TPS25762-Q1: CAN NOT FLASH To DEVICE ALLWAIS 87%

progless is 

Writing SFWd chunk 1
...
Writing SFWd chunk 245
Sending SFWs chunk_number:0
SFWs return with task code : 0x6
SFWs return with task result :Error:resered

Hello inoue,

Section 5.2 in the TPS257XX-Q1-GUI Configuration Guide states:

During end-product production, initial programming of the EEPROM must be performed using I2C with the Full Flash binary image built with the desired set of keys. Field updates can then be done using the TPS257XX-Q1- GUI tool over a USB connection to the primary charging port with the USB EP binary image that was built with the same set of keys. The customer-specific private keys must be kept secure and need to be loaded at the time of USB field update to reprogram the device; otherwise, the secure firmware update process does not complete.

Has the EEPROM been programmed with a Full Flash binary image via I2C first before attempting USB ENDPOINT FLASH?

Are the same keys being used to generate the USB EP binary image as the ones used to build the initial Full Flash binary image?

Is the same base FW version (or higher) being used to generate the USB EP binary image as the one used to build the initial Full Flash binary image?

BR,

Seong

I can usb ep secure flash

write eeprom step is

first time :full flash write i2c 

secondtime letter: can write usb ep secure flash

but same key and 

thank you