Other Devices / Features

• UART: serial port commonly available on most microprocessors (especially microcontrollers)

  • Often requires additional circuitry to match voltage levels.
  • Can be useful for communicating between devices

• PAL: Programming Array Logic

  • Little bits of glue circuitry are common. To invert signals, to select and enable chips...
  • PALs are programmable bits of glue. you can make them into just about any little collection of gates.