UNICORECOMM UB4B0 User Manual page 22

No Signal
1 GND
2 RTK LED
3 Reserved
4 PPS
5 VCC
6 VCC
7 Rx3 or Event2
8 Event1
9 ERROR
10 Satellite LED
11 CTS2
12 RESETIN
13 RTS2
14 RxD2
15 CTS1
16 TxD2
17 RTS1
18 RxD1
19 TxD3 or GPIO0
Type Description
Ground Ground Reference
Output RTK LED
RSV RSV
Output Time Mark Output
Power Supply Voltage, +3.3V
Power Supply Voltage, +3.3V
Input External Event 2 Default:
COM3 Receive Data
Input External Event 1
Output Error Detected LED
Output Satellite LED
Input COM2 Clear to Send
Input Hardware reset
Output COM2 Request to Send
Input COM2 Receive data
Input COM1 Clear to Send
Output COM2 transmit data
Output COM1 Request to Send
Input COM1 receive data
Input / General Purpose I/O
Output Default: COM3 Transmit
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UB4B0 User Manual
Note
LVTTL, High level
effective
RSV
LVTTL
+5%/–3%
+5%/–3%
LVTTL
LVTTL
LVTTL, Low Level
effective
LVTTL, Low Level
effective
LVTTL
LVTTL, Low Level
effective,
duration >5ms
LVTTL
LVTTL
RS-232
LVTTL
RS-232
RS-232
LVTTL