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Technical Specifications Appendix A
SUPERSTAR II User Manual Rev 3 47
A.2.2 Connector Pin Assignment
Table 7 shows the Interface and Power connector J1 pin assignment.
Table 7: J1 Interfaces and Power Connector Pin Assignment
J1 PIN # SIGNAL NAME FUNCTION
1 PREAMP Power for active antenna (40 mA max)
2 VCC Primary power (3.3V or 5.0V -0.5 V/+0.25 V)
3 VBATT
Back-up battery for real-time clock device
(external series diode required)
4 RX_NO_3/DISC_IO_3
Serial port Rx #3/ Programmable discrete I/O pin
(expansion pin for special applications)
5 MASTER_RESET Reset input pin (active low)
6 DISC_IP_1 Reprogramming control input pin (active high)
7 DISC_IP_2
Protocol select pin (see Section 3.5 on Page 24)
8 DISC_IP_3 NVM control pin (see Section 3.5 on Page 24)
9 DISC_IO_1
Programmable discrete I/O pin (expansion pin
for special applications)
10 GND Ground
11 TX_NO_1 Serial port Tx #1
12 RX_NO_1 Serial port Rx #1
13 GND Ground
14 TX_NO_2 Serial port Tx #2
15 RX_NO_2 Serial port Rx #2
16 GND Ground
17 DISC_IO_2
Programmable discrete I/O pin (expansion pin
for special applications)
18 GND Ground
19 TIMEMARK 1PPS output
20 TX_NO_3 Serial port Tx #3