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ESP32-S2-Saola-1

docs/en/boards/ESP32-S2-Saola-1.rst

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################ ESP32-S2-Saola-1 ################

The ESP32-S2-Saola-1_ development board is one of Espressif's official boards. This board is based on the ESP32-S2-WROVER_ module, with the ESP32-S2_ as the core.

Specifications

  • Wi-Fi 802.11b/g/n (802.11n up to 150 Mbps)
  • Built around ESP32-S2 series of SoCs Xtensa® single-core
  • Integrated 4 MB SPI flash
  • Integrated 2 MB PSRAM
  • Peripherals
    • 43 × programmable GPIOs
    • 2 × 13-bit SAR ADCs, up to 20 channels
    • 2 × 8-bit DAC
    • 14 × touch sensing IOs
    • 4 × SPI
    • 1 × I2S
    • 2 × I2C
    • 2 × UART
    • RMT (TX/RX)
    • LED PWM controller, up to 8 channels
    • 1 × full-speed USB OTG
    • 1 × temperature sensor
    • 1 × DVP 8/16 camera interface, implemented using the hardware resources of I2S
    • 1 × LCD interface (8-bit serial RGB/8080/6800), implemented using the hardware resources of SPI2
    • 1 × LCD interface (8/16/24-bit parallel), implemented using the hardware resources of I2S
    • 1 × TWAI® controller (compatible with ISO 11898-1)
  • PCB antenna or external antenna connector

Header Block

.. note:: Not all of the chip pins are exposed to the pin headers.

J2 ^^^

.. vale off

=== ==== ===== =================================== No. Name Type Function === ==== ===== =================================== 1 3V3 P 3.3 V power supply 2 IO0 I/O GPIO0, Boot 3 IO1 I/O GPIO1, ADC1_CH0, TOUCH_CH1 4 IO2 I/O GPIO2, ADC1_CH1, TOUCH_CH2 5 IO3 I/O GPIO3, ADC1_CH2, TOUCH_CH3 6 IO4 I/O GPIO4, ADC1_CH3, TOUCH_CH4 7 IO5 I/O GPIO5, ADC1_CH4, TOUCH_CH5 8 IO6 I/O GPIO6, ADC1_CH5, TOUCH_CH6 9 IO7 I/O GPIO7, ADC1_CH6, TOUCH_CH7 10 IO8 I/O GPIO8, ADC1_CH7, TOUCH_CH8 11 IO9 I/O GPIO9, ADC1_CH8, TOUCH_CH9 12 IO10 I/O GPIO10, ADC1_CH9, TOUCH_CH10 13 IO11 I/O GPIO11, ADC2_CH0, TOUCH_CH11 14 IO12 I/O GPIO12, ADC2_CH1, TOUCH_CH12 15 IO13 I/O GPIO13, ADC2_CH2, TOUCH_CH13 16 IO14 I/O GPIO14, ADC2_CH3, TOUCH_CH14 17 IO15 I/O GPIO15, ADC2_CH4, XTAL_32K_P 18 IO16 I/O GPIO16, ADC2_CH5, XTAL_32K_N 19 IO17 I/O GPIO17, ADC2_CH6, DAC_1 20 5V0 P 5 V power supply 21 GND G Ground === ==== ===== ===================================

.. vale on

J3 ^^^ === ==== ===== ==================================== No. Name Type Function === ==== ===== ==================================== 1 GND G Ground 2 RST I CHIP_PU, Reset 3 IO46 I GPIO46 4 IO45 I/O GPIO45 5 IO44 I/O GPIO44, U0RXD 6 IO43 I/O GPIO43, U0TXD 7 IO42 I/O GPIO42, MTMS 8 IO41 I/O GPIO41, MTDI 9 IO40 I/O GPIO40, MTDO 10 IO39 I/O GPIO39, MTCK 11 IO38 I/O GPIO38 12 IO37 I/O GPIO37 13 IO36 I/O GPIO36 14 IO35 I/O GPIO35 16 IO34 I/O GPIO34 17 IO33 I/O GPIO33 17 IO26 I/O GPIO26 18 IO21 I/O GPIO21 19 IO20 I/O GPIO20, ADC2_CH3, USB_D+ 20 IO19 I/O GPIO19, ADC2_CH3, USB_D- 21 IO18 I/O GPIO18, ADC2_CH3, DAC_2 === ==== ===== ====================================

P: Power supply;
I: Input;
O: Output;
T: High impedance.

Pin Layout

.. figure:: ../../_static/esp32-s2_saola1_pinlayout.png :align: center :width: 600 :alt: ESP32-S2-Saola-1 (click to enlarge) :figclass: align-center

Strapping Pins

Some of the GPIO's have important features during the booting process. Here is the list of the strapping pins on the ESP32-S2_.

==== ========= ===================================================================== ============ ============== GPIO Default Function Pull-up Pull-down ==== ========= ===================================================================== ============ ============== IO45 Pull-down Voltage of Internal LDO (VDD_SDIO) 1.8 V 3.3 V IO0 Pull-up Booting Mode SPI Boot Download Boot IO46 Pull-down Booting Mode Don't Care Download Boot IO46 Pull-up Enabling/Disabling Log Print During Booting and Timing of SDIO Slave U0TXD Active U0TXD Silent ==== ========= ===================================================================== ============ ==============

For more detailed information, see the ESP32-S2_ datasheet.

Restricted Usage GPIOS

Some of the GPIO's are used for the external flash and PSRAM. These GPIO's cannot be used:

==== =================== GPIO Shared Function ==== =================== IO26 Connected to PSRAM ==== ===================

Other GPIO's are INPUT ONLY and cannot be used as output pin:

==== =========================== GPIO Function ==== =========================== IO46 GPIO46 ==== ===========================

Resources

  • ESP32-S2_ (Datasheet)
  • ESP32-S2-WROVER_ (Datasheet)
  • ESP32-S2-Saola-1_ (Schematics)

.. _ESP32-S2: https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf .. _ESP32-S2-WROVER: https://www.espressif.com/sites/default/files/documentation/esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf .. _ESP32-S2-Saola-1: https://dl.espressif.com/dl/schematics/ESP32-S2-SAOLA-1_V1.1_schematics.pdf