In SX Microcontrollers, SX/B Compiler and SX-Key Tool, g_daubach wrote:

Hey all,

when testing my SX48DIP module, I came across the famous "chip connection failed" error message.

For testing, I had inserted an SX48DIP module in the breadboard area of a Parallax PDB, hooked up wires to Vdd and Vss, installed a 4-pin header for the SX-Key on the breadboard, and connected it to Vdd, Vss, OSC1, and OSC2, as usual, just to end up in a "chip connection failed" error when trying to send a program to the SX48 with the SX-Key.

The reason was simple enough but it took me a while to find out: I forgot to tie the MCLR pin to Vdd. Shame on me !!!

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