64KB FLASH Microcontroller, 8b Data Bus, 20MHz, SPI, PLCC-44
8-Bit MCU 64KB FLASH 20MHz 44VQFN I2C SPI UART
IC MCU 8BIT 64KB FLASH 44TQFP
64KB FLASH 8051 Microcontroller, 38 I/Os, I2C/SPI/UART, DIP-40