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| Pin | Description |
|---|---|
| RST | External Reset - Low=RESET, High=NORMAL |
| ADC | Analog DIgital Converter - Max Voltage = 1V |
| EN | Chip Enable - Low=DISABLED, High=NORMAL |
| GPIO16 | GPIO16 |
| GPIO14 | GPIO14, CLK(SPI) |
| GPIO12 | GPIO12, MISO(SPI) |
| GPIO13 | GPIO13, MOSI(SPI) |
| VCC | 3.3V |
| TX0/GPIO1 | TX0, GPIO1 |
| RX0/GPIO3 | RX0, GPIO3 |
| GPIO5 | GPIO5 |
| GPIO4 | GPIO4 |
| GPIO0 | GPIO0, HIGH on boot |
| GPIO2 | GPIO2, HIGH on boot |
| GPIO15 | GPIO15, LOW on boot |
| GND | Ground |
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