TUSB4041PAPEVM: No attached TUS840 device was found

Ola Widehagen

Prodigy 50 points

Part Number: TUSB4041PAPEVM

Hello,

I'm using the TUSB4041PAPEVM evaluation board together with "TUSB80xx_EEPROM_Programmer_V1.0.0.1" toolkit

The EEPROM was empty (0xFF) from delivery and I have know made my unique configuration file to load into EEPROM

By entering value 0x55 at address 0x00 the device should read configuration from external EEPROM

Switches are set accordingly,

SW1-2	SMBUSz	PU : 1 = I2C mode, 0 = SMBus mode	PU 1kohm	OFF -> PU
SW1-3	SCL	PD : I2C serial clock	PU 1kohm	ON -> PU
SW1-4	SDA	PD : I2C serial data	PU 1kohm	ON -> PU

The "on-time program" of EEPROM works as expected, but now there is no access to the EEPROM from the toolkit SW anymore ...

How to resolve this issue ?

Regards,

Ola

over 2 years ago

0 David (ASIC) Liu over 2 years ago

TI__Guru**** 176991 points

Hi, Ola

Does your PC have Window Secure Boot enabled? Can you go to your UEFI BIOS when the computer starts before Windows loads by pressing F10 or Del on the keyboard (or F12 – this key varies with each PC). Once in the BIOS, look for an option to disable Secure Boot. Save settings once it is disabled. Then you will be able to disable the driver signature enforcement and if you are able to program the EEPROM?

Thanks

David

0 Ola Widehagen over 2 years ago in reply to David (ASIC) Liu

Prodigy 50 points

Hi David,

I just checked the BOOT sequence and "Secure boot" is already disabled

Any other suggestion to try out ?

BR,

Ola

0 David (ASIC) Liu over 2 years ago in reply to Ola Widehagen

TI__Guru**** 176991 points

Old

So the issue shows up after you program the EEPROM? Can you access the TUSB4041 if the EEPROM is removed while the TUSB4041 is still in I2C mode?

Thanks

David

Interface

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TUSB4041PAPEVM: No attached TUS840 device was found