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CD-ROM Scheda tecnica(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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2 / 6 page tomatically validate the packets adress and CRC, further reducing the microcontrollers processing tasks. The Cypress CY7C63231A enCoRe is a revolutionary chip that integrates numerous common components, including breakthrough crystal-less oscillator. The re- sult is an overall reduction in board components and reduced system cost. The EPROM based microcontroller allows easy firmware modification, as well as storage of Vendor and Product ID s without an external EE- PROM. This kit is connectable to a PC via the USB port. It is based on the 2.4GHz RF technology, the data gener- ated from displacement detection / button status in the laser mouse is encoded with a pre-defined serial type protocol handled by firmware in the MCU. In the RF stage, the encoded data is used for GFSK modula- tion. The captured data from the RF receiver stage is decoded with a corresponding packet format used for mouse applications. The final data is sent to the host through the USB interface. Figure 1. Sectional view of PCB assembly highlighting all optical mouse components (optical mouse sensor, clip, lens, LASER, PCB, and base plate). The Texas Instruments MSP430F1222 is the ultra low- power mixed signal microcontroller with a built-in 16-bit timer, 10-bit A/D converter with integrated refer- ence and data transfer controller (DTC) and twenty-two I/O pins. In addition, the MSP430F1222 microcontroller has built-in communication capability using asyn- chronous (UART) and synchronous (SPI) protocols. The architecture, combined with five low power modes is optimized to achieve extended battery life on wireless application. The Nordic nRF2402 and nRF2401A are the low power single-chip radio transmitter and transceiver for the world wide 2.4 - 2.5 GHz ISM band. The entire transmit- ter and transceiver including all inductors and filters are integrated in each single chip respectively which gives the lowest cost solution to the end user. All con- figurations of the nRF2402 transmitter and nRF2401A transceiver are done via a standard serial interface. The nRF devices include the ShockBurst engine which allow for high datarates on air using low datarates between the microcontroller and the nRF device, it will also au- SENSOR VSCEL PCB BASE PLATE LENS SURFACE VSCEL CLIP PCB |
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