freeRTOS with LwIP; TLS 1.2 with hardware acceleration is built in as

well. Secure (encrypted) over the air (OTA) upgrade is also supported, so that users can upgrade their products

even after their release, at minimum cost and effort.

Table 2 provides the specifications of ESP32-WROOM-32D and ESP32-WROOM-32U.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

1. Overview

Table 2: ESP32-WROOM-32D and ESP32-WROOM-32U Specifications

Categories

Certification

Items

Specifications

RF Certification

Wi-Fi Certification

Bluetooth certification

Green Certification

Reliablity

FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC

Wi-Fi Alliance

BQB

REACH/RoHS

Test

HTOL/HTSL/uHAST/TCT/ESD

802.11 b/g/n (802.11n up to 150 Mbps)

A-MPDU and A-MSDU aggregation and 0.4 µs guard

interval support

Protocols

Wi-Fi

Frequency range

Protocols

2.4 GHz ~ 2.5 GHz

Bluetooth v4.2 BR/EDR and BLE specification

NZIF receiver with –97 dBm sensitivity

Class-1, class-2 and class-3 transmitter

AFH

Bluetooth

Radio

Audio

CVSD and SBC

SD card, UART, SPI, SDIO, I²C, LED PWM, Motor

PWM, I²S, IR, pulse counter, GPIO, capacitive touch

sensor, ADC, DAC

Module interfaces

On-chip sensor

Hall sensor

Integrated crystal

40 MHz crystal

Integrated SPI flash ¹

Operating voltage/Power supply

Operating current

4 MB

Hardware

2.7 V ~ 3.6 V

Average: 80 mA

Minimum current delivered by power

supply

500 mA

Recommended operating temperature

range ²

–40 °C ~ +85 °C

Notice:

1. ESP32-WROOM-32D and ESP32-WROOM-32U with 8 MB flash or 16 MB flash are available for custom order.

2. ESP32-WROOM-32D and ESP32-WROOM-32U with high temperature range (–40 °C ~ +105 °C) option are avail-

able for custom order. 4 MB SPI flash is supported on the high temperature range version.

3. For detailed ordering information, please see Espressif Product Ordering Information.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

2. Pin Deﬁnitions

2. Pin Definitions

2.1 Pin Layout

Keepout Zone

GND

IO23

IO22

TXD0

RXD0

IO21

3V3

SENSOR_VP

SENSOR_VN

IO34

39 GND

IO35

IO32

IO19

IO18

IO5

IO33

IO25

IO26

IO17

IO16

IO4

IO27

IO14

IO12

IO0

Figure 1: ESP32-WROOM-32D Pin Layout (Top View)

Note:

The pin layout of ESP32-WROOM-32U is the same as that of ESP32-WROOM-32D, except that ESP32-WROOM-32U

has no keepout zone.

2.2 Pin Description

The ESP32-WROOM-32D and ESP32-WROOM-32U have 38 pins. See pin definitions in Table 3.

Table 3: Pin Definitions

Name

No.

Type

Function

GND

Ground

3V3

Power supply

Module-enable signal. Active high.

GPIO36, ADC1_CH0, RTC_GPIO0

GPIO39, ADC1_CH3, RTC_GPIO3

GPIO34, ADC1_CH6, RTC_GPIO4

GPIO35, ADC1_CH7, RTC_GPIO5

SENSOR_VP

SENSOR_VN

IO34

IO35

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

2. Pin Deﬁnitions

Name

IO32

No.

