CDCDB800: clock buffer

SHEKHA SHOUKATH

Intellectual 510 points

Part Number: CDCDB800

Tool/software:

Hi,

it is specified in datasheet that by default diff impedance is 85 ohm.

we can't program each time when unit is ON , so can we program this bit via smbus from CPLD?

Thanks and Regards,

Shekha Shoukath

2 months ago

0 Michael Srinivasan 2 months ago

TI__Expert 8830 points

Hi Shekha,

You can program this bit using SMBus. See the attached screenshot for more register information, and refer to Sections 8-5 and 8-6 for more information.

Thanks,

Michael

0 SHEKHA SHOUKATH 2 months ago in reply to Michael Srinivasan

Intellectual 510 points

Hi,

Yeah it can be programmed via SMBUS, but we need to program one time, not every time the unit is turened ON. As clock buffer does not have any non volatile memory programming one time is not possible.As we are using a CPLD in the hardware which is instant on(having flash), so i am planning to program the bit from cpld via i2c interface(i2c ip core).So that we need not program clock buffer each time unit is turned ON. Is that okay?

Thanks and Regards,
Shekha Shoukath

0 Michael Srinivasan 2 months ago in reply to SHEKHA SHOUKATH

TI__Expert 8830 points

Hi Sheka,

It is perfectly fine to program the clock buffer from your CPLD.

Thanks,

Michael

Clock & timing

Clock & timing forum

CDCDB800: clock buffer