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Original question:

TMS320F28388D: USB-Boot Loader isn't recognized by Windows, when using 25 MHz oscillator

TMS320F28388D: I have a question regarding the use of the F2838x chip USB Bootloader.

Sang-il Nam
Expert 2430 points
Part Number: TMS320F28388D

Hi,

>> TMS320F28388D: USB-Boot Loader isn't recognized by Windows, when using 25 MHz oscillator (click)

Through the above posting, I confirmed that to use the F2838x chip USB bootloader, a 20MHz clock must be connected to the outside of the chip.

By the way, in the sentence below answered in the above posting, does the expression '20MHz XTAL' refer to 20MHz Crystal? Or 20MHz Oscillator (single-ended mode)?

>> The boot ROM code sets the dividers in a way so as to achieve 60MHz USB bit clock from 20MHz XTAL.

Please confirm.

Thanks and regards,
Sang-il