Ampro Corporation 700 manual Miscellaneous, Utility Interface J18, Reset Switch SW1

Chapter 3 Hardware

Miscellaneous

Utility Interface (J18)

♦Power-On – This control signal is provided externally by connecting ground to pin-1 on the Utility connector (J18).

♦Reset Switch – This signal is provided externally through a switch by connecting ground to pin-3 on the Utility connector (J18). This signal line is shared with Reset Switch (SW1).

♦PC-Beep Speaker – This output signal from the Southbridge (VT82C686B) is fed to pin-5 of the Utility connector (J18), and in conjunction with the +5V (pin-4), drives an external PC speaker. The PC-Beep Speaker signal is also fed to the on board Audio CODEC to provide a PC-beep signal for the Line out connections.

Table 3-23. Utility Interface Pin/Signal Descriptions (J18)

Pin #	Signal	Description
1	PS_0n	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	BUZZG	PC-Beep Speaker + Output (connect between pins-5 & -4)

Notes: 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 700. The reset switch (SW1) shares the reset signal line with pin-3 of the Utility interface (J18).

Keyboard/Mouse Interface (J16)

The PS/2 Keyboard and Mouse signal lines, also fully PC/AT compatible, share the same mini-DIN connector (J16). A PS/2 Y-cable connects to the PS/2 connector (J16), on the board edge.

	NOTE		Either device can be connected to either of the connectors on the Y-cable.
			The Southbridge senses where each device is connected and provides the
			appropriate signals for both.
Table 3-24. Keyboard/Mouse Interface Pin/Signal Descriptions (J16)
		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

Notes: The shaded area denotes power or ground.

ReadyBoard 700 Reference Manual 49