Jump to content
Sign in to follow this  
ConfusedCoder

MSP430F5529 LPM Questions

Recommended Posts

Hi, I was working on interfacing my MSP430 with a 4x4 keypad and I stumbled upon this application report.

Then I looked into the specific low power modes of the F5529 and noticed that there was a LPM4.5.

The application report uses LPM4 as it isn't the same device, and I was wondering if it was possible to use LPM4.5 as the device was waiting for keypad input as my goal is to minimize power usage. 

Share this post


Link to post
Share on other sites

You would need to take a look at the documentation for the F5529 to verify that it can be awakened with a GPIO interrupt.  In a very deep sleep, IIRC, the list of available interrupt sources gets shorter.  So if LPM4.5 supports a GPIO transition as a wakeup source you should be good to go.

Share this post


Link to post
Share on other sites
7 hours ago, dubnet said:

You would need to take a look at the documentation for the F5529 to verify that it can be awakened with a GPIO interrupt.  In a very deep sleep, IIRC, the list of available interrupt sources gets shorter.  So if LPM4.5 supports a GPIO transition as a wakeup source you should be good to go.

On page 51 of the data sheet for the F5529, it states "Wake-up signal from RST/NMI, P1, and P2" listed under the Low-power mode 4.5 section. That confirms it as an option for what I'm trying to implement, right?

 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...