This part is a kind of semiconductor called A6402.

Function of this product has Universal Asynchronous Receiver/Transmitter.

Manufacturers : Altera Corporation

Image and pinout :

Some of the text within the PDF file :

a6402 ® Universal Asynchronous Receiver/Transmitter Data Sheet September 1996, ver. 1 Features s s s s s s s 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 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. Fig [ ... ]

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