Type

I/O

Function

GPIO32, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4,

TOUCH9, RTC_GPIO9

GPIO33, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5,

TOUCH8, RTC_GPIO8

IO33

I/O

IO25

IO26

IO27

I/O

GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0

GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1

GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV

GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK,

SD_CLK, EMAC_TXD2

IO14

I/O

GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2,

SD_DATA2, EMAC_TXD3

IO12

GND

IO13

I/O

Ground

GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3,

SD_DATA3, EMAC_RX_ER

I/O

SHD/SD2*

SWP/SD3*

SCS/CMD*

SCK/CLK*

SDO/SD0*

SDI/SD1*

I/O

GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD

GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD

GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS

GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS

GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS

GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS

GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD,

SD_CMD, EMAC_RXD3

IO15

I/O

GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0,

SD_DATA0

IO2

IO0

IO4

I/O

GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1, EMAC_TX_CLK

GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1,

SD_DATA1, EMAC_TX_ER

IO16

IO17

IO5

I/O

GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT

GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180

GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK

GPIO18, VSPICLK, HS1_DATA7

IO18

IO19

GPIO19, VSPIQ, U0CTS, EMAC_TXD0

IO21

RXD0

TXD0

IO22

IO23

GND

I/O

GPIO21, VSPIHD, EMAC_TX_EN

GPIO3, U0RXD, CLK_OUT2

GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2

GPIO22, VSPIWP, U0RTS, EMAC_TXD1

GPIO23, VSPID, HS1_STROBE

Ground

Notice:

* Pins SCK/CLK, SDO/SD0, SDI/SD1, SHD/SD2, SWP/SD3 and SCS/CMD, namely, GPIO6 to GPIO11 are connected

to the integrated SPI flash integrated on the module and are not recommended for other uses.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

2. Pin Deﬁnitions

2.3 Strapping Pins

ESP32 has five strapping pins, which can be seen in Chapter 6 Schematics:

• MTDI

• GPIO0

• GPIO2

• MTDO

• GPIO5

Software can read the values of these five bits from register ”GPIO_STRAPPING”.

During the chip’s system reset release (power-on-reset, RTC watchdog reset and brownout reset), the latches

of the strapping pins sample the voltage level as strapping bits of ”0” or ”1”, and hold these bits until the chip

is powered down or shut down. The strapping bits configure the device’s boot mode, the operating voltage of

VDD_SDIO and other initial system settings.

Each strapping pin is connected to its internal pull-up/pull-down during the chip reset. Consequently, if a strapping

pin is unconnected or the connected external circuit is high-impedance, the internal weak pull-up/pull-down will

determine the default input level of the strapping pins.

To change the strapping bit values, users can apply the external pull-down/pull-up resistances, or use the host

MCU’s GPIOs to control the voltage level of these pins when powering on ESP32.

After reset release, the strapping pins work as normal-function pins.

Refer to Table 4 for a detailed boot-mode configuration by strapping pins.

Table 4: Strapping Pins

Voltage of Internal LDO (VDD_SDIO)

Default

3.3 V

1.8 V

MTDI

Pull-down

Booting Mode

Default

SPI Boot

Download Boot

GPIO0 Pull-up

GPIO2 Pull-down

Don’t-care

Enabling/Disabling Debugging Log Print over U0TXD During Booting

Default

U0TXD Active

U0TXD Silent

MTDO Pull-up

Timing of SDIO Slave

Falling-edge Sampling Falling-edge Sampling Rising-edge Sampling Rising-edge Sampling

Default

Falling-edge Output

Rising-edge Output

Falling-edge Output

Rising-edge Output

MTDO Pull-up

GPIO5 Pull-up

Note:

• Firmware can configure register bits to change the settings of ”Voltage of Internal LDO (VDD_SDIO)” and ”Timing

of SDIO Slave” after booting.

• Both ESP32-WROOM-32D and ESP32-WROOM-32U integrate a 3.3 V SPI flash, so the pin MTDI cannot be set

to 1 when the modules are powered up.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

3. Functional Description

This chapter describes the modules and functions integrated in ESP32-WROOM-32D and ESP32-WROOM-

32U.

3.1 CPU and Internal Memory

ESP32-D0WD contains a dual-core Xtensa^®32-bit LX6 MCU. The internal memory includes:

• 448 KB of ROM for booting and core functions.

• 520 KB of on-chip SRAM for data and instructions.

• 8 KB of SRAM in RTC, which is called RTC FAST Memory and can be used for data storage; it is accessed

by the main CPU during RTC Boot from the Deep-sleep mode.

