[SI-LIST] Re: XTK model for I2C bus
- From: steve weir <weirsp@xxxxxxxxxx>
- To: diggidydog2003@xxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Tue, 01 Apr 2003 05:19:02 -0800
Doug,
Did you remember to instantiate the external pull-up resistors in your
model? If they are missing, your driver will be stuck at constant 0V just
like the error message reports.
Regards,
Steve.
At 05:32 AM 4/1/2003 -0500, SI Eng wrote:
>Gurus :
>
>I'm trying to simulate a heavily loaded I2C bus (2 wire serial bus) with a
>mixture of I2C and non I2C input devices on it. I can't get XTK to
>correctly translate the IBIS model of the I2C I/O - I think there's some
>input filtering and spike suppression circuitry on the I/O that it doen't
>like. When I run ibis2xtk, the resulting XTK model gives erroneous results
>when I try using it. The log file states the following problems :
>
>INFO: Removing constant voltage segment at 0V [1]
>
>ERROR: Constant voltage segments (Removed 1) found in GND_Clamp curve
>
>Any ideas ? The IBIS model in question is the Philips PCA9556.
>
>Thanks,
>
> Douglas
>
>
>
>
>
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