ESP32-S3-N16R8 Dev Board – ABrobot 44-Pin

Features / Specs

• Manufacturer: ABrobot
• Main Module: Espressif ESP32-S3-WROOM-1-N16R8 (Xtensa LX7 32-bit dual-core processor, up to 240 MHz)
• Antenna: Onboard PCB antenna – no external antenna connector
• Flash Memory: 16 MB (in-module, Quad SPI)
• ROM: 384 kB
• SRAM: 512 kB (plus 16 kB RTC SRAM)
• PSRAM: 8 MB (in-package, Octal SPI)
• USB Interface: 2x USB Type-C – one to the ESP32-S3’s native USB (USB OTG and USB Serial/JTAG), one through a WCH CH340K USB-to-serial chip
• Power Input Options:
  • USB Type-C Sockets: 5 V (either port)
  • 5V Pin: Power input/output, connected to the USB Type-C VBUS line (both ports) through the onboard 1N5819HW-7-F Schottky diode; 4.3 – 6.0 V in, to the onboard ME6211C33 LDO regulator (full 500 mA from 4.3 V)
• Back-Feed Protection: 1N5819HW-7-F Schottky diode (40 V, 1 A) between the USB Type-C VBUS line (both ports) and the 5V pin – stops power fed into the 5V pin from reaching the USB ports
• 3V3 Pin: Regulated 3.3 V output from the onboard ME6211C33 LDO regulator; a 3.3 V supply can also be fed in here, bypassing the regulator
• Operating Voltage Range (Module): 3.0 – 3.6 V
• I/O Logic Level: 3.3 V – inputs are rated to a maximum of VDD + 0.3 V, so the pins are not 5 V tolerant
• Communication Interface: USB / UART
• Bootloader Mode: Hold Boot while connecting USB, or hold Boot and press Reset
• Operating Temperature Range (Module): -40 °C to +65 °C
• Usable Peripherals (This Board): 33x programmable GPIOs / 3x UART (UART0 on TX / RX) / 2x I²C / 2x SPI / 2x I²S / 20x ADC channels / 14x capacitive touch channels / full-speed USB 2.0 OTG / USB Serial/JTAG controller
• Full Chip Capabilities (Not All Exposed on This Board): 45x programmable GPIOs / 4x SPI (2 reserved for flash/PSRAM access, 2 general-purpose) / 1x LCD interface / 1x DVP camera interface / 3x UART / 2x I²C / 2x I²S / 1x RMT (4x TX, 4x RX channels) / TWAI (CAN) / SD/MMC host controller
• Security Features (Chip): Secure boot / flash encryption / 4 kbit eFuse (OTP) / AES, SHA, RSA and HMAC acceleration / digital signature / random number generator
• GPIO:
  • Usable: 33x programmable GPIOs (the module exposes 36 of the chip’s 45; GPIO35 – GPIO37 go to the Octal SPI PSRAM)
  • Analog: GPIO1 – GPIO20 (20x ADC channels)
  • Touch: GPIO1 – GPIO14 (14x capacitive touch channels)
  • Strapping Pins: GPIO0 (Boot button) / GPIO3 / GPIO45 / GPIO46 – sampled at reset to set the boot mode, flash voltage and JTAG source, so keep external circuits from pulling them the wrong way at power-up
  • Used Onboard: GPIO35 / GPIO36 / GPIO37 (Octal SPI PSRAM) – on the header, but committed to the PSRAM whenever it is enabled (this board’s default)
  • Shared with USB: GPIO19 / GPIO20 (USB D- / D+) – only usable as GPIO if the native USB port is not in use
  • Debug: USB Serial/JTAG over the native USB Type-C port; JTAG is on header pins GPIO42 / GPIO41 / GPIO39 / GPIO40 (MTMS / MTDI / MTCK / MTDO)
• Onboard Peripherals:
  • Buttons: Reset / Boot (GPIO0)
  • LEDs: 3x WS2812-style addressable RGB LEDs, chained on GPIO48 / red power LED / blue LED on GPIO35 – don’t use it while PSRAM is enabled: testing confirmed toggling it crashes the firmware
• Dimensions (L x W x H): ~(63.3 x 27.85 x 4.7 mm) (includes module antenna)
• Number of Pins: 2x 22 pins (44 total)
• Header Pin Pitch: 2.54 mm
• Pin Row Spacing (Centre to Centre): ~25.4 mm (inner rows, breadboard/protoboard compatible) / ~27.94 mm (outer rows)

• WiFi Standards: IEEE 802.11b/g/n
• WiFi Frequency Band: 2.4 GHz
• WiFi Channel Bandwidth: 20 MHz / 40 MHz
• WiFi Data Rate (Max): 150 Mbps
• WiFi Transmit Power (Max): +21 dBm (802.11b) / +19.5 dBm (802.11n)
• WiFi Modes: Station / SoftAP / Station + SoftAP
• WiFi Security: WPA2-PSK / WPA2-Enterprise / WPA3-PSK / WPA3-Enterprise

• Bluetooth Version: Bluetooth 5 (LE), Bluetooth mesh
• Bluetooth Data Rates: 125 kbps / 500 kbps / 1 Mbps / 2 Mbps
• Bluetooth Transmit Power (Max): +20 dBm
• Bluetooth Receive Sensitivity: -104.5 dBm @ 125 kbps / -93.5 dBm @ 2 Mbps
• Bluetooth LE Features: Advertising extensions / multiple advertising sets / simultaneous advertising and scanning
• Antenna Sharing: WiFi and Bluetooth share the one antenna, through the chip’s internal coexistence mechanism

Resources

• Espressif ESP32-S3-WROOM-1 & ESP32-S3-WROOM-1U Datasheet
• Microne ME6211 Datasheet V14
• ABrobot ESP32-S3-N16R8 44-Pin Schematic
• WCH CH340/CH341 Windows Driver (includes CH340K)

Pin Description