E220-400MBL-01 Ebyte E220 series module test board USB interface pre welding interface
[Interface]：USB
[Chip]：LLCC68
[Product weight]：126±0.1g
[Size]：53*27mm
[Introduction]：E220-400MBL-01 is an small module developed independently based on the generation of LoRa TM RF chip LLCC68 produced by Semtech company. LLCC68 is suitable for 433MHz and 470MHz SMD wireless module and uses industrial 32mhz crystal oscillator.
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| Pin number | definition | Functional Description |
| 1 | VCC | The module power supply pin needs to be short-circuited with pin 2 to power the module. |
| 2 | 3.3V | 3.3V power pin |
| 3 | 3.3V | 3.3V power pin |
| 4 | SAW | MCU power supply pin, needs to be short-circuited with pin 3 to power the MCU |
| 5 | GND | Baseplate reference ground |
| 6 | REST | MCU external reset pin |
| 7 | SWIM | MCU's SWIM pin |
| 8 | SAW | MCU power supply pin |
| 9 | PC0 | Module reset pin |
| 10 | PB7 | Module MISO pin |
| 11 | PB6 | Module MOSI pin |
| 12 | PB5 | Module SCLK pin |
| 13 | PB4 | Module NSS pin |
| 14 | TXD | MCU serial port TXD |
| 15 | RXD | MCU serial port RXD |
| 16 | M1 | Module mode switching pin (see module product manual for details) |
| 17 | GND | Baseplate reference ground |
| 18 | M0 | Module mode switching pin (see module product manual for details) |
| 19 | GND | Baseplate reference ground |