Hi ,
There are 12V pins on the HDK board. Can i configuration like differents voltage or gio pins ? For example sometime 0 voltage sometime 12 voltage.
Hi Dobby,
TMS570LC4357 HDK board works with input 12v, but this 12v is not directly connected to GIO's or microcontroller.
As shown in below picture the 12v first converted 5v and then the 5V will get converted to 3.3v and 1.2V.
These 3.3v and 1.2v are connected to microcontroller IO supply and core supply respectively.
And as mentioned in datasheet the IO supply cannot be less than 3v or more than 3.6v that is the reason we used IO supply as 3.3V. And this IO supply decides the GIO levels.
And this IO supply decides the logic high voltage on GIO, as mentioned in below picture the minimum output high voltage on IO pin is VCCIO-0.3 that means we will get 3.3-0.3 = 3V.
So, we will get 3 to 3.3v on the GIO pins of microcontrollers.
If you need 12v GIO's then you need to place external switch as shown below:
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Thanks & regards,
Jagadish.
