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2005-07-13 by gmaderecker
hi all, i will use the LPC2292 with external memory. In data sheet is noted, that PORT2 pins use internal pull ups then input function is used. Are therefore external pull ups neccessary for the external bus devices? Thank for you answer Georg
2005-07-13 by Leon Heller
----- Original Message -----
From: "Weidner, Detlef" <detlef.weidner@...> To: <lpc2000@yahoogroups.com> Sent: Wednesday, July 13, 2005 9:14 AM Subject: AW: [lpc2000] pull ups on external data bus Hi, I asked philips for the value of the pull ups. They didn't tell me the value, they only said that they are very weak pull-ups. It seems to be some kind of secret at philips... We decided to use external pull ups to get no bad surprises in future. Perhaps the value could be measured by enabling one, driving it low and measuring the current to the supply. Probably 100k or something like that. Leon --- [This E-mail has been scanned for viruses but it is your responsibility to maintain up to date anti virus software on the device that you are currently using to read this email. ]