Inital Design Goals
For this project, I am desiring to design a custom PCB board that will be completely integrated with the following key features
- Wifi
- Bluetooth
- SD Card Reader
- DDR3L
- HDMI Port
- Capacitive Touch Screen Interface
- USB x3
- Stereo Audio
- Audio AUX out
- Audio Microphone
- Status LED
- Linux based operating system
System Level Design
The following is an early stage system level block design.
Early Stage Physical Design
Designed using SketchUp, the following is an early stage physical design to estimate the board size and get and understanding of the physical requirements of the desired system. The end goal is a plug in device that is able to hang on a wall or sit on a desk. It has stereo audio using 2 independent speakers. It will also have the ability to drive an audio reciever using a headphone jack. A LCD display will be embedded in the device, allowing to display physical content to the end user.
Part Selection
The following components are planned to be used in this project:
- TI Sitara ARM® Cortex®-A8 32-Bit - AM3358
- WiLink™ 8 single band combo 2x2 MIMO Wi-Fi®, Bluetooth® & Bluetooth Smart (Low energy) module - WL1835MOD
- Alliance Memory: IC SDRAM DDR3 128M X 16 96-FBGA - AS4C128M16D3L-12BIN
- IC HDMI TRANSMITTER 64-HVQFN - NXP TDA19988
- Closed Loop I2S Input Amplifier with Power Limiter and Integrated Headphone, PVDDmax of 16.5V - TAS5760LD
- MEMS Microphones DIG MEMs Mic, BP w/ I2S output - SPH0645LM4H-B