Specifications

Chapter 3 Hardware
ReadyBoard 800 Reference Manual 49
Miscellaneous
Utility Interface (J12)
• Power-On – This control signal is provided externally through a switch by connecting ground to
pin-1 on the Utility connector (J12).
• Reset Switch – This signal is provided externally through a switch by connecting ground to pin-3
on the Utility connector (J12). This signal line is shared with Reset Switch (SW1).
• PC Beep Speaker – The output signals from the I/O Hub (82801DBM) and the Super I/O
(W83627HF) are fed to pin-5 of the Utility connector (J12) through an OR circuit, and in
conjunction with the +5V (pin-4), drives an external PC Beep speaker. The PC Beep speaker
signal from the I/O Hub is also fed to the on-board Audio CODEC to provide a PC Beep signal
for the Line out connections.
Table 3-18. Utility Interface Pin/Signal Descriptions (J12)
Pin # Signal Description
1 PS_On Power On input (connect between pins 1 & 2)
2 GND Ground
3 RST_SW Reset Switch input or output (connect between pins 3 & 2)
4 +5V +5 Volts
5 Speaker PC Beep Speaker + Output (connect between pins 5 & 4)
Note: The shaded area denotes power or ground.
Reset Switch (J20)
The reset switch (SW1), located on the board edge, provides an internal reset signal (momentary
ground) to the ReadyBoard 800. The reset switch (J20) shares the reset line with pin-3 of the Utility
interface (J12).
Keyboard/Mouse Interface (J19)
The PS/2 Keyboard and Mouse signal lines share the same mini-DIN connector (J19). A PS/2 Y-cable is
required for connection to the PS/2 connector (J19), on the board edge.
NOTE The keyboard and mouse are not interchangeable on the Y-cable, since each
device has a specific connector on the Y-cable. The Super I/O senses when
each device is connected and provides the appropriate signals.
Table 3-19. Keyboard/Mouse Interface Pin/Signal Descriptions (J19)
Pin # Signal Description
1 KB_Data Keyboard data
2 MS_Data Mouse Data
3 GND Ground
4 PS2V5 Keyboard/Mouse Power (+ 5V +/- 5%)
5 KB_Clk Keyboard Clock
6 MS_Clk Mouse Clock
7, 8, 9, 10 GND Ground (Used for grounding the shield on the connector)
Note: The shaded area denotes power or ground.