Assuming that HRESET and PORESET are properly driven per data sheet requirements by external hardware, will the '8260 reliably recover from "brownout" conditions on either power supply rail (3.3V or 1.9V).
We know that some devices such as PLDs or FPGAs may have data sheet limitations on dips on the supply rails. We do not suspect a problem with the '8260 but are trying to determine if our power supply design is good enough. In our case, PORESET will reset the CPU whenever either rail is out of tolerance, and HRESET will release it from reset after a suitable delay following return of both rails to proper voltages.
Message was edited by: TOM MCTAGGART