• 8 KB of SRAM in RTC, which is called RTC SLOW Memory and can be accessed by the co-processor during

the Deep-sleep mode.

• 1 Kbit of eFuse: 256 bits are used for the system (MAC address and chip configuration) and the remaining

768 bits are reserved for customer applications, including flash-encryption and chip-ID.

3.2 External Flash and SRAM

ESP32 supports multiple external QSPI flash and SRAM chips. More details can be found in Chapter SPI in the

ESP32 Technical Reference Manual. ESP32 also supports hardware encryption/decryption based on AES to pro-

tect developers’ programs and data in flash.

ESP32 can access the external QSPI flash and SRAM through high-speed caches.

• The external flash can be mapped into CPU instruction memory space and read-only memory space simul-

taneously.

– When external flash is mapped into CPU instruction memory space, up to 11 MB + 248 KB can be

mapped at a time. Note that if more than 3 MB + 248 KB are mapped, cache performance will be

reduced due to speculative reads by the CPU.

– When external flash is mapped into read-only data memory space, up to 4 MB can be mapped at a

time. 8-bit, 16-bit and 32-bit reads are supported.

• External SRAM can be mapped into CPU data memory space. Up to 4 MB can be mapped at a time. 8-bit,

16-bit and 32-bit reads and writes are supported.

Both ESP32-WROOM-32D and ESP32-WROOM-32U integrate a 4 MB of external SPI flash. The integrated SPI

flash is connected to GPIO6, GPIO7, GPIO8, GPIO9, GPIO10 and GPIO11. These six pins cannot be used as

regular GPIOs.

3.3 Crystal Oscillators

The module uses a 40-MHz crystal oscillator.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

3. Functional Description

3.4 RTC and Low-Power Management

With the use of advanced power-management technologies, ESP32 can switch between different power modes.

For details on ESP32’s power consumption in different power modes, please refer to section ”RTC and Low-Power

Management” in ESP32 Datasheet.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

4. Peripherals and Sensors

Please refer to Section Peripherals and Sensors in ESP32 Datasheet.

Note:

External connections can be made to any GPIO except for GPIOs in the range 6-11. These six GPIOs are connected to

the module’s integrated SPI flash. For details, please see Section 6 Schematics.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

5. Electrical Characteristics

5.1 Absolute Maximum Ratings

Stresses beyond the absolute maximum ratings listed in Table 5 below may cause permanent damage to the

device. These are stress ratings only, and do not refer to the functional operation of the device that should follow

the recommended operating conditions.

Table 5: Absolute Maximum Ratings

Symbol

VDD33

Parameter

Min

–0.3

Max

3.6

Unit

Power supply voltage

Cumulative IO output current

Storage temperature

I_output

1,100

150

°C

T_store

–40

1. The module worked properly after a 24-hour test in ambient temperature at 25 °C, and the IOs in three domains

(VDD3P3_RTC, VDD3P3_CPU, VDD_SDIO) output high logic level to ground. Please note that pins occupied by flash

and/or PSRAM in the VDD_SDIO power domain were excluded from the test.

2. Please see Appendix IO_MUX of ESP32 Datasheet for IO’s power domain.

5.2 Recommended Operating Conditions

Table 6: Recommended Operating Conditions

Symbol

VDD33

I_{V DD}

Parameter

Min

2.7

0.5

–40

Typical

Max

3.6

Unit

Power supply voltage

3.3

Current delivered by external power supply

Operating temperature

°C

5.3 DC Characteristics (3.3 V, 25 °C)

Table 7: DC Characteristics (3.3 V, 25 °C)

Symbol

C_IN

V_IH

V_IL

Parameter

Min

0.75×VDD¹

Typ Max

Unit

Pin capacitance

High-level input voltage

Low-level input voltage

High-level input current

Low-level input current

High-level output voltage

Low-level output voltage

High-level source current

VDD¹+0.3

–0.3

0.25×VDD¹

I_IH

I_IL

V_OH

V_OL

0.8×VDD¹

0.1×VDD¹

VDD3P3_CPU power domain ^{1, 2}

(VDD¹= 3.3 V, V_OH>= 2.64 V, VDD3P3_RTC power domain ^{1, 2}

I_OH

output drive strength set to the

VDD_SDIO power domain ^{1, 3}

maximum)

