DS90UB948-Q1: Could internal clock of UB948 support 200M or 800M or other frequence?

Joey Jin

Part Number: DS90UB948-Q1

Hi,team

When use 948 test pattern, I need use internal clock to debug, could internal clock of UB948 support 200M or 800M or other frequence?

over 3 years ago

+1 Casey McCrea over 3 years ago

TI__Guru** 103215 points

Hello Joey,

948 internal clock can support 140Mhz, or integer divisions of 140MHz such as 70MHz, 35MHz. If you want more granular frequency selection, you can use the internal PCLK on the 94x serializer to generate a pattern instead and then send that to the 948 over FPD-Link

Best Regards,

Casey

0 Joey Jin over 3 years ago in reply to Casey McCrea

TI__Intellectual 2920 points

Hi,Casey,

Your answer is considerate.

My original thought is if 948 internal CLK could support more than 140MHz, I will prefer use it; If not ,I will use 947 generate a pattern instead it .

Thank you.

0 Joey Jin over 3 years ago in reply to Casey McCrea

TI__Intellectual 2920 points

Hello Casey ,

Casey McCrea said:
948 internal clock can support 140Mhz, or integer divisions of 140MHz such as 70MHz, 35MHz

----If internal division to 70M, the 70M is Single or Dual OpenLDI .

Changing a word，If internal division to 70M，sigle OLDI is 35M or 70M?

+1 Casey McCrea over 3 years ago in reply to Joey Jin

TI__Guru** 103215 points

Hello Joey,

That frequency is the single OLDI frequency. So if you use dual, it would be 1/2. For example if you use 140M/2 = 70MHz, then in dual mode, each OLDI port would output 35MHz

Best Regards,

Casey

0 Joey Jin over 3 years ago in reply to Casey McCrea

TI__Intellectual 2920 points

Understood !

THANK YOU ~

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DS90UB948-Q1: Could internal clock of UB948 support 200M or 800M or other frequence?