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About reboot of P1010 CPU

Question asked by masaaki uno on Sep 1, 2014
Latest reply on Sep 10, 2014 by Yiping Wang



When rebooting P1010, hardware carries out the following.

1.P1010 asserts a HRESET_REQ signal.

2.If HRESET_REQ is asserted, HRESET_B will be asserted in a circuit and the signal will be inputted to P1010.

3.If a HRESET_B signal is asserted, P1010 will negate a HRESET_REQ signal.
It is above.

However, there was a case where it did not operate normally after reboot even if it performs the above.

I attach the file which showed timing.

I think that there is the cause when HRESET_B is asserted immediately, after HRESET_REQ is asserted.
Although regulation of the timing of a HRESET_REQ signal and HRESET_B considers not being written to a datasheet by it, is it right?
Are there any other factors?


Best Regards,