General Description
The a6402 MegaCore function implements a universal asynchronous receiver/transmitter (UART), which provides an interface between a microprocessor and a serial communications channel. See Figure 1.

Features
■ a6402 MegaCore function implementing a universal asynchronous
   receiver/transmitter (UART)
■ Optimized for FLEX® and MAX® architectures
■ Uses approximately 162 FLEX logic elements (LEs)
■ Programmable word length, stop bits, and parity
■ Full duplex operation
■ Includes status flags for parity, framing, and overrun errors
■ Functionally based on the Harris HD-6402 device, except as noted in
   the “Variations & Clarifications” section on page 63