Problem with SMBus
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Problem with SMBus

 
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Lanarcam
Guest
Posted: Mon Jan 03, 2005 7:40 pm    Post subject: Problem with SMBus Reply with quote
We have a problem with an SMBus connection. Both signals clock and data are
stuck low on the slave side. the slave is a PIC16C. We tend to exclude a
software problem on the slave since all I2C status bits are tested and some
of the functionalities of the PIC are still available. We think that this is a
problem with the PIC I2C Hardware. It occurs randomly and can be reproduced
by injecting parasites on the bus.
My question is : have you met similar problems and found that the PIC hardware
was the cause ?
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Neil Kurzman
Guest
Posted: Tue Jan 04, 2005 7:57 am    Post subject: Re: Problem with SMBus Reply with quote
Lanarcam wrote:

Quote:
We have a problem with an SMBus connection. Both signals clock and data are
stuck low on the slave side. the slave is a PIC16C. We tend to exclude a
software problem on the slave since all I2C status bits are tested and some
of the functionalities of the PIC are still available. We think that this is a
problem with the PIC I2C Hardware. It occurs randomly and can be reproduced
by injecting parasites on the bus.
My question is : have you met similar problems and found that the PIC hardware
was the cause ?

I can not speak for the PIC, but a slave should reset itself after 35ms (a break)
according to SMBus spec.
ask Microchip about the PIC.
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