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

5. Electrical Characteristics

Symbol

Parameter

Min

Typ Max

Unit

Low-level sink current

(VDD¹= 3.3 V, V_OL= 0.495 V,

I_OL

output drive strength set to the maximum)

Resistance of internal pull-up resistor

Resistance of internal pull-down resistor

R_{P U}

R_{P D}

kΩ

V_{IL_nRST}Low-level input voltage of CHIP_PU to power off the chip

0.6

Notes:

1. Please see Appendix IO_MUX of ESP32 Datasheet for IO’s power domain. VDD is the I/O voltage for a particular power

domain of pins.

2. For VDD3P3_CPU and VDD3P3_RTC power domain, per-pin current sourced in the same domain is gradually reduced

from around 40 mA to around 29 mA, V_OH>=2.64 V, as the number of current-source pins increases.

3. Pins occupied by flash and/or PSRAM in the VDD_SDIO power domain were excluded from the test.

5.4 Wi-Fi Radio

Table 8: Wi-Fi Radio Characteristics

Parameter

Condition

Min

Typical

Max

Unit

MHz

Ω

Input frequency

Output impedance*

TX power

2412

2484

11n, MCS7

dBm

11b mode

17.5

18.5

–98

–89

–92

–74

–91

–71

–89

–69

Sensitivity

11b, 1 Mbps

11b, 11 Mbps

11g, 6 Mbps

11g, 54 Mbps

11n, HT20, MCS0

11n, HT20, MCS7

11n, HT40, MCS0

11n, HT40, MCS7

11g, 6 Mbps

11g, 54 Mbps

11n, HT20, MCS0

11n, HT20, MCS7

Adjacent channel rejection

^∗For the modules that use IPEX antennas, the output impedance is 50 Ω. For other modules without IPEX antennas, users do

not need to concern about the output impedance.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

5. Electrical Characteristics

5.5 BLE Radio

5.5.1 Receiver

Table 9: Receiver Characteristics – BLE

Parameter

Conditions

Min

Typ

–97

Max

Unit

dBm

Sensitivity @30.8% PER

Maximum received signal @30.8% PER

Co-channel C/I

+10

–5

–25

–35

–25

–45

F = F0 + 1 MHz

F = F0 – 1 MHz

F = F0 + 2 MHz

F = F0 – 2 MHz

F = F0 + 3 MHz

F = F0 – 3 MHz

30 MHz ~ 2000 MHz

Adjacent channel selectivity C/I

–10

dBm

2000 MHz ~ 2400 MHz –27

2500 MHz ~ 3000 MHz –27

3000 MHz ~ 12.5 GHz –10

Out-of-band blocking performance

Intermodulation

–36

5.5.2 Transmitter

Table 10: Transmitter Characteristics – BLE

Parameter

Conditions

Min

Typ

Max

Unit

RF transmit power

Gain control step

RF power control range

dBm

kHz

–12

F = F0 ± 2 MHz

–52

–58

–60

Adjacent channel transmit power

F = F0 ± 3 MHz

F = F0 ± > 3 MHz

∆ f1

∆ f2

ICFT

265

avg

247

max

/∆ f1

avg

–0.92

–10

0.7

avg

kHz

Drift rate

Drift

kHz/50 µs

kHz

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

5. Electrical Characteristics

5.6 Reflow Profile

Peak Temp.

235 ~ 250℃

250

Preheating zone

150 ~ 200℃ 60 ~ 120s

Reﬂow zone

!217℃ 60 ~ 90s

Cooling zone

-1 ~ -5℃/s

217

200

Soldering time

> 30s

Ramp-up zone

1 ~ 3℃/s

100

Time (sec.)

