[ts-7000] bugs on the on board watchdog timer

[anand bhavnani <>]

hi all,

i had sent a query to the group some days back. i haven't recieved a reply.
i would be grateful if someone can answer it.

1st  query:-

Is it that the 32khz input to the cpld is for the operation of the watchdog timer?

2nd query:-

it is in the message forwarded

Regards,
Anand.




" MINDSET: Its Everything " Anonymous

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To:
Subject:	Re: [ts-7000] watchdog timer
From:	anand bhavnani <>
Date:	Tue, 7 Mar 2006 00:15:59 -0800 (PST)

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.
>  >
>  >
>  > " MINDSET: Its Everything " Anonymous
>  >                  
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