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EVM6657LS

Michi Yama
Guru 10030 points
Other Parts Discussed in Thread: TMS320C6657

Hi,

I have one question regarding TMDSEVM6657LS.

I would like to know how to change SYSCLK1(to CorePAC).

Now I am using simple program like "Hello World" without SYS/BIOS.

Its code looks like running with 100MHz. I would like to change the sysclk to 1GHz.

IEVM6657LS has test pins. TP12 of test pins is DSP SYSCLKOUT.

So I used evmc6657l.gel file to change the PLL setting. But sysclk does not change.

TP12's clkout is not changed.  clkout is still 100MHz.

Can "evm6657l.gel" change the pll setting for SYSCLK to 1GHz?

Please advise me.

Best regards,

Michi

  • 0
    TI__Mastermind 30825 points

    SYSCLKOUT is 1/6 of SYSCLK1, are you sure it's not 167MHz?  

    Also, when booting the device, it should automatically configure itself to 1GHz.  Only in I2C and SPI boot would it not be configured automatically but our I2C ROM on board is programmed by default to configure it for 1GHz operation.  And the GEL file itself also does this.

    You may want to check the Data Manual which has detailed descriptions of Main PLL and also the PLL UG.  Both can be found on the Product Page -> TMS320C6657

    Best Regards,

    Chad