In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Fe2o3Fish wrote:

A curious issue with using a resonator on the Prop-SX controller.
I'm new to the Prop-SX, SX, and the SX/B in general.

I have a 4-MHz resonator plugged into my Prop-SX board. I have a
simple candle program loaded into SX-Key 3.2.3 and I'm using SX/Basic.

The DEVICE & FREQ lines are:
DEVICE SX28, OSCXT2, TURBO, STACKX, OPTIONX
FREQ 4_000_000

Now, I select menu Run->Device. The following are checked
in the Device window: SX28, Browout Off, Crystal-XT2, Crystal Drive,
and Crystal Feedback, Turbo Mode, and Stack + OPTION.

LOOP:
I uncheck both Crystal Drive and Feedback (Drive goes into "ghost" mode)
and press the Program button. Everything goes OK there.

I now press the Verify button and it comes back "Device verifed OK".

Now when I press the Read button (this reads from the SX chip, right?)
and "Crystal Drive" becomes checked again so I go back to LOOP again. :-)

Alas, the same thing happens. I go ahead and download my program into
my Prop board and it appears to be working. Still, moving my mouse pointer
over the Crystal Drive checkbox pops up a little box that says
"Use DEVICE XTLBUFD". I look that up in the SX-Key manual and it doesn't
look like that's an option I want set when using a resonator.

Am I wrong here?

Where do I learn how to properly use a resonator and the appropriate
program directives and device configuration settings I need?

Thanks!

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