Specifications

AR-B1564 User¡¦s Guide
3-18
3.2.12 External Speaker Header (J4)
Besides the on board buzzer, you can use an external speaker by connecting J4 header directly.
1 : Speaker+2, 3, 4: Speaker-
Figure 3-29 J4: Speaker Header
3.2.13 Reset Header (J13)
J13 is used to connect to an external reset switch. Shorting these two pins will reset the system.
1 Reset+2 Reset-
Figure 3-30 J13: Reset Header
3.2.14 USB Connector (CN2)
USB is the abbreviation of Universal Serial Bus. The Universal Serial Bus (USB) standard is a low-to-medium
speed interface for the connection of PC peripherals.
The USB standard simplifies the connection of peripherals to PCs with a uniform hardware and software interface.
Personal computers equipped with USB allow computer peripherals to be automatically configured as soon as they
are physically attached - without the need to reboot or run setup.
USB is a leading edge technology that allows the user to quickly and easily adding wide range peripheral devices
from printers to keyboards and telephony devices to fax/modems. Universal Host Controller Interface (UHCI) and
future support for the Open Host Controller Interface (OHCI) ensure USB compatibility and usability well into the
future.
The connector on the CPU board supports two Universal Serial Bus ports. An optional external port bracket
attaches to the onboard connector via an attached cable. With the optional port bracket installed you can attach
USB devices to the external ports. If the USB ports are installed, the USB Controller line in the Integrated
Peripherals section of the CMOS Setup utility must be set to “ Enabled” . USB ports may also require Operating
System support for USB devices.
Figure 3-31 CN2: USB Connector
Pin Description Pin Description
1 VCC 2 VCC
3 -DATA 4 -DATA
5 +DATA 6 +DATA
7 GND 8 GND
9 CASE 10 CASE
Table 3-13 CN2: USB Connector Pin Assignment