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 Clarification on CARDBIRQ		  Forum Locked
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mwmock

8 Posts
Posted - 06 Sep 2003 :  14:44:19  Show Profile  Email Poster
When used as an interrupt, BitsyX User Manual Rev 2 shows CARDBIRQ (J9-27) to be active high.

Personality Board Schematic (J9-27 and J28-37) shows CARDBIRQ to be active high.

"Using the CompactFlash(CF) Interface..." ADS doc#110010-00083 shows J9-27 /IRQ to be active low.

Can you clarify which is the correct sense of the interrupt?

(Independent research suggests active high: http://www.howell1964.freeserve.co.uk/parts/cf_pinout.htm pin 37 IREQ)

(I'm using the CF interface as an external data bus to access a device with an active low interrupt. I can't afford to get this backwards.)
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