AM6412: MCU_OSC0 clock input

Darshan Shah

Prodigy 180 points

Part Number: AM6412

Can we just provide oscillator clock instead of XTAL (don't connect XTAL) for MCU_OSC0?

So just connect 25Mhz oscillator clock output to MCU_OSC0_XI and connect MCU_OSC0_XO to GND?

over 3 years ago

0 peaves over 3 years ago

TI__Guru 63585 points

Are you planning to use the SERDES for USB SS or PCIe?

Regards,
Paul

0 Darshan Shah over 3 years ago in reply to peaves

Prodigy 180 points

No USB superspeed or PCIe interfaces we are going to use.

0 peaves over 3 years ago in reply to Darshan Shah

TI__Guru 63585 points

You can use a 1.8V LVCMOS clock source as shown in the MCU_OSC0 LVCMOS Digital Clock Source section of the AM64x datasheet.

Your external clock source should meet the following requirements.

Duty Cycle - 45%/55%
Maximum Rise/Fall Time - 8ns @ 10%/90%
RMS Period Jitter - 10ps, 100k samples
Peak to Peak Period Jitter - 100 ps, 100k samples
RMS Phase Jitter (random) - 2ps (when SERDES not used)

Regards,
Paul

+1 Darshan Shah over 3 years ago in reply to peaves

Prodigy 180 points

Ok great! Good to know that 1.8V LVCMOS oscillator with above spec. is fine. We can resolve the issue.

Processors

Processors forum

AM6412: MCU_OSC0 clock input