AM6442: Can I use this oscillator?

K.Z

Expert 2590 points

Part Number: AM6442
Other Parts Discussed in Thread: AM62P, AM62L

Tool/software:

Hi All,

Crystal specifications are available, but oscillator specifications do not appear to be written in the datasheet.

AM6442: The requirement for Oscillator - Processors forum - Processors - TI E2E support forums

Can you check if the following products are available?

[SiT8008BI-73-YYE-25.0]
https://www.sitime.com/node/4856　

We have to get the BOM created as soon as possible.

Best Regards,

Ito

5 months ago

0 Kallikuppa Sreenivasa 5 months ago

TI__Guru**** 194259 points

Hello Ito

Thank you for the query.

Can you please confirm if SERDES0 is used in the design.

Regards,

Sreenivasa

0 K.Z 4 months ago in reply to Kallikuppa Sreenivasa

Expert 2590 points

Hi Sreenivasa,

There is no clear use for SERDES0 at present, but the board will be designed for
function expansion (USB 3.0).

Can you tell me why SERDES0 is relevant?

Best Regards,

Ito

0 Kallikuppa Sreenivasa 4 months ago in reply to K.Z

TI__Guru**** 194259 points

Hello Ito,

Thank you.

We have the oscillator specifications published in the AM62P or AM62D or AM62L data sheet that can be leveraged

When SERDES is used, there is an additional spec that gets added.

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa 4 months ago in reply to Kallikuppa Sreenivasa

TI__Guru**** 194259 points

Hello Ito,

When SERDES0 is used, there is an additional phase noise

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa 4 months ago in reply to Kallikuppa Sreenivasa

TI__Guru**** 194259 points

Hello Ito,

Please note the oscillator specs will be included in the next revision of the AM64x data sheet.

Regards,

Sreenivasa

0 K.Z 4 months ago in reply to Kallikuppa Sreenivasa

Expert 2590 points

Hi Sreenivasa.

Thank you for your reply.

Is VDDS_OSC (1.8 V) the correct power supply for the oscillator?
Also, is it OK to output the clock at the rising edge of VDDS_OSC?

Best Regards,

Ito

+1 Kallikuppa Sreenivasa 4 months ago in reply to K.Z

TI__Guru**** 194259 points

Hello Ito,

Thank you for the query.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1433049/faq-am625-am623-am620-q1-am625-q1-am625sip-custom-board-hardware-design-queries-regarding-crystal-mcu_osc0-start-up-time

Please refer below FAQ:

K.Z said:
Is VDDS_OSC (1.8 V) the correct power supply for the oscillator?

Correct.

K.Z said:
Also, is it OK to output the clock at the rising edge of VDDS_OSC?

Not sure i understand the query.

I would expect the clock to be available only after the VDDS_OSC is available.

Regards,

Sreenivasa