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Re: timing bus status / reset network Flash mode on MCM




Hi,

The MCM contains a reset circuit with approximately 200 ms delay.
You need to hold BS0-BS3 at the correct levels until the reset
circuit has timed out. Note that this applies to the MCM, not the
stand-alone ETRAX 100LX.

Per Zander

On Wed, 19 Nov 2003, girerd wrote:

> Hi,
> 
> We want to control the external reset and bus status BS2 in order
> to put the MCM in network flash mode,  we didn't find the timing
> specification of reset and bs2 signal. We try the timing below but
> it just do a reset. When we do this sequence manualy with push buttons
> it works but the timing are around on second ... we'd like to know
> which are the minimum required ?
> 
> reset           ---------------         -----------------
>                       3.3             |    0  |                3.3
>                                          -----
>                                 10 us  10us         20 us
>                                 <---><---><------------->
>                                 ----------------------------
>                      HZ      |                                         | 
>                            HZ
> BS2            ---------                         3.3            
> -------------------------------  
> 
> 
> BS0 = 0
> BS1 = 0
> BS3 = 3.3
> 
> Best regards,
> 
> Claude
>