Vcc - : wd led, 2 x 3 int bz 4 buz z 1 vcc, 19. external speaker header(cn20) – Curtis AR-B1682 User Manual
Page 22: Enable external buzzer, 21. vga crt connector(cn19), 22. watchdog connector(cn17), 4 on enable internal buzzer
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2-19. EXTERNAL SPEAKER HEADER(CN20)
3-4 On
Enable Internal Buzzer
2 X
3 INT BZ
4 BUZ Z
1 Vcc
Enable External Buzzer
2 X
3 INT BZ
4 BUZ Z
1 Vcc
2-20. Ethernet RJ-45 Connector(CN21)
The pin assignments are as follows:
1
8
PIN FUNCTION
PIN ASSIGNMENT
1
TPTX+
5
NOT USED
2
TPTX+
6
TPRX-
3
TPRX+
7
NOT USED
4
NOT USED
8
NOT USED
2-21. VGA CRT CONNECTOR(CN19)
6
10
15
11
1
2
3
4
5
1
Red
2
Green
3
Blue
13
Horizontial
14 Vertical
4, 9,11, 12 & 15 Not Used
5 & 10
Ground
6, 7 & 8
GND
2-22. WATCHDOG CONNECTOR(CN17)
+:Vcc
- : WD LED