A PS/2 mouse is shown above with the cover removed. The ball (upper right) rolls two plastic X and Y axles with a slotted wheel at one end. The slotted.

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Presentation transcript:

A PS/2 mouse is shown above with the cover removed. The ball (upper right) rolls two plastic X and Y axles with a slotted wheel at one end. The slotted wheel passes through a square slotted case containing an IR emitter and detector pair. When the wheel rotates it generates pulses by interrupting the IR light beam. A microcontroller (lower left) counts the pulses and sends data packets containing mouse movement and button data to the PC.

Figure 11.1 Keyboard Transmission of a Scan Code.

Figure 11.2 System Transmission of a Command to PS/2 Device.

Figure 11.3 Key Numbers for Scan Code.

Figure 11.4 Keyboard UP1core

Figure 11.5 Example design using the Keyboard UP3core.

The Mouse UP3core

Figure 11.6 Transmission of Mouse Initialization Command.

Figure 11.7 Example Design Using Mouse UP3core