Smart LTE Module Series
Smart EVB User Guide
Smart_ EVB_User_Guide
31 / 45
Table 8: Pin Assignment of Debug UART Port (J604)
3.10. Switches and Buttons
Smart EVB provides four switches (S801/S802/S803/S804) and nine buttons (S901/S902/S903
/S904/S905/S906/S907/S908/S909).
Pin No.
Pin Name
I/O
Description
1
Not connected
2
RS232_TXD
O
Transmit data
3
RS232_RXD
I
Receive data
4
Not connected
5
RS232_GND
Ground
6
Not connected
7
Not connected
8
Not connected
9
Not connected