To read PMODE states instantly in Denebola

[RameshRajan]

Hi,

I want to know the state of PMODE pins states instantly through software instructions. Can I know how can I do this?

Thanks,

Abdul.

[JayakrishnaT_76]

Hi Abdul,

Please let us know why you want to know the state of PMODE pins. As you might be knowing, the state of PMODE pins is sampled by the ROM Bootloader upon power of the device to evaluate the boot mode. The state of these pins are relevant only during the ROM bootloader has started (device being powered up).

[AliAsgar · Accepted solution]

Hi Abdul,

Unfortunately, we do not have any software instructions to get the state of PMODE pins instantaneously.

You could configure PMODE pins as input GPIOs and use the method given in the following KBA to get the state of the PMODE pins.
https://community.infineon.com/t5/Knowledge-Base-Articles/How-FX3-CX3-Bootloader-detects-the-state-o....

Best Regards,
AliAsgar

[RameshRajan]

Hi AliAsgar,

Thank you for responding. 

What are the recommended external pull-up/ pull-down resistors for PMODE pins to set device in SPI boot mode?

[AliAsgar]

Hi Abdul,

Please refer to AN70707 for details on FX3 hardware design guidelines. https://www.infineon.com/dgdl/Infineon-AN70707_EZ-USB_FX3_FX3S_SX3_hardware_design_guidelines_and_sc...

Best Regards,
AliAsgar

[Subhash24]

@AliAsgar  how to get access to PMODE pins to read values, i.e, what  GPIO pins are used to read PMODE states?

[AliAsgar]

Hi Subhash,

Please refer to FX3 datasheet pin description for pins of PMODE and refer to the KBA above for details on how to read the PMODE pins.

Best Regards,
AliAsgar