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Technologies
STAD156WT-15 Equipment Manual
Release 01/2019
6
2
Interface Description
2.1 Serial Ports
STAD156WT-15 is integrated with 4 serial ports. UART1, UART2, UART3,
UART0 are RS-232 level converted, All have been treated with anti-static
treatment.
UART3,UART4 is RS232 and RS485 hardware reuse
（
UART3,UART4 is
either for RS232, either for RS485, they can’t be used at the same time
）
.
Serial port definition as table below,
Notice
：
UART2 serial port is the debug port. There will be printing information appear
while start-on. It can be used as the normal serial port after start-on.
232 Interface (J15):
Interface
Pin
Definition
Device Node
Level
UART1
1
1R
TtyS1
RS232
2
1T
UART2
3
2R
TtyS2
RS232
4
2T
5
GND
0V
UART3
6
3R
TtyS3
RS232
7
3T
UART4
8
4R
TtyS4
RS232
9
4T
