EY-40
- 2018-10-14 162149.png
Connect TTL UART Serial interface to USB-TTL debugger
PIN | Description | Pull LOW | Pull HIGH |
---|---|---|---|
SEL | Mode Select | AT Commands | Data Transmission Mode |
CS | Chip Select Mode | Wakeup Mode | Sleep Mode * |
TXD | Data TX | - | - |
RXD | Data RX | - | - |