This part is a kind of semiconductor called AT80C52.Function of this product has CMOS 0 to 44 MHz Single-chip 8 Bit Microcontroller. Manufacturers : TEMIC Semiconductors Image and pinout : Some of the text within the PDF file : [ ... ] AT80C52 PDF Datasheet Download Metablog 2017/11/07 11:58 2017/11/07 11:58