Forum Discussion
Occasional ContributorAbout MAX10 IO pin pull-up
- I can confirm that MAX10 pins are high impedance (> 10 Mohm) with 0 V supply.
Super ContributorHi,
my reading of MAX10 device handbook gives a slightly different picture. There are basically three different states:
1. Supply voltage below POR threshold
According to Fig. 2.7 and related description, weak pull-up is unconditionally enabled, drivers are disabled.
2. Configuration mode
State of weak pull-up is controlled by ICB, default is enabled. See Table 2.5.
3. User mode
Weak pull-up is controlled by general and pin specific configuration.
Regarding state during power down and missing supply. If power down triggers POR comparator, same situation as power up. Zero supply - not specified. Depends on Vgs,th of pull-up transistor, the question sounds somewhat sophistic to me.
Occasional ContributorThank you for your comment.
In the answer from AqidAyman_Intel, it was said that weak pull-up is disabled by default.
Since it was a machine translation, there was a possibility of a mistranslation, so I checked to see if it was recognized.
Also, I'm sorry for the lack of words.
What I wanted to check in question 4) was whether the I/O pins are floating when the power is off, or whether they are connected to weak pull-ups.
This is because the device connected to the I/O of the circuit under investigation starts up first, and I wanted to know the state of the MAX10's I/O pins when the power is turned off.
We apologize for the inconvenience, but it would be helpful if you could teach us.
- FvMI can confirm that MAX10 pins are high impedance (> 10 Mohm) with 0 V supply.
