Wireless-tag Wt32-s2-wrover User manual

Wireless-Tag Technology Co., Ltd. V1.0.0

WT32-S2-WROVER Datasheet

V1.0.0

Sept 16, 2021

Wireless-Tag Technology Co., Ltd

Wireless-Tag Technology Co., Ltd. V1.0.0

About this document

This document provides users with the technical specifications for WT32-S2-WROVER.

Document updates

Please visit Wireless-Tag’s official website to download the latest version of the document.

Revision history

Please go to the document revision history page to view the revisions of the document.

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This document is provided “as is” with no warranties whatsoever, including any warranty of

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

their respective owners, and are hereby acknowledged.

Statement

Due to product version upgrade or other reasons, the contents of this manual may be changed. Wireless-Tag

Technology Co., Ltd reserves the right to modify the contents of this manual without any notice or prompt. This

manual is only used as a guide. Wireless-Tag Technology Co., Ltd makes every effort to provide accurate

information in this manual, but it does not guarantee that the contents of the manual are completely free of errors.

All statements, information and suggestions in this manual do not constitute any express or implied guarantee.

Wireless-Tag Technology Co., Ltd. V1.0.0

III

Revision History

No.

Version

Changes

Change (+/-) Descriptions

Author

Date

V1.0.0

First release

Fiona

Sept 16, 2021

*Changes：C――create, A——add, M——modify, D——delete

Wireless-Tag Technology Co., Ltd. V1.0.0

Contents

1 Module Overview.............................................................................................................................1

1.1 Features................................................................................................................................. 1

1.2 Description............................................................................................................................ 1

1.3 Applications ...................................................................................................................... 2

2 Block Diagram................................................................................................................................. 3

3 Pin Definitions................................................................................................................................. 4

3.1 Pin Layout............................................................................................................................. 4

3.2 Pin description...................................................................................................................... 4

3.3 Strapping Pins....................................................................................................................... 5

4 Electrical Characteristics..................................................................................................................7

4.1 Absolute Maximum Ratings................................................................................................. 7

4.2 Recommended Operating Conditions...................................................................................7

4.3 Current Consumption Characteristics...................................................................................7

5 Application Note.............................................................................................................................. 9

5.1 Module Dimensions.............................................................................................................. 9

5.2 Reflow Profile....................................................................................................................... 9

5.3 Peripheral Schematic.......................................................................................................... 10

6 Product Trial................................................................................................................................... 11

Wireless-Tag Technology Co., Ltd. V1.0.0

1 Module Overview

1.1 Features

MCU

ESP32-S2 chip embedded, 32-bit LX7 single-core microprocessor, up to 240MHz

■ SRAM 320KB

■ RTC SRAM 16KB

■ ROM 128KB

WIFI

IEEE 802.11b/g/n protocol

Data rate up to 150 Mbps

Frame aggregation (TX/RX A-MPDU, TX/RX A-MSDU)

0.4 µs guard interval

Center frequency range of operating channel: 2400~2483.5 MHz

Hardware

Module interface: GPIO, SPI, LCD interface, UART, I2C, I2S, Camera interface, IR, pulse

counter, LED PWM, TWAITM (compatible with ISO 11898-1), USB 1.1 OTG, ADC, DAC,

touch sensor, temperature sensor

40MHz crystal oscillator

4 MB SPI flash

8 MB PSRAM

Operating voltage/Power supply: 3.0~3.6 V

Operating ambient temperature: -40~85℃

Package size: (18 × 31 × 3.3) mm

1.2 Description

WT32-S2-WROVER is a universal Wi-Fi MCU module with powerful functions and rich

peripheral interfaces, which can be used in scenarios such as wearable electronic devices and

smart homes.

WT32-S2-WROVER adopts IPEX onboard antenna, equipped with 4 MB SPI flash and 8 MB SPI

PSRAM.

WT32-S2-WROVER uses ESP32-S2 chip. The ESP32-S2 chip is equipped with an Xtensa®

32-bit LX7 single-core processor with a working frequency of up to 240 MHz. The user can turn

Wireless-Tag Technology Co., Ltd. V1.0.0

off the power of the CPU and use the low-power coprocessor to monitor the status changes of

peripherals or whether certain analog quantities exceed the threshold. ESP32-S2 also integrates a

wealth of peripherals, including SPI, I2S, UART, I2C, LED PWM, TWAITM, LCD interface,

Camera interface, ADC, DAC, touch sensor, temperature sensor and up to 43 GPIOs, as well as a

full-speed USB 1.1 On-The-Go (OTG) interface.

