Re: PWM-J1850

Ok cool.
This information is great!

I would like how I can work with the signal PWM. For example, I know
at BUS+ = inverse BUS-, right. Now how I work with pulse. Are 1's and
0's depending on duty cicle?

Thanks

--- In opendiag@yahoogroups.com, "ECU dev" <ecu.dev@...> wrote:
>
> PWM uses pulse widths to indicate the symbols in the transmission.
>
>
>
> The following apply to PWM at 41.6kbps:
>
>
>
> Active Phase "1" : 7 uSec
>
> Active Phase "0" : 15 uSec
>
> Bit time: 24 uSec
>
> SOF/EOD time : 48 uSec
>
> EOF time : 72 uSec
>
> IFS Time: 96 uSec
>
> Active SOF : 31 uSec
>
> Active BRK : 39 uSec
>
> BRK to IFS time: 120 uSec
>
>
>
> (from http://www.kbmsystems.net/SAEJ1850.htm)
>
>
>
>
>
>
>
> -----Original Message-----
> From: opendiag@yahoogroups.com [mailto:opendiag@yahoogroups.com] On
Behalf
> Of mdeain
> Sent: 21 June 2007 15:00
> To: opendiag@yahoogroups.com
> Subject: [SPAM] [opendiag] PWM-J1850
>
>
>
> Hi all
> Please,
> I need more information about PWM. How protocol work? How hardware
of
> PWM work?
>
> Thanks
>
>
>
>
>
> [Non-text portions of this message have been removed]
>

 
Received on Mon Jun 25 04:07:26 2007