Solar Telematics System PCB Layout and Design Presentation Craig Lechlitner Brian Kelley Clayton Dickemann Dan Ehrman

Block Diagram

PSSCs An ability to track vehicle location using GPS. An ability to receive and send CAN messages from and to other systems in the car. An ability to display graphics on the LCD display. An ability to respond to user input from a touchscreen. An ability to store and load data to and from non-volatile memory.

Preliminary Layout

Power Supply Layout considerations Minimize length of high current traces Use wider traces for 3.3V supply (>50mil for 3A) Minimize vias between inductor, diode, switch, and capacitor. Place fuse close to Vin. LED backlight driver

Microcontroller Layout Considerations Place decoupling capacitors on opposite side from microcontrollers, as close as possible to Vdd pins. Place crystal oscillator and capacitors as close as possible to PIC32 and MCP2200. Keep high frequency signals (96 MHz) short. Graphics controller SRAM LCD connector Place vias on all data lines for probing.

Misc Layout Considerations Line up ribbon cable connectors to match LCD Place commonly used connectors away from board edges so all wires exit through hole in housing. Power CAN Audio Telemetry data Place infrequently used connectors next to edge to save board space Programming headers. External switches (only used as a backup for other systems).

Questions?