Understanding the 8051 via Predko’s book gives you a mental model that applies to every microcontroller. The concepts of timers, interrupts, and serial ports are universal. If you master the 8051 from this PDF, you can learn an STM32 or an Arduino in a week.
To program the 8051 microcontroller, you will need a range of tools and software, including: Programming And Customizing The 8051 Microcontroller Pdf
Is the 8051 dead? Hardly. You will find 8051 cores embedded in: Understanding the 8051 via Predko’s book gives you