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Rockbox mail archiveSubject: Re: H3x0 ISP1362 (usbotg) chip connectionsRe: H3x0 ISP1362 (usbotg) chip connections
From: Peter D'Hoye <peter.dhoye_at_telenet.be>
Date: Sun, 19 Feb 2006 21:36:19 +0100 > Knowing the schematic can be a great deal of help, > but I suppose it's a hassel to disect a player. > > A0 as far as the Coldfire is concerned is for byte > addressing, on a 16bit bus, thus excluded. > A0 on the ISP1362 should be for word addressing > since it has a 16bit bus. > > Thus Coldfire <=> ISP1361 > A1 <-> A0 > A2 <-> A1 > > Which should make it transparent on the bus as > 16-bit "memory". > > Though read/write is a hassle since the coldfire is > R/!W while the ISP1362 has !R and !W signals. > Presumably a solution like for the h300 LCD is used, > thus an Address pin might be used as !R while R/!W > is connected to !W. > > Hope this helps, now sleep. > /Anders I resorted to writing a scanner that tries all possible combinations, (0x0 -> 0xF for both cmd and data) no luck so far :( I read 0x0, 0x1000 and 0x27 in all its combinations (0x27 is the reg number I write to the cmd reg) any more hints? thnx, Peter Received on 2006-02-19 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |