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J
JR1
Associate II
March 13, 2024
Solved

STM32G4 I/O input high level voltage

  • March 13, 2024
  • 2 replies
  • 2096 views

Dear Sir's,

 

what is the minimum high level threshold voltage

for a non FT_C port? Is it 0.7xVDD or 0.49xVDD+0.26?

2024-03-13_13h09_41.png

 

Regards,

Jochen

This topic has been closed for replies.
Best answer by KDJEM.1

Hello @JR1 and welcome to the community :),

These 2 formulas are correct  VIH = 0.7x VDD is the threshold tested in production and VIH=0.49xVDD+0.3V is the threshold guaranteed by design as mentioned in note 3.

This behavior is mentioned in data sheet figure 25: in blue the threshold level tested in production and in green the threshold level guaranteed by design.

KDJEM1_0-1710332841903.png

May this discussion can help you.

Kaouthar

 

2 replies

Andrew Neil
Andrew Neil
Super User
March 13, 2024

What does the note (3) tell you?

AndrewNeil_0-1710332378970.png

 

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
KDJEM.1
KDJEM.1Answer
Technical Moderator
March 13, 2024

Hello @JR1 and welcome to the community :),

These 2 formulas are correct  VIH = 0.7x VDD is the threshold tested in production and VIH=0.49xVDD+0.3V is the threshold guaranteed by design as mentioned in note 3.

This behavior is mentioned in data sheet figure 25: in blue the threshold level tested in production and in green the threshold level guaranteed by design.

KDJEM1_0-1710332841903.png

May this discussion can help you.

Kaouthar

 

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