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TLV320DAC3101EVM-U: CodecControl can't Update Firmware

Part Number: TLV320DAC3101EVM-U

Dear TI Expert

I am using TLV320DAC3101EVM-U for product development and using CodecControl software Version1.0.

As the default sampling frequency was 44.1KHz, I updated firmware as 48KHz (USB-AudioEVM0304_48KHZ.BIN) supplied with slac563b and it works.

Then I tried to change various sampling firmware images and selected DFUEE.BIN, then EVM didn't work.

I tried to update again, but the "File"-->"Update Firmware" was gray out and couldn't recover.

Please assist....