Section 1. System Overview; Introduction - Motorola M68HC08 Designer Reference Manual

Designer Reference Manual — DRM055

1.1 Introduction

High Data Rate Wireless USB Optical Mouse Solution
MOTOROLA
Freescale Semiconductor, Inc.
This manual describes a reference design for a high data rate wireless
universal serial bus (USB) optical mouse solution by using the
MC68HC908QY4 and the MC68HC908JB12.
Because of the lower cost, adoption of wireless PC peripherals has been fast
paced. Consumers are quickly recognizing the advantages of using wireless
PC peripherals, which include portability and placement flexibility. However,
there are two major performance issues in general 27-MHz wireless platforms.
These issues affect wireless mouse applications in particular.
1. The mouse cursor motion tracking speed is slow
2. There is a long legacy time in response to an end-user action
These issues can be resolved by implementation of a new high-speed
transmission link. The tracking speed of the high data rate wireless mouse is
almost doubled and the response time is reduced by half. The performance is
even compatible to a corded mouse in terms of data report rates uploaded to
the PC host from the peripheral device. From the end users point of view, the
overall movement of the mouse can be fully cached up and reflected on the
computer screen without any noticeable delay in cursor response.
The following reference materials are available at:
http://motorola.com/semiconductors
• Schematic diagram
• PCB layout
• PCB Gerber
• Bill of materials
• Source code
System Overview
For More Information On This Product,
Go to: www.freescale.com

Section 1. System Overview

DRM055
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