100

150

200

250

Ramp-up zone — Temp.: <150℃ Time: 60 ~ 90s Ramp-up rate: 1 ~ 3℃/s

Preheating zone — Temp.: 150 ~ 200℃ Time: 60 ~ 120s Ramp-up rate: 0.3 ~ 0.8℃/s

Reﬂow zone — Temp.: >217℃ 7LPHꢀꢁ60 ~ 90s; Peak Temp.: 235 ~ 250℃ (<245℃ recommended) Time: 30 ~ 70s

Cooling zone — Peak Temp. ~ 180℃ Ramp-down rate: -1 ~ -5℃/s

Solder — Sn&Ag&Cu Lead-free solder (SAC305)

Figure 2: Reflow Profile

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

6. Schematics

Pin.1

GND

Pin.15

GND

Pin.38

GND

The values of C1 and C2 vary with

the selection of the crystal.

Pin.2

3V3

Pin.16

IO13

Pin.37

IO23

LESD8D3.3CAT5G

GND

VDD33

GPIO13

GPIO23

GPIO22

U0TXD

U0RXD

GPIO21

Pin.3

CHIP_PU/EN

Pin.17

SD2

Pin.36

IO22

GND

CHIP_PU

SHD/SD2

SWP/SD3

SCS/CMD

SCK/CLK

SDO/SD0

SDI/SD1

GPIO15

22pF/6.3V(10%)

Pin.4

SENSOR_VP

Pin.18

SD3

Pin.35

U0TXD

22pF/6.3V(10%)

VDD33

SENSOR_VP

GND

100pF

C20

1uF

GND

40MHz+/-10ppm

Pin.5

SENSOR_VN

Pin.19

CMD

Pin.34

U0RXD

3.3nF/6.3V(10%)

20K(5%)

SENSOR_VN

GPIO21

U0TXD

U0RXD

GPIO22

GND

10nF/6.3V(10%)

499R

0.1uF

Pin.6

IO34

Pin.20

CLK

Pin.33

IO21

GND

GPIO34

GPIO35

GPIO32

GPIO33

GPIO25

GPIO26

GPIO27

GPIO14

GPIO12

GND

2.0nH

GND

Pin.7

IO35

Pin.21

SD0

Pin.32

C11

1uF

C12

C13

10uF

C10

0.1uF

C21

VDD33

0.1uF

VDD_SDIO

GND

ANT1

GPIO19

Pin.8

IO32

Pin.22

SD1

Pin.31

IO19

VDDA

LNA_IN

VDD3P3

SENSOR_VP

SENSOR_CAPP

SENSOR_CAPN

SENSOR_VN

CHIP_PU

VDET_1

GPIO19

VDD3P3_CPU

GPIO23

TBD

GPIO23

GPIO18

GPIO5

SDI/SD1

SDO/SD0

SCK/CLK

SCS/CMD

SWP/SD3

SHD/SD2

GPIO17

C15

TBD

C14

TBD

SCS/CMD

SCK/CLK

SHD/SD2

SDI/SD1

SDO/SD0

SWP/SD3

GPIO19

GPIO18

GPIO5

GPIO18

GPIO5

/CS

SENSOR_VP

C16

PCB ANT

SD_DATA_1

SD_DATA_0

SD_CLK

SD_CMD

SD_DATA_3

SD_DATA_2

GPIO17

CLK

Pin.9

IO33

Pin.23

IO15

Pin.30

IO18

SENSOR_VN

CHIP_PU

/HOLD

FLASH

/WP

C17

GPIO34

GPIO35

GPIO32

GPIO33

GPIO25

GND

VDET_2

32K_XP

32K_XN

GPIO25

Pin.10

IO25

Pin.24

IO2

Pin.29

IO5

The values of C14

vary with the actual PCB board.

