topic I2C failure in 8-bit Microcontrollers https://community.nxp.com/t5/8-bit-Microcontrollers/I2C-failure/m-p/463088#M21698 <HTML><HEAD></HEAD><BODY><P>I2C Failure.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>We’ve<BR />experienced a situation in our system where the I2C interface was showing<BR />intermittent failures. We’ve discovered that the hardware was performing with<BR />logic levels that were just barely within the electrical specs for the<BR />MC9S08SH32 CPU. The consequence in software was that the CPU could jump to<BR />random places in the code with no control over it Code Warrior. In some cases,<BR />the watchdog would eventually reset the system. We’re using the InternalI2C<BR />Processor Expert component in polling mode.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>We’ve<BR />addressed the hardware issue and the system is much more stable. However I<BR />would like to know if this is possible for the Processor Expert InternalI2C<BR />component to become upset in the presence of unreliable hardware to the point<BR />where the application software gets lost. Should we used a different operating<BR />mode for the I2C component to ensure a more predictable behavior in case of<BR />hardware failure ?</P></BODY></HTML> Mon, 30 May 2016 15:00:16 GMT caroltrudel 2016-05-30T15:00:16Z I2C failure https://community.nxp.com/t5/8-bit-Microcontrollers/I2C-failure/m-p/463088#M21698 <HTML><HEAD></HEAD><BODY><P>I2C Failure.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>We’ve<BR />experienced a situation in our system where the I2C interface was showing<BR />intermittent failures. We’ve discovered that the hardware was performing with<BR />logic levels that were just barely within the electrical specs for the<BR />MC9S08SH32 CPU. The consequence in software was that the CPU could jump to<BR />random places in the code with no control over it Code Warrior. In some cases,<BR />the watchdog would eventually reset the system. We’re using the InternalI2C<BR />Processor Expert component in polling mode.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>We’ve<BR />addressed the hardware issue and the system is much more stable. However I<BR />would like to know if this is possible for the Processor Expert InternalI2C<BR />component to become upset in the presence of unreliable hardware to the point<BR />where the application software gets lost. Should we used a different operating<BR />mode for the I2C component to ensure a more predictable behavior in case of<BR />hardware failure ?</P></BODY></HTML> Mon, 30 May 2016 15:00:16 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/I2C-failure/m-p/463088#M21698 caroltrudel 2016-05-30T15:00:16Z