1.3 Applications

Generic low-power IoT sensor hub

Generic low-power IoT data logger

Camera video streaming

OTT TV box/set-top box equipment

USB device

Voice recognition

Image recognition

Mesh network

Home automation

Smart home control panel

Smart buildings

Industrial Automation

Smart agriculture

Audio equipment

Health/Medical/Nursing

Wi-Fi toys

Wearable electronic products

Retail & Catering

Smart POS application

Smart door lock

Wireless-Tag Technology Co., Ltd. V1.0.0

2 Block Diagram

Figure 1 Block Diagram

Wireless-Tag Technology Co., Ltd. V1.0.0

3 Pin Definitions

3.1 Pin Layout

Figure 2 Pin Layout

3.2 Pin description

Table 1 Pin Definitions and Descriptions

Name

Description

GND

Ground

IO07

RTC_GPIO7, GPIO7, TOUCH7, ADC1_CH6

IO42

MTMS, GPIO42

IO45

GPIO45

IO46

GPIO46

GND

Ground

IO33

SPIIO4, GPIO33, FSPIHD

TXD

U0TXD, GPIO43, CLK_OUT1

RXD

U0RXD, GPIO44, CLK_OUT2

IO34

SPIIO5, GPIO34, FSPICS0

IO41

MTDI, GPIO41, CLK_OUT1

IO40

MTDO, GPIO40, CLK_OUT2

IO39

MTCK, GPIO39, CLK_OUT3

IO38

GPIO38, FSPIWP

IO37

SPIDQS, GPIO37, FSPIQ

VCC

Power supply

IO36

SPIIO7, GPIO36, FSPICLK

IO35

SPIIO6, GPIO35, FSPID

Wireless-Tag Technology Co., Ltd. V1.0.0

Name

Description

IO0

RTC_GPIO0, GPIO0

IO01

RTC_GPIO1, GPIO1, TOUCH1, ADC1_CH0

IO02

RTC_GPIO2, GPIO2, TOUCH2, ADC1_CH1

IO05

RTC_GPIO5, GPIO5, TOUCH5, ADC1_CH4

IO03

RTC_GPIO3, GPIO3, TOUCH3, ADC1_CH2

IO04

RTC_GPIO4, GPIO4, TOUCH4, ADC1_CH3

IO06

RTC_GPIO6, GPIO6, TOUCH6, ADC1_CH5

IO21

RTC_GPIO21, GPIO21

IO20

RTC_GPIO20, GPIO20, U1CTS, ADC2_CH9, CLK_OUT1, USB_D+

IO19

RTC_GPIO19, GPIO19, U1RTS, ADC2_CH8, CLK_OUT2, USB_D-

IO18

RTC_GPIO18, GPIO18, U1RXD, ADC2_CH7, DAC_2, CLK_OUT3

IO17

RTC_GPIO17, GPIO17, U1TXD, ADC2_CH6, DAC_1

IO16

RTC_GPIO16, GPIO16, U0CTS, ADC2_CH5, XTAL_32K_N

IO15

RTC_GPIO15, GPIO15, U0RTS, ADC2_CH4, XTAL_32K_P

IO14

RTC_GPIO14, GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS

IO13

RTC_GPIO13, GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7

IO12

RTC_GPIO12, GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6

Chip Enable pin:

High level: on, enables the chip.

Low level: off, the chip powers off, low current.

Note: Do not leave the EN pin floating.

IO11

RTC_GPIO11, GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5

IO10

RTC_GPIO10, GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4

IO09

RTC_GPIO9, GPIO9, TOUCH9, ADC1_CH8, FSPIHD

IO08

RTC_GPIO8, GPIO8, TOUCH8, ADC1_CH7

GND

Ground

3.3 Strapping Pins

ESP32-S2 series has three strapping pins.

GPIO0 = IO0

GPIO45 = IO45

GPIO46 = IO46

Software can read the strapping values of these pins in “GPIO_STRAPPING” register.

During the chip’s system reset(power-on-reset, RTC watchdog reset, brownout reset, analog super

watchdog reset, crystal clock glitch detection 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.

Wireless-Tag Technology Co., Ltd. V1.0.0

IO0, IO45, IO46 are connected to internal pull-up/pull-down by default. If these pins are not

connected externally or the connected external circuit is in a high impedance state, the internal

weak pull-up/pull-down will determine the default value of the input level of these pins.

To change the value of strapping, users can apply external pull-down/pull-up resistors, or use the

GPIO of the host MCU to control the strapping pin level of ESP32-S2 during power-on reset.

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

Refer to Table 2 for a detailed boot-mode configuration of the strapping pins.

Table 2 Strapping Pins

VDD_SPI voltage 1

Default

3.3 V

1.8 V

IO45 2

drop down

Booting Mode 1

Default

SPI Boot

Download Boot

IO0

pull up

IO46

Drop down

N/A

Enabling/Disabling ROM Code Print During Booting 3 4

Default

Print normally

No printing after

power-on

IO46

Drop down

See the description in

Article 4 for details

See the description in

Article 4 for details

Note:

1. The firmware can change the setting of "VDD_SPI voltage" after booting through the

configuration register.

2. GPIO 46 = 1 and GPIO0 = 0 cannot be used.

3. Since the operating voltage of the module's flash is 3.3 V by default (VDD_SPI output), the

internal IO45 pull-up resistor R1 of the module is not loaded by default. At the same time,

please pay attention to ensure that the external circuit will not pull IO45 high when the module

is powered on when using IO45.

4. The ROM Code power-on printing defaults to the TXD0 pin, which can be switched to the

DAC_1 (IO17) pin under the control of the eFuse bit.

5. The UART_PRINT_CONTROL of eFuse is:

When it is 0, it will print normally after power-on, and it is not controlled by IO46.

When 1, IO46 is 0: normal printing when power on; IO46 is 1: no printing when power on.

At 2 , IO46 is 0: no printing when power on; IO46 is 1: normal printing when power on.

At 3 , there is no printing after power on, and it is not controlled by IO46.

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