Description: MK4501N-12 is a high-speed 4-bit microcontroller (MCU) manufactured by STMicroelectronics. It is based on the 8-bit MCS-51 core and is designed for low-power applications.

Features:
8-bit MCS-51 core
Up to 12 MHz clock frequency
Low power consumption
Up to 4K bytes of program memory
Up to 128 bytes of RAM
Up to 128 bytes of EEPROM
Up to 32 I/O lines
Up to 2 16-bit timer/counters
Up to 2 serial ports
Up to 4 interrupt sources

Applications:
Automotive
Industrial
Home appliances
Security systems
Medical devices
Consumer electronics(For reference only)
https://www.utsource.net/itm/p/51210.html