The 8051-compatible microcontrollers are equipped with up to two inputs that may be used as general-purpose interrupts. A simple way to increase the number of interrupt inputs is shown in the ...

The program in Listing 1 uses a pseudo-RETI instruction to provide a five-priority-level interrupt system for the 8051P microcontroller. The ...

The DS89C4x0 single-cycle 8051 processors come with flash memories up to 64 kbytes. They can be programmed by an application. The devices also include two full-duplex UARTs, 13 interrupt sources with ...

[Andrew] picked up a handful of these big STC 8051 chips for a song and dance. The problem he has with them is the clunky VB6 programming software that only wants to run on a Windows box. He ...