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Connecting Clock signal to ADAS1000-4 instead of Crystal

Category: Hardware
Product Number: ADAS1000-4

Hi, 

We are working on using ADAS1000-4 and ADAS1000-2 in gang mode for ECG data capture. We would like to feed clock using clock generator instead of Oscillator. Should we connect the clock to Clock_IO Pin or XTALin pin. 

In the ECGCTL register Bit 6 (CLKEXT), there is option to select either XTLA as clock source or Clock_IO as clock Source. Please clarify, if we can connect clock signal from a clock generator to Clock_IO pins of both ADAS1000-4 and ADAS1000-2 IC.

or do we need to connect Clock signal to XTAL IN Pin and Clock to ADAS1000-2 is fed from the clock_io of ADAS1000-4...?

Thanks

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  • Hi  ,

    We will look into this. I will contact the product owner and get back to you.

    Regards,

    JC

  • Hi,

    There should be no XTAL pin for ADAS1000-2 and will only have CLK_IN pin since this is a dedicated slave device when  used in gang mode. Clock of slave device should be coming from CLK_IO of master device.

    For ADAS1000-4, CLK_IO can be used as the clock source.

    -Mark

  • Hi Mark, 

    We want to use ADAS1000-4 and ADAS1000-2 in GANG Mode. In this case, Do I need to connect Clock in the following way....?

    Method-1:

    1. Clock signal from Oscillator/Clock generator to XTAL1 PIN of ADAS1000-4.

    2. Clock_IO of ADAS1000-4 will act as clock source to ADAS1000-2. So, ClK_IO of ADAS1000-4 will be connected to CLK_IN of ADAS1000-2.

    or Should we do the following 

    Method-2:

    1. Connect Clock signal from Oscillator or Clock generator to CLK_IO Pin of ADAS1000-4

    2. Connect Clock signal from Oscillator or Clock generator to CLK_IN Pin of ADAS1000-2

    Thanks

Reply
  • Hi Mark, 

    We want to use ADAS1000-4 and ADAS1000-2 in GANG Mode. In this case, Do I need to connect Clock in the following way....?

    Method-1:

    1. Clock signal from Oscillator/Clock generator to XTAL1 PIN of ADAS1000-4.

    2. Clock_IO of ADAS1000-4 will act as clock source to ADAS1000-2. So, ClK_IO of ADAS1000-4 will be connected to CLK_IN of ADAS1000-2.

    or Should we do the following 

    Method-2:

    1. Connect Clock signal from Oscillator or Clock generator to CLK_IO Pin of ADAS1000-4

    2. Connect Clock signal from Oscillator or Clock generator to CLK_IN Pin of ADAS1000-2

    Thanks

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