what is the procedure to handle unused port pins of part MC9S12XET256MAG ?
‎08-15-2017
02:27 AM
774 Views
kumara
Contributor I
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I am working on automotive products with the controller MC9S12XET256MAG? What is the procedure to handle unused port pins? I am expecting software solution ...
2 Replies
‎08-15-2017
09:37 PM
613 Views
lama
NXP TechSupport
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
The http://www.nxp.com/docs/en/application-note/AN3262.pdf written for S12XD family devices can be used to better understand design. Of course, there are some differences between devices but the HW design is almost the same and technical approach is common.
The Chapter 14 describes Managing Unused Pins.
Best regards,
Ladislav
‎08-15-2017
12:17 PM
613 Views
danielmartynek
NXP TechSupport
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Hi,
Unused pins can be configured as inputs or outputs. But because internal pull resistors are active only in the input mode, it is better to set them as inputs and enable pullups. Many pins have pullups enabled by default, out of reset.
Regards,
Daniel