Wu Minghua

About usbtap used on mpc8241 board problem-help me!!!!!!

Discussion created by Wu Minghua on Apr 29, 2007
Latest reply on Apr 30, 2007 by Thierry Giraud
I'm now having a problem where I can only see 1/2 of my SDRAM.
My board cpu is mpc8241 and mpc8241 have 32bit data bus connected to sdram that is composed of two 16bit  width data bus chips.I try to use codewarrior and usbtap to connect this board and find  can only see 1/2 of my SDRAM,what is the reason  of phenomenon? I can sure the initialization files is connect.
 
In this forum,i find a guy had ecounted the same prolem as me ,but no answer.
whether is the data  width that usbtap access to cpu though JTAG at a time  is eight???? Please give me answer,
 
Address       data     
00000000   749e8778 00000000 7cdc3378 00000000
00000010   3B000000 00000000 480037DD 00000000
 
Can usbtap support 32bit width data bus of sdram????? I have spended a lot of time to find out the solution,but i fail ,please help ,thanks!!!

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