Usb Connector; Real Time Clock And Cmos Ram; Keyboard And Ps/2 Mouse Connector - AXIOMTEK sbc84500 User Manual

SBC84500 User's Manual

3.15 USB Connector

There are two USB connectors allow installation of USB
devices. USB1 is a single standard USB connector. USB1 is
4-pin header connector. The following table shows the pin outs
of the USB connector.
Pin # Signal Name
USB0/1 Vcc
1
2 USB0/1-
USB0/1+
3
4 USB0/1 GND

3.16 Real Time Clock and CMOS RAM

The SBC84500VEA contains an MC146818 compatible Real Time Clock
(RTC) and 128 byte of CMOS RAM in the WINBOND W83977AF, or its
equivalent. The CMOS RAM stores the system configuration information
entered via the SETUP program. The RTC and the CMOS RAM are kept
active by a battery when the system power is turned off, and the battery
power can last for ten years.

3.17 Keyboard and PS/2 Mouse Connector

KBMS1 is a DIN connector for PS/2 keyboard connection.
Mouse Clock
Mouse Data
24
1 2
1 2
KBMS1
Keyboard Clock
6 5
4
3
GND
VCC
Keyboard Data
2 1
3 4
U S B 1
U S B 0
3 4
Hardware Description