DSP-6678 VCL- VD pins(not used for PM-bus)

srinivasaprasad saladi

Other Parts Discussed in Thread: UCD9222

Hi,

In EVM schematic M24- DSP VCL , M23- DSP VD are connected to PM bus but in 6678 datasheet they are reserved pins & should be left unconnected.

Can i left unconnect Please give solution.

Thanks & Regards,

Prasad.

over 13 years ago

0 MJovi over 13 years ago

TI__Intellectual 2465 points

Hi Srinivasaprasad,

I would recommend you to follow data sheet recomendation. Please also see following link:

http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/141135.aspx

Regards,

Majda

0 srinivasaprasad saladi over 13 years ago in reply to MJovi

Intellectual 295 points

Hi Majda,

Thank you for answer & quick response. In advantech 6678 EVM .XML File for power controller ucd9222 Configuration it is given as 6bit VID.But nowhere in the 6678 data manual mentioned about 6 bit VID interface. Only in hardware design guidelines document 6 bit VID interface is mentioned.

Please let me know what is default VID interface 4bit or 6bit is coming for C6678. Also mention in which document default settings are given for C6678.

Thanks & Regards,

SrinivasaPrasad.

0 Chad Courtney over 13 years ago in reply to srinivasaprasad saladi

TI__Mastermind 30825 points

Please follow the HW Design Guidelines for board design. The C6678 does not support a 4 bit VID, it supports a 6 bit VID, via the VCNTL[3:0] pins (3 for data, 1 for control - the 6 bits are sent in two transimissions.) The Data Manual briefly discusses this and then references the HW Design Guidelines for implementation.

Best Regards,

Chad

0 fuxin over 9 years ago in reply to Chad Courtney

Prodigy 10 points

Hi Chad Counrtney!

My code run away in my board. And the CVDD in my board is normal before running my code,but the CVDD is ov after my code run away. What's the problem?

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DSP-6678 VCL- VD pins(not used for PM-bus)