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With regards to BF592 EXTCLK pin

Question asked by wallman16 on Jan 10, 2012
Latest reply on Feb 9, 2012 by Prashant

Hi ,

 

Data sheet states

[All pins are three-stated during and immediately after reset,with the exception of EXTCLK, which toggles at the system clock rate.

Adding a parallel termination to EXTCLK may prove useful in further enhancing signal integrity. Be sure to verify overshoot/ undershoot and signal integrity specifications on actual hardware.]

 

But on checking the manual VR_CTL registers Reset Values is 0x 3000 which is EXTCLK_OE is cleared and manual also state

[When EXTCLK_OE is cleared, the EXTCLK pin is three-stated]

 

Which is correct is it Three stated or is it Toggling at SYSTEM CLOCK RATE(SCLK ) on and after RESET .

 

And what is correct termination if the function is not used  as Data sheet and manual is confusing .

 

Thanking you

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