154 lines
5.4 KiB
ReStructuredText
154 lines
5.4 KiB
ReStructuredText
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################
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ESP32-S2-Saola-1
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################
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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.
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Specifications
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--------------
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- Wi-Fi 802.11 b/g/n (802.11n up to 150 Mbps)
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- Built around ESP32-S2 series of SoCs Xtensa® single-core
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- Integrated 4 MB SPI flash
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- Integrated 2 MB PSRAM
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- Peripherals
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- 43 × programmable GPIOs
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- 2 × 13-bit SAR ADCs, up to 20 channels
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- 2 × 8-bit DAC
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- 14 × touch sensing IOs
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- 4 × SPI
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- 1 × I2S
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- 2 × I2C
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- 2 × UART
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- RMT (TX/RX)
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- LED PWM controller, up to 8 channels
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- 1 × full-speed USB OTG
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- 1 × temperature sensor
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- 1 × DVP 8/16 camera interface, implemented using the hardware resources of I2S
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- 1 × LCD interface (8-bit serial RGB/8080/6800), implemented using the hardware resources of SPI2
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- 1 × LCD interface (8/16/24-bit parallel), implemented using the hardware resources of I2S
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- 1 × TWAI® controller (compatible with ISO 11898-1)
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- Onboard PCB antenna or external antenna connector
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Header Block
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------------
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.. note::
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Not all of the chip pins are exposed to the pin headers.
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J2
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^^^
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=== ==== ===== ===================================
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No. Name Type Function
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=== ==== ===== ===================================
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1 3V3 P 3.3 V power supply
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2 IO0 I/O GPIO0, Boot
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3 IO1 I/O GPIO1, ADC1_CH0, TOUCH_CH1
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4 IO2 I/O GPIO2, ADC1_CH1, TOUCH_CH2
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5 IO3 I/O GPIO3, ADC1_CH2, TOUCH_CH3
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6 IO4 I/O GPIO4, ADC1_CH3, TOUCH_CH4
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7 IO5 I/O GPIO5, ADC1_CH4, TOUCH_CH5
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8 IO6 I/O GPIO6, ADC1_CH5, TOUCH_CH6
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9 IO7 I/O GPIO7, ADC1_CH6, TOUCH_CH7
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10 IO8 I/O GPIO8, ADC1_CH7, TOUCH_CH8
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11 IO9 I/O GPIO9, ADC1_CH8, TOUCH_CH9
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12 IO10 I/O GPIO10, ADC1_CH9, TOUCH_CH10
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13 IO11 I/O GPIO11, ADC2_CH0, TOUCH_CH11
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14 IO12 I/O GPIO12, ADC2_CH1, TOUCH_CH12
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15 IO13 I/O GPIO13, ADC2_CH2, TOUCH_CH13
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16 IO14 I/O GPIO14, ADC2_CH3, TOUCH_CH14
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17 IO15 I/O GPIO15, ADC2_CH4, XTAL_32K_P
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18 IO16 I/O GPIO16, ADC2_CH5, XTAL_32K_N
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19 IO17 I/O GPIO17, ADC2_CH6, DAC_1
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20 5V0 P 5 V power supply
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21 GND G Ground
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=== ==== ===== ===================================
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J3
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^^^
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=== ==== ===== ====================================
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No. Name Type Function
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=== ==== ===== ====================================
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1 GND G Ground
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2 RST I CHIP_PU, Reset
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3 IO46 I GPIO46
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4 IO45 I/O GPIO45
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5 IO44 I/O GPIO44, U0RXD
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6 IO43 I/O GPIO43, U0TXD
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7 IO42 I/O GPIO42, MTMS
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8 IO41 I/O GPIO41, MTDI
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9 IO40 I/O GPIO40, MTDO
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10 IO39 I/O GPIO39, MTCK
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11 IO38 I/O GPIO38
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12 IO37 I/O GPIO37
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13 IO36 I/O GPIO36
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14 IO35 I/O GPIO35
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16 IO34 I/O GPIO34
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17 IO33 I/O GPIO33
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17 IO26 I/O GPIO26
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18 IO21 I/O GPIO21
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19 IO20 I/O GPIO20, ADC2_CH3, USB_D+
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20 IO19 I/O GPIO19, ADC2_CH3, USB_D-
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21 IO18 I/O GPIO18, ADC2_CH3, DAC_2
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=== ==== ===== ====================================
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P: Power supply;
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I: Input;
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O: Output;
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T: High impedance.
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Pin Layout
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----------
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.. figure:: ../_static/esp32-s2_saola1_pinlayout.png
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:align: center
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:width: 600
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:alt: ESP32-S2-Saola-1 (click to enlarge)
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:figclass: align-center
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Strapping Pins
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--------------
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Some of the GPIO's have important features during the booting process. Here is the list of the strapping pins on the `ESP32-S2`_.
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==== ========= ===================================================================== ============ ==============
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GPIO Default Function Pull-up Pull-down
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==== ========= ===================================================================== ============ ==============
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IO45 Pull-down Voltage of Internal LDO (VDD_SDIO) 1V8 3V3
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IO0 Pull-up Booting Mode SPI Boot Download Boot
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IO46 Pull-down Booting Mode Don't Care Download Boot
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IO46 Pull-up Enabling/Disabling Log Print During Booting and Timing of SDIO Slave U0TXD Active U0TXD Silent
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==== ========= ===================================================================== ============ ==============
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For more detailed information, see the `ESP32-S2`_ datasheet.
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Restricted Usage GPIOS
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----------------------
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Some of the GPIO's are used for the external flash and PSRAM. These GPIO's cannot be used:
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==== ===================
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GPIO Shared Function
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==== ===================
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IO26 Connected to PSRAM
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==== ===================
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Other GPIO's are `INPUT ONLY` and cannot be used as output pin:
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==== ===========================
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GPIO Function
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==== ===========================
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IO46 GPIO46
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==== ===========================
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Resources
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---------
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* `ESP32-S2`_ (Datasheet)
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* `ESP32-S2-WROVER`_ (Datasheet)
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* `ESP32-S2-Saola-1`_ (Schematics)
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.. _ESP32-S2: https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf
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.. _ESP32-S2-WROVER: https://www.espressif.com/sites/default/files/documentation/esp32-s2-wrover_esp32-s2-wrover-i_datasheet_en.pdf
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.. _ESP32-S2-Saola-1: https://dl.espressif.com/dl/schematics/ESP32-S2-SAOLA-1_V1.1_schematics.pdf
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