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MSP430F5659: Differences in USB controller from MSP430F5529

stomp
Genius 4675 points
Part Number: MSP430F5659
Other Parts Discussed in Thread: MSP430F5529

Hi,

We have a new design we are bringing up based on MSP430F5659.

We are using our USB driver stack for MSP430F5529 on a board that fitted with a '5659. Naturally we have changed the linker script and CPU type in CCS.

We can not get the MSP430F5659 device to enumerate, we get one USB interrupt and then no more. I am unable to find any differences in memory mapping or data sheet errata.

Can anyone suggest if there are any obvious differences between the USB controller on either part. I would have assumed, if the hardware is correct, that the USB stack for one device should work on the other.

Thanks

Stomp!.

  • 0
    Guru 34483 points

    MSP430F5529 MCLK is up to 25 MHz, while MSP430F5659 is limited to 20 MHz. Don't know about used XT2 value and PLL setup.

  • 0 in reply to zrno soli
    Genius 4675 points
    Thanks for the ultra quick response!.

    You are correct about the 20MHz, I don't know why we did not catch that one.

    We still have no USB response, and I think we need to look deeper into the FLL setup. At this point I think its not possible to use a 24MHZ XT2 on the '6569 and have both USB at 48MHZ and MCLK at 20MHZ. I think we need to move to a 4MHZ Oscillator.

    Thanks
    Stomp!

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