Renesas Electronics, 8bit 78K0S, 78K Microcontroller, 6MHz, 16 kB Flash, 44-Pin LQFP

The 78K Families of Microcontrollers by Renesas are suitable for a wide range of applications.
The UPD78980x is an 8-Bit microcontroller with a 78KOS CPU core aimed for PC peripheral applications with USB1.1 function. Applications include USB keyboards and automotive electrical equipment.

Key Features:
On-chip USB functions
•Implements a USB (Universal Serial Bus) by connecting to hub and host
•Transfer speed: 1.5 Mbps (at 6.0 MHz operation with system clock)
Built-in on-chip regulator (VREG = 3.0 V - 3.6 V)
On-chip key return signal detector