The most efficient 8051 microcontroller core ever ... on a 0.35µm process up to 430MHz on 90nm – using around 10,000 gates in each case. 88% of opcodes are single instruction, average instruction ...

Other 8051-type microcontrollers are available from manufacturers such as Atmel, FTDI, and Maxim. The internal Flash program memory in such devices is typically not externally extensible and is often ...