Data Sheet
Table Of Contents
- This document provides users with the technical specifications for WT32C3-S6.
- Please visit Wireless-Tag’s official website to download the latest version of the document.
- Please go to the document revision history page to view the revisions of the document.
- Disclaimer and copyright notice
- Information in this paper, including URL references, is subject to change without prior notice.
- This document is provided “as is” with no warranties whatsoever, including any warranty of merchantability, non-infringement, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, specification or sample. All liabi...
- All trade names, trademarks and registered trademarks mentioned in this document are property of their respective owners, and are hereby acknowledged.
- Copyright © 2020 Wireless-Tag Technology Co., Ltd. All rights reserved.
- Statement
- 1 Overview
- WT32C3-S6 WiFi module is a low-power, cost-effective embedded wireless network control module, which is an ideal choice for smart grid, building automation, security system, smart home, telemedicine and other IoT applications.
- The module’s core processor ESP32-C3 integrates an industry-leading 32-bit RISC-V single-core microprocessor with a maximum clock speed of 160 MHz in a small-sized package. It comes with an on-board PCB antenna.
- The module supports for the standard IEEE802.11 b/g/n protocol and Bluetooth Low Energy 5.0 (Bluetooth LE): Bluetooth 5, Bluetooth mesh. The module can be used to help Bluetooth pairing and network connection to existing devices, or build an independe...
- 2 Features
- 3 Hardware Specifications
- 3.1 Block Diagram
- 3.3 Strapping Pins
- ESP32-C3 series has three strapping pins.
- GPIO2
- GPIO8
- GPIO9
- 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...
- By default, GPIO9 is connected to the internal pull-up resistor. If GPIO9 is not connected or connected to an external high-impedance circuit, the latched bit value will be “1”.
- To change the strapping bit values, you 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-C3 family. After reset, the strapping pins work as normal-function pins.
- Refer to Table 2 for a detailed boot-mode configuration of the strapping pins.
- Figure 3 shows the setup and hold times for the strapping pin before and after the CHIP_EN signal goes high.
- 4 Electrical Characteristics
- 5 Application Note
- 6 Product Trial
- Sales email：sales@wireless-tag.com
- Technical support email：technical@wireless-tag.com
- Federal Communication Commission Statement (FCC, U.S.)
- IMPORTANT NOTES
- Co-location warning:
- OEM integration instructions:
- Validity of using the module certification:
- End product labeling:
- Information that must be placed in the end user manual:
- Integration instructions for host product manufactures according to KDB 996369 D03 OEM Manual v01
- 2.2 List of applicable FCC rules
- 2.3 Specific operational use conditions
- WiFi Specification：
- BLE Specification：
- 2.4 Limited module procedures
- 2.5 Trace antenna designs
- 2.6 RF exposure considerations
- 2.7 Antennas
- 2.9 Information on test modes and additional testing requirements
- BLE
- WIFI
- 2.10 Additional testing, Part 15 Subpart B disclaimer
- Manufacturer's Name: Wireless-Tag Technology Co., Ltd Sample Description: WIFI Module
- Trade Mark: wireless-tag Model number: WT32C3-S6
- This device was tested for operations. To comply with RF exposure requirements, a minimum separation distance of 20cm must be maintained between the user’s body and the charger, including the antenna. Third-party belt-clips, holsters, and similar acce...
- This device in compliance with the essential requirements and other relevant provisions of Directive 2014/53/EU. All essential radio test suites have been carried out. This restriction will be applied to all Member States of European Union.
- 1. The device complies with RF specifications when the device used at 20cm form your body Declaration of Conformity
- Hereby, Wireless-Tag Technology Co., Ltd declares that the product type WT32C3-S6 is in compliance with Directives 2014/53/EU.
- www.wireless-tag.com
- RF specification:
Wireless-Tag Technology Co., Ltd.
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Copyright ©2020 Wireless-Tag Technology Co., Ltd. All Rights Reserved.
Table 1 Pin Definitions and Descriptions
Pin Name Description
1
IO0
GPIO0，ADC1_CH0，XTAL_32K_P (32.768 kHz crystal input)
2
IO1
GPIO1，ADC1_CH1，XTAL_32K_N (32.768 kHz crystal output)
3
EN
Chip Enable pin:
High level: on, enables the chip.
Low level: off, low current.
Note: Do not leave the EN pin floating.
4
IO2
GPIO2，ADC1_CH2，FSPIQ
5
IO4
GPIO4，MTMS，ADC1_CH4，FSPIHD
6
IO5
GPIO5，MTDI，ADC2_CH0，FSPIWP
7
IO6
GPIO6，MTCK，FSPICLK
8
VCC
3.3V power supply; The output current delivered by the external
power supply is recommended to be above 500mA
9
GND GND
10 IO7
GPIO7，MTDO，FSPID
11 IO8 GPIO8
12 IO9 GPIO9
13 IO10
GPIO10，FSPICS0
14 IO3 GPIO3, ADC1_CH3
15 RXD0
U0RXD，GPIO20
16 TXD0
U0TXD，GPIO21
3.3 Strapping Pins
ESP32-C3 series has three strapping pins.
GPIO2
GPIO8
GPIO9
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.
By default, GPIO9 is connected to the internal pull-up resistor. If GPIO9 is not connected or connected to
an external high-impedance circuit, the latched bit value will be “1”.
To change the strapping bit values, you can apply the external pull-down/pull-up resistances, or use the