UMTS/HSPA Module Series
UC20 EVB User Guide
UC20_EVB_User_Guide Confidential / Released 22 / 30
Table 8: Pin Assignment of J301
3.6. Switch and Buttons
UC20 EVB comprises two buttons (S202 and S203) and one switch (S201). Figure 18 shows the switch
and buttons.
Figure 18: Switch and Buttons
J301 Pin
Signal Name
I/O
Description
1
RS232_DCD
O
Data carrier detection.
2
RS232_RXD
I
Receive data.
3
RS232_TXD
O
Transmit data.
4
RS232_DTR
I
Data terminal ready.
5
RS232_GND
/
GND.
6
NC
/
NC.
7
RS232_RTS
I
Request to send.
8
RS232_CTS
O
Clear to send.
9
RS232_RI
O
Ring indicator.
Quectel
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