So, I then have a few questions left about this command define OSC:

1_The "DEFINE OSC 20" command would only make sense if you really use a 20mHz quartz?

2_With a 20mHz quartz, is the simple fact of configuring the fuse "OSC HS" sufficient? Or will we also have to add the DEFINE OSC 20 command in the program?

3_ The fact that the manual specifies that the DEFINE command can be used to change the predefined value of the oscillator makes you think that it is not necessary to use a quartz to actually work at 20mHz ...

4_ Without Quartz What would the impact of the DEFINE OSC 20 order? The timing unit for Pulsin, Pulsout and Pause commands would still be modified?


Thanks