、 L4 and C15

VDD_SDIO

GPIO16

GND

GPIO2

VDD_SDIO

VDD33

C18

1uF

Pin.11

IO26

Pin.28

IO17

ESP32-D0WD

GND

GPIO17

GPIO16

GPIO4

Pin.12

IO27

Pin.27

IO16

C19

0.1uF

GND

Pin.13

IO14

Pin.26

IO4

Pin.14

IO12

Pin.39

GND

Pin.25

IO0

GPIO0

GND

Figure 3: ESP32-WROOM-32D Schematics

Pin.1

GND

Pin.15

GND

Pin.38

GND

The values of C1 and C2 vary with

the selection of the crystal.

Pin.2

3V3

Pin.16

IO13

Pin.37

IO23

LESD8D3.3CAT5G

GND

VDD33

GPIO13

GPIO23

GPIO22

U0TXD

U0RXD

GPIO21

Pin.3

CHIP_PU/EN

Pin.17

SD2

Pin.36

IO22

GND

CHIP_PU

SHD/SD2

SWP/SD3

SCS/CMD

SCK/CLK

SDO/SD0

SDI/SD1

GPIO15

22pF/6.3V(10%)

Pin.4

SENSOR_VP

Pin.18

SD3

Pin.35

U0TXD

22pF/6.3V(10%)

VDD33

SENSOR_VP

GND

100pF

C20

1uF

GND

40MHz+/-10ppm

Pin.5

SENSOR_VN

Pin.19

CMD

Pin.34

U0RXD

3.3nF/6.3V(10%)

20K(5%)

SENSOR_VN

GPIO21

U0TXD

U0RXD

GPIO22

GND

10nF/6.3V(10%)

499R

0.1uF

Pin.6

IO34

Pin.20

CLK

Pin.33

IO21

GND

GPIO34

GPIO35

GPIO32

GPIO33

GPIO25

GPIO26

GPIO27

GPIO14

GPIO12

GND

2.0nH

GND

Pin.7

IO35

Pin.21

SD0

Pin.32

C11

1uF

C12

C13

10uF

C10

0.1uF

C21

VDD33

0.1uF

VDD_SDIO

GND

J39

GND

TBD

GND

IPEX

GPIO19

Pin.8

IO32

Pin.22

SD1

Pin.31

IO19

VDDA

LNA_IN

VDD3P3

SENSOR_VP

SENSOR_CAPP

SENSOR_CAPN

SENSOR_VN

CHIP_PU

VDET_1

GPIO19

VDD3P3_CPU

GPIO23

GPIO18

GPIO5

SDI/SD1

SDO/SD0

SCK/CLK

SCS/CMD

SWP/SD3

SHD/SD2

GPIO17

C15

TBD

C14

TBD

SCS/CMD

SCK/CLK

SHD/SD2

SDI/SD1

SDO/SD0

SWP/SD3

GPIO19

GPIO18

GPIO5

GPIO18

GPIO5

/CS

SENSOR_VP

C16

SD_DATA_1

SD_DATA_0

SD_CLK

SD_CMD

SD_DATA_3

SD_DATA_2

GPIO17

CLK

Pin.9

IO33

Pin.23

IO15

Pin.30

IO18

SENSOR_VN

CHIP_PU

/HOLD

FLASH

/WP

C17

GPIO34

GPIO35

GPIO32

GPIO33

GPIO25

GND

VDET_2

32K_XP

32K_XN

GPIO25

Pin.10

IO25

Pin.24

IO2

Pin.29

IO5

The values of C14

vary with the actual PCB board.

