Require I/O bank Voltages of STM32N657X0H3Q

[Tejas_P_R]

Hi All,

I was searching for a I/O bank voltages of different GPIO ports available in the controller.

In datasheet there is no proper information on supply voltages for the GPIO Pins., could you please suggest the document which is having the information of supply voltages for different I/O banks.

 

Note: However, I am unable to confirm which ports support 3.3V. Table 18 of the datasheet does not correlate the PIN numbers with VCCIOX.

Below figure shows only few I/O ports.

 

 

Regards

Tejas

[mƎALLEm]

Hello,

I think the logic behind that presentation in the datasheet:

Specific I/O bank voltages are shown in the figure 15 (VDDIOX).

The remaining GPIOs are power supplied with VDD.

[RomainR.]

Hello @Tejas_P_R 

All GPIOs of the STM32N6 are 3.3 V-tolerant I/O (TT tolerant) but can operate at 3.3V or 1.8V.
The Table 51 shows the list of GPIO for each VDDIOx supply. 

To do this, there are independent power rails. VDD and VDDIOx (with x = 2, 3, 4, and 5) and can operate at 3.3V or 1.8V. You need to fuse the OTP124 bits and correctly configure by firmware the:
VDDIO4VRSEL bit in PWR_SVMCR1 register.
VDDIO5VRSEL bit in PWR_SVMCR2 register.
VDDIOVRSEL, VDDIO2VRSEL and VDDIO3VRSEL bits in PWR_SVMCR3 register.

Refer also to:
DS14791 Rev 3 5.1.2 Typical values and Table 21. Voltage characteristics.
AN5967 - Rev 1 3.1 Main power supplies

Best regards,

Romain,