MC9S08SH8:I can enter in Stop3 mode but not in Stop2

[diegocolombo]

Kind support and community users

i'm evaluating MC9S08SH8 power consumption and behaviours in Stop3 and Stop2 modes.

Stop3 mode looks running,when entered the current consumption of my circuit(uC plus some low power peripherals) drops from 9 mA to 45 uA.

This does not happens launching Stop2.The  current consumption remains in the mA range

I am using Processor Expert to select the mode,the bit PPDC is write once,and i verify that PPDC=1 before running the "STOP" instruction,The other bits are conformed to table 3-1 of the datasheet .

What else should i check?

Thanks

Diego

[diegocolombo · Accepted solution]

It is my fault,sorry

The RESET/IRQ pin was left accidentaly floating.

Measuring the voltage it is low,so the IRQ is asserted,and this wakes the uC immediately or avoid that it enters i STOP2

Resoldering the pullup resistor makes it work correctly

[vicentegomez]

Hi Diego

I glad to hear that your problem is solved.

If you have more problem, just let me know

Regards

Vicente Gomez

[diegocolombo]

Thanks very much,Vicente

Diego