Espressif Systems ESP32-S2-WROOM User Manual

Wi-fi mcu modules

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ESP32-S2-WROOM &

ESP32-S2-WROOM-I

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Prerelease version 0.5

Espressif Systems

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Summary of Contents for Espressif Systems ESP32-S2-WROOM

Page 2 About This Document This document provides the specifications for the ESP32-S2-WROOM and ESP32-S2-WROOM-I module. Document Updates Please always refer to the latest version on https://www.espressif.com/en/support/download/documents. Revision History For revision history of this document, please refer to the last page. Documentation Change Notification Espressif provides email notifications to keep customers updated on changes to technical documentation.
Page 3 • HTOL/HTSL/uHAST/TCT/ESD 1.2 Description ESP32-S2-WROOM and ESP32-S2-WROOM-I are two powerful, generic Wi-Fi MCU modules that have a rich set of peripherals. They are an ideal choice for a wide variety of application scenarios relating to Internet of Things (IoT), wearable electronics and smart home.
Page 4 • Wi-Fi-enabled Toys • Image Recognition • Wearable Electronics • Mesh Network • Retail & Catering Applications • Home Automation • Smart Home Control Panel • Smart POS Machines ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 5 The pin diagram shows the approximate location of pins on the module. For the actual mechanical diagram, please refer to Figure Physical Dimensions. Pin Description The module has 42 pins. See pin definitions in Table 2. ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 6 IO40 I/O/T MTDO, GPIO40, CLK_OUT2 IO41 I/O/T MTDI, GPIO41, CLK_OUT1 IO42 I/O/T MTMS, GPIO42 TXD0 I/O/T U0TXD, GPIO43, CLK_OUT1 RXD0 I/O/T U0RXD, GPIO44, CLK_OUT2 IO45 I/O/T GPIO45 IO46 GPIO46 ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 7 Booting Mode Default SPI Boot Download Boot Pull-up IO46 Pull-down Don’t-care Enabling/Disabling ROM Code Print During Booting Default Enabled Disabled IO46 Pull-down See the fourth note See the fourth note ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 8 1 and IO46 is 0, print is normal during boot; but if IO46 is 1, print is disabled. 2 and IO46 is 0, print is disabled; but if IO46 is 1, print is normal. 3, print is disabled and not controlled by IO46. ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 9 VDD + 0.3 Chip reset release voltage IH_nRST –0.3 — 0.25 × VDD Chip reset voltage IL_nRST Note: VDD is the I/O voltage for a particular power domain of pins. ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 10 • The ”ULP sensor-monitored pattern” refers to the mode where the ULP coprocessor or the sensor works periodi- cally. When touch sensors work with a duty cycle of 1%, the typical current consumption is 7 µA. ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems...
Page 11 1. Target TX power is configurable based on device or certification requirements. 5.5.3 Receiver Characteristics Table 11: Receiver Characteristics Parameter Rate Unit 1 Mbps –97 2 Mbps –95 RX Sensitivity 5.5 Mbps –93 11 Mbps –88 6 Mbps –92 ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 12 11n, HT40, MCS0 11n, HT40, MCS7 11b, 11 Mbps 11g, 6 Mbps 11g, 54 Mbps Adjacent Channel Rejection 11n, HT20, MCS0 11n, HT20, MCS7 11n, HT40, MCS0 11n, HT40, MCS7 ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 13 6. Physical Dimensions and PCB Land Pattern Physical Dimensions and PCB Land Pattern 6.1 Physical Dimensions Figure 6: Physical Dimensions ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 14 6. Physical Dimensions and PCB Land Pattern 6.2 Recommended PCB Land Pattern Figure 7: Recommended PCB Land Pattern ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 15 6. Physical Dimensions and PCB Land Pattern 6.3 U.FL Connector Dimensions Unit: mm Figure 8: U.FL Connector Dimensions ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 16 Solder — Sn&Ag&Cu Lead-free solder (SAC305) Figure 9: Reflow Profile Note: Solder the module in a single reflow. If the PCBA requires multiple reflows, place the module on the PCB during the final reflow. ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 17 There are seven blocks in eFuse for users to use. Each block is 256 bits in size and has independent write/read disable controller. Six of them can be used to store encrypted key or user data, and the remaining one is only used to store user data. ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 18 9. Antenna Specifications Antenna Specifications 9.1 PCB Antenna Model: ESP ANT B Assembly: PTH Gain: ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 19 9. Antenna Specifications Dimensions: Pattern Plots: ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 20 9. Antenna Specifications ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 21 9. Antenna Specifications 9.2 IPEX Antenna Specifications: Gain: ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 22 9. Antenna Specifications Directivity Diagram: Dimensions: Espressif Systems ESP32-S2-WROOM & ESP32-S2-WROOM-I Datasheet V0.5 Submit Documentation Feedback...
Page 23 Here are the ESP32-S2-related must-have resources. • ESP32-S2 BBS This is an Engineer-to-Engineer (E2E) Community for ESP32-S2 where you can post questions, share knowl- edge, explore ideas, and help solve problems with fellow engineers. ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 24 Revision History Revision History Date Version Release notes 2020-03-10 V0.5 Preliminary release ESP32-S2-WROOM & ESP32-S2-WROOM-I User Manual V0.5 Espressif Systems Submit Documentation Feedback...
Page 25 OEM Guidance 1. Applicable FCC rules This module is granted by Single Modular Approval. It complies to the requirements of FCC part 15C, section 15.247 rules. 2. The specific operational use conditions This module can be used in IoT devices. The input voltage to the module is nominally 3.3V-3.6 V DC.
Page 26 built into a host as a portable usage, the additional RF exposure evaluation may be required as specified by 2.1093. 6. Antenna Antenna type: PCB antenna/Dipole Antenna; Peak gain: 3.40dBi /2.33dBi 7. Label and compliance information An exterior label on OEM’s end product can use wording such as the following: “Contains Transmitter Module FCC ID: 2AC7Z-ESP32S2WROOM”...
Page 27 The host integrator installing this module into their product must ensure that the final composite product complies with the FCC requirements by a technical assessment or evaluation to the FCC rules, including the transmitter operation and should refer to guidance in KDB 996369.

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