DLPC4430: To reduce the spoke size for DDP4421

Hidenori Katagiri

Part Number: DLPC4430
Other Parts Discussed in Thread: DLP650LE

Tool/software:

Hello, TI.

I would like to talk for reducing spoke size.
I have faced two issues trying to redulce the spoke size from 12.0 to 4.00 degree.

The configuration I'm using are

DLP650LE (0.65 inch WXGA 2xLVDS).
DDP4421
DLP composer versions 13.6

Issue 1
I can't set the spoke size under 7.80 degree in System Definition.

Reduce the spoke size, then save it in System Definition.
Next, the error occures during build process in Sequence Set Definition.

The error message is as below.

and Bit Sequence Builder Log is here.

------------------------------------------------------------------------------------------
There are no looks available for the group: Bright
There are no looks available for the group: Light Control 7
There are no looks available for the group: Light Control 7 (3Seg)
Bad processing DDP4421BPCalc return value encountered.

ERROR occurred in processing block# 6
------------------------------------------------------------------------------------------

It seems that the switching timing from Red to Green gets past boundary line of Rev1 and Rev2, when the issue happens.

Spoke = 12.00 deg

Spoke = 7.00 deg

Issue 2
Even if I go with the spoke size 8.00 deg as compromise, I faced another issue that I can't set a pulse for Auxllary signal at instant of swtiching Red to Green.
I should put the falling edge at bggining and the rising edge at ending of Timining Chart but it seems not to be supposed to put falling edge at beggining.
The details are show as below picture.