、 L4 and C15

VDD_SDIO

GPIO16

GND

GPIO2

VDD_SDIO

VDD33

C18

1uF

Pin.11

IO26

Pin.28

IO17

ESP32-D0WD

GND

GPIO17

GPIO16

GPIO4

Pin.12

IO27

Pin.27

IO16

C19

0.1uF

GND

Pin.13

IO14

Pin.26

IO4

Pin.14

IO12

Pin.39

GND

Pin.25

IO0

GPIO0

GND

Figure 4: ESP32-WROOM-32U Schematics

7. Peripheral Schematics

VDD33VDD33

C1 10uF

C2 0.1uF

GND

UART DOWNLOAD

GND

10K

P_GND

GND3

IO23

IO22

TXD0

RXD0

IO21

IO19

IO18

IO5

IO17

IO16

IO4

GND1

3V3

SENSOR_VP

SENSOR_VN

IO34

IO35

IO32

IO33

IO25

IO23

0.1uF EN

IO22

TXD

RXD

IO21

GND

SENSOR_VP

SENSOR_VN

IO34

IO35

IO32

IO33

IO25

IO26

IO27

GND

IO19

IO18

IO5

IO17

IO16

IO4

IO26

IO27

IO14

IO12

IO0

GND

IO0

BOOT OPTION

GND

R2 100R MTMS

R3 100R MTDI

R4 100R MTCK

R5 100R MTDO

MTMS

MTDI

MTCK

MTDO

JTAG

MTDI should be kept at a low electric level when powering up the module.

Figure 5: ESP32-WROOM-32D & ESP32-WROOM-32U Peripheral Schematics

Note:

• Soldering Pad 39 to the Ground 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.

• When ESP32 is powered on and off repeatedly by switching the power rails, and there is a large capacitor on the 3V3 rail, a discharge circuit can be added to the 3V3 rail to ensure

proper power-on-reset. Please find the discharge circuit in Chapter Peripheral Schematics, in ESP32-WROOM-32 Datasheet.

• When battery is used as the power supply for ESP32 series of chips and modules, a supply voltage supervisor is recommended to avoid boot failure due to low voltage. Users are rec-

ommended to pull CHIP_PU low if the power supply for ESP32 is below 2.3 V. For the reset circuit, please refer to Chapter Peripheral Schematics, in ESP32-WROOM-32 Datasheet.

8. Physical Dimensions

ESP32-WROOM-32D DIMENSIONS

Unit: mm

Module Width

18.00±0.10

3.10±0.10

18.00±0.10

Module Thickness

0.80±0.10

Antenna Area

6.20±0.10

0.85±0.10

PCB Thickness

0.45±0.10

0.90±0.10

3.60±0.10

25.50±0.10

3.60±0.10

17.60±0.10

16.51±0.10

Module Length

5.70±0.10

8.50±0.10

∅

0.50±0.10

1.27±0.10

1.50±0.10

1.27±0.10

1.50±0.10

15.80±0.10

1.27±0.10

3.28±0.10

11.43±0.10

Side View

Top View

Bottom View

Figure 6: Physical Dimensions of ESP32-WROOM-32D

ESP32-WROOM-32U DIMENSIONS

Unit: mm

Module Width

3.20±0.10

18.00±0.10

Module Thickness

3.25±0.10

0.45±0.10

18.00±0.10

0.90±0.10

0.85±0.10

0.80±0.10

3.00±0.10

PCB Thickness

0.90±0.10

10.75±0.10

13.05±0.10

3.60±0.10

19.20±0.10

3.60±0.10

16.51±0.10

19.20±0.10

Module Length

17.50±0.10

5.70±0.10

8.50±0.10

15.65±0.10

1.27±0.10

1.50±0.10

1.27±0.10

11.43±0.10

1.50±0.10

3.28±0.10

11.43±0.10

Bottom View

Side View

Top View

Figure 7: Physical Dimensions of ESP32-WROOM-32U

9. Recommended PCB Land Pattern

Unit:mm

2.785

1.27x9=11.43

2.785

Figure 8: Recommended PCB Land Pattern of ESP32-WROOM-32D

Unit:mm

2.785

1.27x9=11.43

2.785

Figure 9: Recommended PCB Land Pattern of ESP32-WROOM-32U

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

10. U.FL Connector Dimensions

Unit: mm

Figure 10: ESP32-WROOM-32U U.FL Dimensions

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

11. Learning Resources

11.1 Must-Read Documents

The following link provides documents related to ESP32.

• ESP32 Datasheet

This document provides an introduction to the specifications of the ESP32 hardware, including overview, pin

definitions, functional description, peripheral interface, electrical characteristics, etc.

