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 Southbridge (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 Southbridge 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 (J18)

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 (SW1)

The reset switch (SW1), located on the board edge, provides an internal reset signal (momentary

ground) to the ReadyBoard 800. The reset switch (SW1) 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

used to connect to the PS/2 connector (J19), on the board edge.

NOTE 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 +KBMS Keyboard/Mouse Power (+ 5V +/- 5%)

5 KB_Clk Keyboard Clock

6 MS_Clk Mouse Clock

7, 8, 9 GND Ground (Used for grounding the shield on the connector

Note: The shaded area denotes power or ground.