9
DATA, are bidirectional “open-collector” signals; they are normally held at a high (+5V) level by a 5–10K
pull-up resistor on the host, but either the host or the Touchpad device can pull them low at any time. When
the port is idle, both signal wires are floating high. The host can inhibit the device at any time by holding CLK
low.
Note that neither side ever actively pulls CLK or DATA high; to output a logic 1, the wire is left un-driven and
allowed to float high. The CLK and DATA lines should have a total capacitance of no more than 500pF to
ensure that the 5–10K pull-up resistor is able to drive them to a high voltage level in a reasonable time.
An external PS/2 mouse port uses a mini-DIN-6 connector with the following pinout (male connector view):
1 N/C
2 PS/2 DATA
3 Power +5V
4 Ground 0V
5 N/C
6 PS/2 CLK
------------------------
Input Diagram III
Input
1
DC POWER INPUT
Adapter inlet for DC12V power system.
2
USB
This can be connected to computer USB interface.
3
KEYBOARD
This can be connected to computer PS/2 keyboard interface.
4
MOUSE
This Can be connected to computer PS/2 mouse interface.
5
VGA
This can be connected to computer VGA with the D-Sub 15 pin signal connector.
* This specification are subject to be changed without notice.
