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

I have the SX28 attached to my board.
Now I want to be able to use  in-system programming.

 

The first thing I did is add  SX-Key compatible pins on the board.

As on-board clocking I am using a 25Mhz crystal.

 

My concern is: what should I do with the on-board clock when I am going to program the device using SX-Key?

 

Should I remove the on-board clock ?

 

How people deal with this? 

Do you use any kind of jumper settings or something to disable temporary the on-board clock or you remove physically the clock source?

 

If the answer is to remove the on-board clock, is it safe to connect a crystal using a socket? 

 

I have taken a look at SX Protoboard that allows a lot of clock configurations but in the manual there is no indication on how to deal with this issue.

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