GF-RK3399-Kit Embedded Development Hardware Manual
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4
GND
J2/J3/J4/J5/J6/J7:RS232
Pin#
Signal Name
1
TXD
2
RXD
3
GND
J8
:
UART-TTL
Pin#
Signal Name
1
VCC_IO_3V3
2
UART_TXD
3
UART_RXD
4
GND
J1
:
RS485
Pin#
Signal Name
1
RS485_B
2
RS485_A
3
GND