ESP32-C3 SuperMini 4MB

Features / Specs

• Manufacturer: Generic
• Main Chip: Espressif ESP32-C3FH4X (RISC-V 32-bit single-core processor, up to 160 MHz)
• Antenna: Onboard chip antenna – no external antenna connector
• Flash Memory: 4 MB (in-package)
• ROM: 384 kB
• SRAM: 400 kB (16 kB usable as cache; plus 8 kB RTC SRAM)
• USB Interface: USB Type-C, connected directly to the ESP32-C3’s native USB (USB Serial/JTAG controller, USB 2.0 full speed) – no USB-to-serial chip
• Power Input Options:
  • USB Type-C Socket: 5 V
  • 5V Pin: Power input/output, connected directly to the USB Type-C VBUS line; 4.3 – 6.0 V in, through the onboard BAT60J Schottky diode and ME6211C33 LDO regulator (full 500 mA from 4.3 V)
• 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 (Chip): 3.0 – 3.6 V (supplied at 3.3 V by the onboard regulator)
• 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 (Chip): -40 °C to +105 °C
• Storage Temperature Range (Chip): -40 °C to +150 °C
• Usable Peripherals (This Board): 13x programmable GPIOs (all PWM-capable) / 2x UART (UART0 on GPIO20 / GPIO21) / 1x I²C / 1x SPI / 1x I²S / 6x ADC channels
• Full Chip Capabilities (Not All Exposed on This Board): 16x programmable GPIOs (the SPI flash pins are not bonded on this variant) / 3x SPI (SPI0 and SPI1 for flash, SPI2 general-purpose) / 2x UART / 1x I²C / 1x I²S / 2x 12-bit SAR ADC, up to 6 channels / 6x LED PWM channels / RMT, TWAI, GDMA, USB Serial/JTAG, temperature sensor
• Security Features (Chip): Secure boot / flash encryption / 4 kbit eFuse (OTP) / AES-128/256, SHA, RSA and HMAC acceleration / digital signature / random number generator / clock glitch detection
• GPIO:
  • Usable: 13x programmable GPIOs on header pins GPIO0 – GPIO10, GPIO20 and GPIO21
  • Analog: GPIO0 – GPIO5 (6x ADC channels) – GPIO5 is on ADC2, which Espressif notes is not factory-calibrated and inoperable on some chip revisions; use GPIO0 – GPIO4 for reliable reads
  • Strapping Pins: GPIO2 / GPIO8 (blue LED) / GPIO9 (Boot button) – sampled at reset to set the boot mode, so keep external circuits from pulling them the wrong way at power-up; all three are pulled up onboard
  • Shared with USB: GPIO18 / GPIO19 (USB D- / D+) – used by the USB Type-C port, not on the headers
  • Debug: USB Serial/JTAG over the USB Type-C port; JTAG is on header pins GPIO4 – GPIO7 (MTMS / MTDI / MTCK / MTDO)
• Onboard Peripherals:
  • Buttons: Reset / Boot (GPIO9)
  • LEDs: Blue user LED on GPIO8, lit when driven low / red power LED
• Dimensions (L x W x H): ~(22.52 x 18 x 4.1 mm)
• Number of Pins: 2x 8 pins (16 total)
• Header Pin Pitch: 2.54 mm
• Pin Row Spacing (Centre to Centre): ~15.24 mm

• 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) / +20 dBm (802.11n)
• WiFi Modes: Station / SoftAP / Station + SoftAP / promiscuous
• 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: -105 dBm @ 125 kbps / -93 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

• NOTE: Datasheets and schematic are for reference only – the manufacturer of this board and its supporting parts is unconfirmed.
• Espressif ESP32-C3 Product Page
• Espressif ESP32-C3 Series Datasheet
• ESP32-C3 SuperMini Schematic