Silk screen mark | explain |
SCK | SPI clock line |
VCC | Power supply 3.3v-5v |
SDO | SPI data output |
SDI | SPI data input |
GND | Ground wire |
NCS | SPI chip selection |
SWCLK | MCU download clock line |
RX | TTL serial port receiving pin |
TX | TTL serial port sending pin |
SWDIC | MCU download cable |
After sale instructions