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CEO Interview with Tom (TJ) Jackson of Softchip

22 d ago

In the summer of 1978, a small Intel team began designing the 8051, an 8-bit microcontroller launched in 1980 as a more flexible successor to the 8048. It featured an easier instruction set, more memory, two 16-bit timers, a UART, a Boolean processor, and four bank-selectable register sets for low-overhead interrupt handling. Initially used in keyboards, appliances, toys, and automobiles, the 8051 became ubiquitous despite its modest 12 MHz clock and 12-cycle instructions, thanks to low power and efficient real-time control. Billions shipped, and the architecture remains embedded in countless devices today. CAST has offered 8051 IP cores since 1998. Newton Abdalla, CAST’s VP of Operations, notes that power-performance-area (PPA) efficiency makes the 8051 still competitive: it occupies 50% less silicon than a minimal 32-bit core, uses less power and leakage, yet delivers higher DMIPS/MHz than the original. CAST’s royalty-free licensing has attracted over 300 licenses, with cores used in new projects like battery management, USB-C controllers, Bluetooth, sensors, and automotive SoCs. CAST’s 8051 family includes four lines (a fifth upcoming). The high-performance S8051XC3 runs up to 880 MHz, offering a 26.85x DMIPS/MHz increase. The mid-range R8051XC2 reaches 1 GHz with a 12.1x boost. The ultra-small T8051XC3 requires only 4,400 gates, ideal for low-leakage battery pack management. The legacy L8051XC1 provides binary compatibility. The soon-to-launch FS8051XC3 is a dual-lockstep core for functional safety. All cores are synthesizable for ASIC/FPGA and supported by Keil and IAR tools. According to Abdalla, the 8051 remains a better fit than larger 32-bit processors for many low-power, small-area, fast-interrupt applications.