Linux/TMS320DM8148: Linux/TMS320DM8148

Samuel Hsieh

Tool/software: Linux

Hi TI sirs,
Do you have any requirement/reference of VCXO source selection and circuit design? Basically i will connect #R1(AUXOSC_MXI/AUX_CLKIN) to VCXO output and #T1(AUXOSC_MXO) to ground. Provide 3.3V to power supply of VCXO. Please advise. Thanks.

B/Rgds

Samuel

over 6 years ago

0 Pavel Botev over 6 years ago

TI__Guru**** 170625 points

Hi Samuel,

Please refer to the DM814x datasheet and EVM for reference.

www.ti.com/.../tms320dm8148.pdf

www.ti.com/.../tmdxevm8148

Regards,
Pavel

0 Samuel Hsieh over 6 years ago in reply to Pavel Botev

Prodigy 70 points

Hi Pavel,
Many thanks. From "www.ti.com/.../tmdxevm8148" I cannot find the reference design with VCXO on AUXOSC. All of them were using crystal.

B/Rgds
Samuel

0 Pavel Botev over 6 years ago in reply to Samuel Hsieh

TI__Guru**** 170625 points

Samuel,

From what I understand you are using your board in datasheet configuration "Figure 7-10. 1.8-V LVCMOS-Compatible Clock Input (AUX_OSC)".

We don't have any reference design with that configuration. All I can suggest you is to align with datasheet timing requirements shown in "Table 7-16, Timing Requirements for AUXOSC_MXI/AUX_CLKIN".

Regards,
Pavel

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Linux/TMS320DM8148: Linux/TMS320DM8148