DLPC350 BSDL

STANISLAW SKOWRONEK2

Prodigy 85 points

Other Parts Discussed in Thread: DLPC350

Do you have the BSDL or other boundary scan chain description for the DLPC350?

over 11 years ago

0 Blair Conner over 11 years ago

TI__Expert 4720 points

Hi Stanislaw and welcome to the forum!

We have an IBIS model available on the product page (http://www.ti.com/product/dlpc350). Would this fit your needs?

Regards,

Blair

0 STANISLAW SKOWRONEK2 over 11 years ago in reply to Blair Conner

Prodigy 85 points

The IBIS model doesn't appear to contain a description of boundary scan register like BSDL models do. Even if the pad order in the IBIS file corresponds to chain order, I wouldn't know what are the tristate cells for the bidirectional I/O pads.

By the way, the current DLPC350 datasheet does not specify a value for EXRES, just says it should be +- 1%. I'm also curious about interpretation of the USB_ENZ pin (is it high = enable USB or low = enable USB?) and FAN_LOCKED (is it high = locked or low = locked?). If you have a reference design handy, I'd really appreciate a schematic to look at while reviewing my design.

Thank you,

Stan

0 Stuti Ghiya over 11 years ago in reply to STANISLAW SKOWRONEK2

TI__Prodigy 85 points

Hi Stan,

We do have a reference design: http://www.ti.com/tool/dlp4500-c350ref. If you go to Technical Documents, you can download the schematic of the LightCrafter 4500. Here is a direct link to the schematic: http://www.ti.com/lit/ml/tidr157/tidr157.pdf.

EXRES is a 160 ohm resistor.

USB_ENZ is low tells the USB host that the controller is ready for USB.

FAN_LOCKED is the tachometer output of the fan.

Regards,

Stuti

0 Stanislaw Skowronek1 over 11 years ago in reply to Stuti Ghiya

Prodigy 80 points

Thank you for the reference design link, it was very helpful.

If I have a board with unprogrammed Flash, is there a way to program it in system other than through Boundary Scan? I want to use very small packages for Flash (CSP) so socket-programming them is a pain.

0 STANISLAW SKOWRONEK2 over 11 years ago in reply to Stanislaw Skowronek1

Prodigy 85 points

I have enough of the boundary scan to be able to program the 32kB bootloader into a Flash device through JTAG. Then the firmware could be written through USB & the LightCrafter GUI.

If anyone else has a need to program DLPC350 Flash in-system, I'll be happy to prepare a short writeup & post tools online. For now I'm going to mark this question as resolved.

0 Sanjeev over 11 years ago in reply to STANISLAW SKOWRONEK2

TI__Mastermind 30875 points

Hi Stanislaw,

YES please.

We appreciate your valuable contribution to the forum by providing links to your write-up and tools details. Definitely this is going to be the important requirement for flashing in-system using BSDL.

Thanks in advance.

Regards,

Sanjeev

0 STANISLAW SKOWRONEK2 over 11 years ago in reply to Sanjeev

Prodigy 85 points

Hi Sanjeev,

Here's a write-up: http://unaligned.org/dlpc350/ - I hope it's useful.

I've submitted the DLPC350 support patch to urJTAG, so hopefully at some point you won't need to build urJTAG yourself...

Stan

0 Sanjeev over 11 years ago in reply to STANISLAW SKOWRONEK2

TI__Mastermind 30875 points

Thank you Stan. I appreciate it!!!

Regards,

Sanjeev

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