These quickly and reliably load program code into manufactured 8051 chips already mounted in their final circuit board systems. “SMH Technology’s drive to combine innovative thinking and significant ...

0] and P2[7..0] interface inputs the current 16-bit address from the 8051, latches it, and outputs it as the address bus A[15..0]. The data from the program memory, D[7..0], is input and flows through ...

To program these chips, [Aaron] first had to wire up the microcontroller into a circuit. This was just a ... This is a fairly standard 8051 core, so writing the code is relatively easy.

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[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.