MITX-DNV0 Series - User Guide, Rev. 1.2
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7.8.
PS/2 Keyboard and Mouse Wafer (CN21)
Attachment of a PS/2 keyboard / mouse can be done through the pinrow connector CN21. Both interfaces utilize
open-drain signalling with on-board pull-up.
Figure 18: PS/2 Keyboard / Mouse Wafer CN21
Table 33: Pin Assignment CN21
Pin
Signal
Note
1
MSCLK
2
VCC
3
MSDAT
4
KBDAT
5
GND
6
KBCLK
Table 34: Signal Description
Signal
Description
MSCLK
Bi-directional clock signal used to strobe data/commands from/to the PS/2 mouse.
MSDAT
Bi-directional serial data line used to transfer data from or commands to the PS/2 mouse.
KBCLK
Bi-directional clock signal used to strobe data/commands from/to the PC-AT keyboard.
KBDAT
Bi-directional serial data line used to transfer data from or commands to the PC-AT keyboard.