The new Single-Wire On-chip Rapid Debugging (SWORD™) interface for the R8051XC2™ microcontroller core connects the 8051 to its debugging unit with just one IC debug port. The popular Joint Test Action ...

The Super-Fast 8051 Microcontroller IP core implements a high-performance ... Software development is facilitated by a single-wire or JTAG debugging interface, which operates seamlessly within IDEs ...

[Andrew] picked up a handful of these big STC 8051 chips for a song and dance ... We think this is to make it easy to interface your own hardware programmer with the software.

Choosing a microcontroller is a matter of convenience, but it doesn’t have to be this way. There are dozens of different ARM cores alone, hundreds of 8051 clones, and weirder stuff including the ...