wakeup detection level in LPWFI mode

[llebotlan]

Posted on January 12, 2006 at 13:21

wakeup detection level in LPWFI mode

[llebotlan]

Posted on January 12, 2006 at 05:18

Hello,

I have problems to wake up my str710 when I am in LPWFI mode on the RTC. I am waiting a FallingEdge on the XTI15.

Is there a minimum time for the str to notice the edge.

Thanks,

Ludo

[tech9]

Posted on January 12, 2006 at 12:09

Hi Ludo,

here is a sample of my code; it might help you.

//Configure external interrupt

XTI_Init(); //initialize the XTI

XTI_LineModeConfig(XTI_Line15, XTI_FallingEdge); //Configure the line 15 mode ,select Falling edge trig

XTI_LineConfig(XTI_Line15, ENABLE); //Enable line 15 WAKEUP pin or RTC Alarm

You basically need to enable the external interrupts and mostly, enable the RTC alarm to be recognised as such, so it effectively wakes up the MCU. Consult the XTI section of the manual to see more capabilities from this module.

Hope this helps!

Regards,

Jp

[llebotlan]

Posted on January 12, 2006 at 13:01

Sorry, in fact my question was not clear.

My problem is not only to wake up the str but to detect short fallingedge.

Example : a strobe.

What is the minimum strobe length, the mcu can detect ?

Thank you,

Ludo

[llebotlan]

Posted on January 12, 2006 at 13:21

Sorry, in fact my question was not clear.

My problem is not only to wake up the str but to detect short fallingedge.

Example : a strobe.

What is the minimum strobe length, the mcu can detect ?

Thank you,

Ludo