FX3 SPI power voltage?

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
KACH_4155631
Level 1
Level 1

The SPI power domain is VIO4 and the default value is 3.3.

Could anyone tell me how to change the power from 3.3 v to 2.5V?

Is there a API can do it?

0 Likes
1 Solution
Rashi_Vatsa
Moderator
Moderator
Moderator
5 likes given 500 solutions authored 1000 replies posted

Hello,

The SPI power domain cannot be changed using API.

Hardware changes need to be done to change  VIO4  to  2.5 V from 3.3 V.

- VIO4 power domain need to be changed

Please let me if you are using the FX3 explorer kit? (CYUSB3KIT-003). If yes, then VIO4 is supplied with 3.3V and it cannot be changed to 2.5 V using J2 jumper or by calling API

Please let me know if any queries on this

Regards,

Rashi

Regards,
Rashi

View solution in original post

0 Likes
3 Replies
Rashi_Vatsa
Moderator
Moderator
Moderator
5 likes given 500 solutions authored 1000 replies posted

Hello,

The SPI power domain cannot be changed using API.

Hardware changes need to be done to change  VIO4  to  2.5 V from 3.3 V.

- VIO4 power domain need to be changed

Please let me if you are using the FX3 explorer kit? (CYUSB3KIT-003). If yes, then VIO4 is supplied with 3.3V and it cannot be changed to 2.5 V using J2 jumper or by calling API

Please let me know if any queries on this

Regards,

Rashi

Regards,
Rashi
0 Likes

Yes i use CYUSB3KIT-003 board.

Is it possible I rework the board to let the VIO4 change to 2.5 level?

If possible ,could you give me the rework direcion?

Thanks for your help.

0 Likes

Hello,

FX3 Explorer kit board doesn't have 2.5 V LDO and the B11 (VIO4) pin is not brought out on the board.

The 3.3 V LDO cannot be replaced with 2.5 V as other power domains (VIO5 and CVDDQ) are supplied with 3.3 V.

You need to design a custom board for the changes (VIO4 : 3.3V to 2.5 V)  needed.

Regards,

Rashi

Regards,
Rashi
0 Likes