Re: A question about MPC850 reboot
- From: gvarndell <gvarndell@xxxxxxxxxxx>
- Date: Thu, 24 Jul 2008 13:46:27 -0700 (PDT)
On Jul 24, 11:11 am, wylg <wyl...@xxxxxxxx> wrote:
Hello,
Recently,we debug a board.There is a MPC850 chip on our board.The
type of our MPC850 chip that we use is XPC850SRZT50BU.Now we meet a
problem about MPC850 reboot.Below is the details:
1.We use vxWorks as our operation system.Sometimes we need use the
function 'reboot' to reboot the MPC850 chip.When we reboot about 10
times,we found that the MPC850 chip is still in reset state.The HRESET
signal is still asserted and the CLKOUT signal is not correctly
locked,so the MPC850 cannot work continue.
2.There is a watch dog chip on our board.Sometimes we need use watch
dog chip to reset our MPC850.The watch dog chip will assert MPC850's
POREST signal when it isn't fed within 1.6 second.The result is very
similar.When we reboot about 10 times,we found that the MPC850 is
still in reset state.But in this situation,the HRESET signal is
negated,the CLKOUT signal is not correctly locked.
In both two cases above,if manully reset the board,then everything is
OK.
Could you tell me where is the problem ?
Even though traffic has dried up to nearly nothing,
comp.sys.powerpc.tech might be a better place for this kind of
question.
As far as I can tell, it has nothing to do with vxWorks.
HTH
GV
.
- References:
- A question about MPC850 reboot
- From: wylg
- A question about MPC850 reboot
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