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ADNS-6130-001 Datasheet(PDF) 2 Page - AVAGO TECHNOLOGIES LIMITED |
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ADNS-6130-001 Datasheet(HTML) 2 Page - AVAGO TECHNOLOGIES LIMITED |
2 / 16 page 2 Left Button ADNS-6000 Optical Mouse Sensor Wheel Button Right Button Z Optics Sunplus SPCP825A USB Controller USB interface MISO MOSI SCLK NCS D+/D- SCLK/SDATA VREG 1.3k Ohm Avago Technologies Firmware Configurable GPIO The reference firmware is configured to use the GPIO pins as shown on the schematic in Appendix A. However, it may be more optimal to use a different I/O configuration to meet the mechanical constraints of PCB design. The reference firmware is designed to be easily configured to another set of pin connections. This is accomplished through changes in the I/O definitions at the beginning of the SPCP825A_A6000.asm listing. The following state- ments are the pin definitions as they exist today. The firmware will use these definitions to read and configure the GPIO pins, without any other modifications. Communications between the Sunplus SPCP825A and the ADNS-6000 are done through the integrated SPI interface. The serial port cannot be activated while the chip is in power down mode (NPD low) or reset (RESET high). When the SPI is enabled thru PB0 (NCS), the PB2 (SCLK), PB1 (MISO) and PB3 (MOSI) GPIO pins serve special functions to enable the SPI interface to talk with external hardware. During normal operation, the Sunplus SPCP825A SPI is always configured as a Master to output the serial clock on PB7. Therefore, the USB microcontroller always initiates communication. Data sent by the ADNS- 6000 optical sensor is received on the PB1 (MISO), and data is shifted out to the ADNS-6000 through the PB3 (MOSI). See the schematic in Appendix A. When writing to the ADNS-6000, the microcontroller drive both the SCLK and the MOSI lines. When reading from the ADNS- 6000, the microcontroller drives both the SCLK and MOSI lines initially. After tSRAD delay, the ADNS-6000 will drive Figure 1. Sunplus SPCP825A - ADNS-6000 Optical Mouse Hardware Block Diagram Hardware Implementation The standard hardware to implement a mouse is shown in Figure 1. For X and Y movement, the optical sensor is used. The Z- wheel movement is detected by a set of optical sensors that output quadrature signals. For each button there is a switch that is pulled up internally by the built in pull up resistors. The D - line is pulled up via a 1.3k ohm resistor connected to the VREG pin. |
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