A while back, [Matt] bought a few 8051 MCUs and tucked them away for ... you realize this 30-year-old chip has 32 IO pins. This microcontroller, along with its bigger brother the 8052, served ...

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 ...

This paper describes the design and implementation of a version of the 8051 microcontroller, one of the most commercially used microcontrollers in FPGA with reconfigurable instruction set.

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 ...

This chapter contains an overview of the parallel I/O subsystem of the HC11, AVR, and 8051 microcontrollers, from a hardware and software perspective. 2.2 Overview of the Parallel I/O System The ...