This part is a kind of semiconductor called ADAM42P1116.

Function of this product has 4-BIT SINGLE-CHIP MICROCONTROLLERS.

Manufacturers : ETA CHIPS

Image and pinout :

Some of the text within the PDF file :

4-BIT SINGLE CHIP MICROCOMPUTERS ADAM42X11XX USER`S MANUAL • ADAM42P1120 • ADAM42P1116 • ADAM42C1116 • ADAM42P1108 • ADAM42C1108 Ver 1.3 EETTAACCHHIIPPSSCCoo..,,LLttdd.. 0. REVISION HISTORY Version Date VER 1.0 2007.06.25 -. Public Release. Description VER 1.1 2008.08.11 -. Remove the PG option of the Configuration Option bit. VER 1.2 -. Add the Mask ROM Version (ADAM42C11XX) 2008.12.18 -. Add the description of using the bit access instruction for I/O data register. -. Add the caution about using two INT1 pins. VER 1.3 2009.06.05 -. Add the package type of 20TSSOP. (ADAM42P1120T) ADAM42X11XX User's Manual (V1.3-2009.06) 1 1. OVERVIEW The ADAM42X11XX is the high speed and low voltage operating 4-bit single chip microcomputer. This chip contains ADAM42 core, ROM, RA [ ... ]

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