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ESP8266EX
EspressifESP8266EX
The ESP8266EX is a Wi-Fi SoC with integrated Tensilica L106 processor, supporting 802.11 b/g/n and featuring GPIO, ADC, PWM, I2C, SPI, UART interfaces.
In stock
Specifications
7- Operating Voltage
- 2.5 V ~ 3.6 V
- Clock Speed
- 160 MHz
- Flash
- up to 16 MB
- Ram
- < 50 kB (Station mode)
- Gpio Count
- 32
- Dimensions
- QFN32-pin (5 mm x 5 mm)
- Connectivity
- SPI, SDIO, I2C, UART, PWM, ADC
Pinout
33| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | VDDA | ADC | Analog Power 2.5 V ~ 3.6 V |
| 2 | LNA | GPIO | RF antenna interface, Chip output impedance = 39 + j6 Ω |
| 3 | VDD3P3 | POWER | Amplifier Power 2.5 V ~ 3.6 V |
| 4 | VDD3P3 | POWER | Amplifier Power 2.5 V ~ 3.6 V |
| 5 | VDD_RTC | GND | NC (1.1 V) |
| 6 | TOUT | GPIO | ADC pin for testing power-supply voltage |
| 7 | CHIP_EN | GPIO | Chip Enable, High: On, Low: Off |
| 8 | XPD_DCDC | GPIO | Deep-sleep wakeup (need to be connected to EXT_RSTB) |
| 9 | MTMS | SPIPWM | HSPI_CLK, GPIO 14 |
| 10 | MTDI | SPIPWM | HSPI_MISO, GPIO 12 |
| 11 | VDDPST | POWER | Digital/IO Power Supply (1.8 V ~ 3.6 V) |
| 12 | MTCK | SPIUART | HSPI_MOSI, UART0_CTS, GPIO 13 |
| 13 | MTDO | SPIPWM | HSPI_CS, UART0_RTS, GPIO 15 |
| 14 | GPIO2 | UARTGPIO | UART TX during flash programming, GPIO2 |
| 15 | GPIO0 | SPIPWMGPIO | SPI_CS2, GPIO0 |
| 16 | GPIO4 | SPIPWMGPIO | GPIO4 |
| 17 | VDDPST | POWER | Digital/IO Power Supply (1.8 V ~ 3.6 V) |
| 18 | SD_DATA_2 | SPII2C | Connect to SD_D2, SPIHD, HSPIHD, GPIO9 |
| 19 | SD_DATA_3 | SPII2C | Connect to SD_D3, SPIWP, HSPIWP, GPIO10 |
| 20 | SD_CMD | SPII2C | Connect to SD_CMD, SPI_CS0, GPIO11 |
| 21 | SD_CLK | SPII2C | Connect to SD_CLK, SPI_CLK, GPIO6 |
| 22 | SD_DATA_0 | SPIADC | Connect to SD_D0, SPI_MISO, GPIO7 |
| 23 | SD_DATA_1 | SPII2C | Connect to SD_D1, SPI_MOSI, GPIO8 |
| 24 | GPIO5 | SPIPWMGPIO | GPIO5 |
| 25 | U0RXD | UARTGPIO | UART Rx during flash programming, GPIO3 |
| 26 | U0TXD | SPIPWMUARTGPIO | UART TX during flash programming, SPI_CS1, GPIO1 |
| 27 | XTAL_OUT | I2CSPI | Connect to crystal oscillator output, can be used for BT clock input |
| 28 | XTAL_IN | I2CSPI | Connect to crystal oscillator input |
| 29 | VDDD | POWER | Analog Power 2.5 V ~ 3.6 V |
| 30 | VDDA | POWER | Analog Power 2.5 V ~ 3.6 V |
| 31 | RES12K | GPIO | Serial connection with a 12 kΩ resistor and connect to the ground |
| 32 | EXT_RSTB | GND | External reset signal (Low voltage level: active) |
| 33 | GND | — |
Interactive pinout
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ESP8266EX
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