Hi!, I'am facing with a problem. I'am designing a Secure Digital SD (memory, IO) Card device controller, The condition is that clock to the SD CARD comes from the SD Host only, and no other source. This being the case the specification says that even if the Clock supply to the SD card is stopped the programming into the FLASH Memory does not stop. Now how can programming be done without a clock. I agree that FLASH does not need any clock for programming but the problem is the related signals that goes into the FLASH (CE#, OE#, CLE#, WE#, CIO#) all will work W.R.T the clock. Please can anyone help ? Thanks in advance Pranesh --------------------------------- Do you Yahoo!? Yahoo! Small Business - Try our new resources site! -------------- next part -------------- An HTML attachment was scrubbed... URL: http://www.opencores.org/forums.cgi/cores/attachments/20050314/49d899df/attachment.htm