回复： RE: about MPC555 PCB

hi,dir Allan,
  Firstly thanks your help!
  I just do according to your suggestions.But  it dstill doesn't work.
  Here I am trying to describe my steps to you,( All these are finished in the visionclick  7.0)  
  1.Select the “00: MPC555 K1,2,3,M ( 448 x 8 ) 1 Device” Driver.
  2.Use internal RAM workspace starting at 0x003F9800.
  3.Set physical flash Base Address to 0x0.
  4.PREPARE the special *.BIN file and specify its path and file name.
  5.enable VPP to 5v, epee t0 3.3v  rstcnf* connected to sreset* , and force Sys.Clock to 40MHz.
  6.Click on “Erase-only”. This will erase BOTH Shadow and Main Arrays.
  7.manually set CMFMCR_A SIE bit to “1” in target beforehand. Program data into Shadow array (256 bytes), After completion, return the bit to “0”.
   8.check that the CMFMCR_A SIE bit is
set to “0”Program data into Main array (448K-bytes), here the speed is much slow and reach to 3 minutes(too long). But it come to success in programming the flash.
   After i finished these, and connected the power again, the board doesn't work.(by the way, the file burning to the board has been tested in the estsbc555 demo board, so i think the program is right!）
   Here i suspect that the problem comes from the board? But the power. the clock, is right.
   What can i do? here I send you the .sch, and .pcb and .reg files to your email, hope you can find something in these!
   Thank you so much!
 
 Best regards!
  wupegasus 

Dobbin Allan-r11834 <[email protected]> 写道：
In mail bekow, I meant to say reprogram shadow keeping DBPC at '0'.  For DBGC, try 00 or 10.

Regards,
Allan

-----Original Message-----
From: Dobbin Allan-r11834 
Sent: Wednesday, August 10, 2005 10:35 AM
To: '[email protected]'
Subject: RE: [MPC500] about MPC555 PCB


Assuming you clocks, power and reset is/were correct, I suspect you've programmed the reset config word in shadow. In particular, the DBPC and DBGC bits may have been inadvertantly set to '1'.

Assuming you have a pull-up on RSTCONF, pull it LOW at power-on reset (i.e. short it to GND or through a 100ohm resistor). Hopefully you will now have your BDM connection back. Now erase block 0 including the shadow row, reprogram your block 0 and then reprogram the shadow row keeping DBOC '1'.

Let me know if this works.

Regards,
Allan

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of wupegasus
Sent: Wednesday, August 10, 2005 8:31 AM
To: [email protected]
Subject: [MPC500] about MPC555 PCB


Here I meet some problems about the MPC555 PCB design. My software 
tools is Visonclik 7.0 and my question is that: The board can go into 
the “BDM“ mode and I still can program the internal flash, but after 
that, it would't works at all. 
    Now two weeks have passed, I still can not find the problem. So, 
here I would appreciate much if someone can give me some hints about 
this.
  By the way, how can i attach my SCH file and  its corresponding PCB? I think maybe some one can find my faults in these.

  thanks! 




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