This part is a kind of semiconductor called D78F0535.

Function of this product has UPD78F0535.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

Preliminary User’s Manual 78K0/KE2 8-Bit Single-Chip Microcontrollers µPD78F0531 µPD78F0532 µPD78F0533 µPD78F0534 µPD78F0535 µPD78F0536 µPD78F0537 µPD78F0537D The µPD78F0537D has an on-chip debug function. Do not use this product for mass production because its reliability cannot be guaranteed after the on-chip debug function has been used, due to issues with respect to the number of times the flash memory can be rewritten. NEC Electronics Document No. U17260EJ3V1UD00 (3rd edition) Date Published August 2005 N CP(K) Printed in Japan 2004 [MEMO] 2 Preliminary User’s Manual U17260EJ3V1UD NOTES FOR CMOS DEVICES 1 VOLTAGE APPLICATION WAVEFORM AT INPUT PIN Waveform distortion due to input noise or a reflected wave may cause malfunction. If the input of the CMOS device stays [ ... ]

D78F0535 PDF Datasheet Download