• ESP-IDF Programming Guide

It hosts extensive documentation for ESP-IDF ranging from hardware guides to API reference.

• ESP32 Technical Reference Manual

The manual provides detailed information on how to use the ESP32 memory and peripherals.

• ESP32 Hardware Resources

The zip files include the schematics, PCB layout, Gerber and BOM list of ESP32 modules and development

boards.

• ESP32 Hardware Design Guidelines

The guidelines outline recommended design practices when developing standalone or add-on systems

based on the ESP32 series of products, including the ESP32 chip, the ESP32 modules and development

boards.

• ESP32 AT Instruction Set and Examples

This document introduces the ESP32 AT commands, explains how to use them, and provides examples of

several common AT commands.

• Espressif Products Ordering Information

11.2 Must-Have Resources

Here are the ESP32-related must-have resources.

• ESP32 BBS

This is an Engineer-to-Engineer (E2E) Community for ESP32 where you can post questions, share knowledge,

explore ideas, and help solve problems with fellow engineers.

• ESP32 GitHub

ESP32 development projects are freely distributed under Espressif’s MIT license on GitHub. It is established

to help developers get started with ESP32 and foster innovation and the growth of general knowledge about

the hardware and software surrounding ESP32 devices.

• ESP32 Tools

This is a webpage where users can download ESP32 Flash Download Tools and the zip file ”ESP32 Certifi-

cation and Test”.

• ESP-IDF

This webpage links users to the official IoT development framework for ESP32.

• ESP32 Resources

This webpage provides the links to all available ESP32 documents, SDK and tools. ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

Revision History

Date

Version

V1.8

Release notes

2019.01

Changed the RF power control range in Table 10 from –12 ~ +12 to –12 ~ +9 dBm.

Added notice on module custom options under Table 2;

Added ”Cumulative IO output current” entry to Table 5: Absolute Maximum Ratings;

Added more parameters to Table 7: DC Characteristics.

Updated the hole diameter in the shield from 1.00 mm to 0.50 mm, in Figure 6.

• Added certifications and reliability test items the module has passed in Table 2:

ESP32-WROOM-32D and ESP32-WROOM-32U Specifications, and removed

software-specific information;

2018.10

2018.09

V1.7

V1.6

2018.08

V1.5

• Updated section 3.4: RTC and Low-Power Management;

• Changed the modules’ dimensions;

• Updated Figure 8 and 7: Physical Dimensions;

• Updated Table 8: Wi-Fi Radio.

• Deleted Temperature Sensor in Table 2: ESP32-WROOM-32D & ESP32-

WROOM-32U Specifications;

• Updated Chapter 3: Functional Description;

• Added notes to Chapter 7: Peripheral Schematics;

• Added Chapter 9: Recommended PCB Land Pattern;

Changes to electrical characteristics:

2018.06

V1.4

• Updated Table 5: Absolute Maximum Ratings;

• Added Table 6: Recommended Operating Conditions;

• Added Table 7: DC Characteristics;

• Updated the values of ”Gain control step”, ”Adjacent channel transmit power”

in Table 10: Transmitter Characteristics - BLE.

Updated Figure 4 ESP32-WROOM-32U Schematics and Figure 3 ESP32-WROOM-

32D Schematics.

2018.04

2018.02

V1.3

V1.2

Update Figure 4 ESP32-WROOM-32U Schematics.

Updated Chapter 6 Schematics.

Deleted description of low-noise amplifier.

2018.02

2017.11

V1.1

V1.0

Replaced the module name ESP-WROOM-32D with ESP32-WROOM-32D.

Added information about module certification in Table 2.

Updated the description of eFuse bits in Section 3.1.

First release.

Espressif Systems

ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8

型号:	ESP400/3,6
生命周期：	Active
IHS 制造商：	BLOCK TRANSFORMATOREN-ELEKTRONIK GMBH
Reach Compliance Code：	compliant
风险等级：	5.61
变压器类型：	AUTO TRANSFORMER
Base Number Matches：	1

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