PTN3356 DisplayPort to VGA.
PTN3356 has ROM type and Flash type.
We used both ROM type and Flash type, but didn't work.
We designed Schemetics that is copyed NXP reference, so we think Schemetics is no problem.
Does it have to program? Does it need a program using tool?
1) Crystal scope : 27MHz XTAL at power on,
oscilator about 1msec and disappear 27M waveform.
2) Realtek's DP to VGA module: It works well when we attach DP to VGA module to our DP port,
Mr Han , Solvitsystem.
Hello,
I believe, we have a similar problem, Crystal 27MHz XTAL is not oscillating. I will check if there is any clock activity following power up.
Please comment what was the root cause that you found.
Alex
Hi ,
Thank for your quick answer.
Our schematic is almost no proble.
At first , I would like to know need to program in PTN3356 like flash ROM .
Mr Han , in SOLVITSYSTEM
Hi,
Please check whether you schematic has a capacitor between SWOUT pin and PGND firstly!
Hi ,
OK , the 31 pin , SWOUT is connected 4.7uH input ,and 4.7uH inductor output is connected to 28 pin and CAP 4.7uF plus 0.1uF 3ea .
CAP out voltage , VDD 1.5V is OK .
Is it true that there is no need to program PTN3356 ROM or flash ROM using any down loading tools?
Thank for you response.
Mr Han .
Hi,
Do you have the DPCD tool used under Linux?
Hi,
I'm out of the office now.
I will check your response back to office.
Thank for your sincerely response.
Mr han.
Hi,
The Problem was cleared .
The problem is that Schemetic have missing point.
Thank you .
Hi,
Please attached the schematic for us review!
Thanks!
BR