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EVMK2H CLK3 module programming issue

Ming-Che Lin
Prodigy 160 points
Other Parts Discussed in Thread: CDCM6208

Hi,

I am using EVMK2H board. I would like to configure CDCM6208 clock generator to input reference clock from AMC pins TCLK P/N. Do I need to program the MCU and how to program. Thanks.

Ming-Che Lin

  • 0
    TI__Guru* 81335 points

    Hi Ming,

    We are working on this post. We will get back to you. Thank you for your patience.

  • 0
    TI__Mastermind 42545 points

    Hi Ming-Che,

    You didn't specify which AMC TCLK pin pair or which CDCM6208 that you wanted to configure but let me provide some additional information.

    The CDCM6208 labeled CLK1 in the schematic provides the SYSCLK, TSREFCLK and PASSCLK to the K2H. This clock generator can be referenced to either the Rakon 19.2MHz VCTCXO connected to the SECREF or by the AMC TCLKD pair connected to the PRIREF. According to the information that I have, the Smart MUX mode select bit (SMUX_MODE_SEL) in register 4 bit 13 is set to 0 or auto mode. In this mode the CDCM6208 will use the PRIREF as the reference clock if a clock is present or the SECREF if the PRIREF is not present. 

    The CDCM6208 labeled CLK3 in the schematic provides the HYPLNK0CLK, HYPLNK1CLK, ARMCLK, ALTCORECLK, DDR3ACLK, DDR3BCLK, USBCLK and PCIECLK to the K2H. This clock generator can be referenced to either the Fox 25MHz XO connected to the SECREF or by the AMC TCLKB pair connected to the PRIREF. According to the information that I have, the Smart MUX mode select bit (SMUX_MODE_SEL) in register 4 bit 13 is set to 0 or auto mode. In this mode the CDCM6208 will use the PRIREF as the reference clock if a clock is present or the SECREF if the PRIREF is not present. 

    I stress that this is an Advantech product, but according to the information that I have, either of these clocks should automatically use the AMC clock if it is present. No further configuration should be needed. 

    Regards, Bill