AM6442: CLKOUT0 specifications

Geoffrey Ficara

Part Number: AM6442
Other Parts Discussed in Thread: TUSB4020BI

Hi,

Customer would like to know if he can use the CLKOUT0 to supply the TUSB4020BI (24MHz, ±100PPM or better frequency stability and <50ps absolute peak-to-peak jitter).

CLKOUT0 being sourced from MAIN_PLL0_HSDIV4_CLKOUT I'd like to get the specifications of the internal circuitry (MCU_HFOSC0, PLL0 , PLL0_HSDIV) in order to know if the signal is compliant to the input clock requirements of the TUSB4020BI .

Thank you,

Geoffrey

3 months ago

+1 JJD 3 months ago

TI__Guru* 93891 points

No, the CLKOUT0 is only a 25 or 50MHz clock intended to be used for Ethernet PHYs. More information can be found here: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1521570/am6442-clarification-on-clkout0-a19-usage-for-custom-10-mhz-clock-output?tisearch=e2e-sitesearch&keymatch=clkout0#

Regards,

James

+1 Kallikuppa Sreenivasa 3 months ago in reply to JJD

TI__Guru**** 222315 points

Hello Geoffrey

Additional inputs:

We also do not define performance of the clock output because it can be system dependent. You should validate the clock output performance meets the clock input requirements for the attached device across all operating conditions before deciding to use it.

More information can be found here: https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1521570/am6442-clarification-on-clkout0-a19-usage-for-custom-10-mhz-clock-output?tisearch=e2e-sitesearch&keymatch=clkout0#

Regards,

Sreenivasa

0 Geoffrey Ficara 3 months ago in reply to Kallikuppa Sreenivasa

TI__Expert 4075 points

thank you both

0 Kallikuppa Sreenivasa 3 months ago in reply to Geoffrey Ficara

TI__Guru**** 222315 points

Hello Geoffrey

Thank you for the note.

Regards,

Sreenivasa

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AM6442: CLKOUT0 specifications