Re: [ts-7000] watchdog timer

[anand bhavnani <>]

hi,

one of the posts on the group mentions that:

"A fix for this bug has been implemented for silicon revision E1." about the watchdog timer.

1:so in that case the boards with these processors would not need a watchdog on the CPLD?

2:Also if the on board watchdog is fine, then i think the 14-bit counter (4020)
is also a waste?? correct me if i am wrong.

3:how can one makeout whetther  a particular processor is of this make(E1)?

Yours,
Anand.



Curtis Monroe <> wrote:
>      The 32khz is an output from the CPLD to the Controller.
>  The 32khz input of the controller is suseptable to noise, so the CPLD provides 
>  it with a clean square waveform by dividing the 14.7456MHz clock by 450 to 
>  get 32khz. At the same time it uses this clock for the watchdog timer.!
>  
>  
>  -Curtis.
>  
>  
>  On March 6, 2006 04:44 am, anand bhavnani wrote:
>  > hi all,
>  > 
>  > thks jesse
>  > 
>  > is it that the 32khz input to the cpld is for the operation of the watchdog 
>  timer?
>  > can i disable the cpld's watchdog timer?
>  > can i totally do away with the watchdog timers on my board? in that case 
>  what will be the issues i  will face.
>  > 
>  > yours,
>  > Anand.
>  > 
>  > 
>  > Jesse Off <> wrote:     The on-CPU watchdog is broken 
>  and unreliable.  There is errata on 
>  >  the processor silicon itself for this.  The processor chip can't be 
>  >  relied upon to reset itself at all actually and the Linux kernel has 
>  >  been modified to use the external watchdog for software resets.  
>  >  
>  >  //Jesse Off
>  >  
>  >  
>  >  --- In
>   anand bhavnani <> wrote:
>  >  >
>  >  > hi all,
>  >  > 
>  >  > Curtis Monroe <> wrote:
>  >  > The CPLD does more than just NAND flash management. It also:
>  >  >        - handles control signals on the PC104 bus, 
>  >  >        - has a watchdog timer, 
>  >  > 
>  >  > the 9302 processor also has a watchdog timer, then why does the 
>  >  cpld have another watchdog timer.
>  >  > 
>  >  > good bye,
>  >  > Anand.
>  >  > 
>  >  > 
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