Internal pull-up resistors not really effective
Hello,
I use a lot of Single Board Computers and the point is that when I use internal pull-up/down resistors, I always have spurious floating input with spurious push button. (true on Raspberry Pi and ODROID)
Now, on SBC, I always use external level resitors.
On the UpBoard, on the pinout wiki page, we can see :
The SoC GPIO pins include configurable internal pull-up resistors, but these are not really effective when the level translators are configured in input mode. If pull-up or pull-down resistors are needed for stabilizing floating input signals on a header pin, the user would need to include these in the external circuit connected to the UP board.
I is the first time I see this "not effective pull-up resistor" and I am curious to understand why is it not effective.
From Caliban Midi : Artistic robot maker.
Tagged
Categories
- All Categories
- 63 Announcements & News
- 139 Product News - New Product/Product Change Notice/ End-of-life
- 112 Welcome Developers!
- 60 Unboxing & Project Sharing
- 114 Tech Updates
- 3.6K UP Products
- 119 UP 7000
- 25 UP Squared i12
- 24 UP Xtreme i12
- 14 UP Squared Pro 7000
- 1 UP Element i12 Edge
- 24 UP Squared V2
- 65 UP 4000
- 23 UP Xtreme i11
- 34 UP Squared 6000
- 59 UP Squared Pro
- 135 UP Xtreme
- 820 UP Squared
- 1.4K UP Board
- 74 UP Core Plus
- 217 UP Core
- 3 UP Xtreme Lite
- 40 UP AI Edge
- 265 Starter Kits & Peripheral