Instruction Manual

AR-B1640 User’s Guide
17
3.15.3 LVDSVCC & LCDVCC VOLTAGE SELECT (LVDSV1)
1 2
6 5
3.16 INTERNAL & EXTERNAL BUZZER (ESPK1)
1
4
3.17 RESET SWITCH (RST1)
Shorting these two pins will reset the system.
2 1
3.18 EXTERNAL LED HEADER (LED1)
7 1
8 2
3.19 PC/104 CONNECTOR (PC-104)
63
64
1
2
39
40
1
2
LVDSV1 VOLTAGE
1-3 2-4
ON
+3.3V
(Factory Preset)
3-5 4-6
ON
+5V
PIN Signal
1 VCC
2 SBEEP
3
INTERNAL
BUZZER
4 SBEEP
PIN Signal
1 RST
2 GND
Pin INDICATION
1-2 Primary IDE Active
3-4 Secondary IDE Active
5-6 Watchdog Active
7-8 System Power
PIN 1,2: Connect to External BUZZER
3-4 ON (Factory Preset)
Use Internal BUZZER