GreenPAK Designer Voltage Level Issue

⚠️
Hi there.. thanks for coming to the forums. Exciting news! we’re now in the process of moving to our new forum platform that will offer better functionality and is contained within the main Dialog website. All posts and accounts have been migrated. We’re now accepting traffic on the new forum only - please POST any new threads at https://www.dialog-semiconductor.com/support . We’ll be fixing bugs / optimising the searching and tagging over the coming days.
6 posts / 0 new
Last post
alestk
Offline
Last seen: 2 years 7 months ago
Joined: 2020-01-03 17:07
GreenPAK Designer Voltage Level Issue

Hello,

I am attempting to implement the technical note for a quadrature encoder to SPI-based counter described in AN-CM-277 in order to take a load off our microprocessor as it's needing to keep track of 18 encoders. 

I've purchased the following items from Digikey:

  • GreenPAK Universal Dev Board 1, Rev 1.3.1
  • SLG46140V-SKT 

Attempting to emulate the chip with the logic file supplied for AN-CM-277 either returns a "Chip not connected properly error" or a socket test error (as attached). When I attempt to read from the chip I get a "NVM is locked, Pattern ID 0" error if it passes the socket test. Otherwise I tend to get the same socket issue.

I took a look at my 'victim' SLG46140V under a stereoscope and it looks like the pogos are hitting the correct pads and nothing looks particularly 'off', so I am hoping someone can point me in the right direction on how to troubleshoot the issue.

I've tried the following steps to rule out my computer:

  • Swap USB ports (all tested)
  • Restart GreenPAK Designer
  • Restart PC
  • Attempt to reseat chip
  • Replace chip (definitely wasn't lost in a carpet)
  • Replace with another chip from the other side of the sample tape

Any advice would be immensely helpful. Thanks.

Device: 
Device Number: 
SLG46140V
pavloZ
Offline
Last seen: 2 years 6 months ago
Staff
Joined: 2018-01-31 12:50
Hi Thomas,

Hi Thomas,

something strange is going on.

I have a few suggestions, depend on your screenshots:

1. Chip is placed incorrectly (rotate 180 degrees)

2. You have wrong samples e.g. SLG46855 they have the same package. Try to run a new design for 855 chip and run emulation. Look if the chip will be recognized.

3. You have wrong both socket+samples Make sure you have GreenPAK TQFN-14 #1, not a PowerPAK TQFN-14 #1.

Please let me know of any update on this.

Thanks and regards,

Pavlo

alestk
Offline
Last seen: 2 years 7 months ago
Joined: 2020-01-03 17:07
I've verified that the chip

I've verified that the chip is correctly placed via stereoscope, no change in behavior when rotated 180* either.

Right now the programmer seems to really be struggling to even detect the chip, listing it as N/D in the debugging controls panel. When I can get the chip to get acknowledged, it's identified as a SLG46140V according to the debugging panel.

Switching over to a -855 profile gave the "Please check chip placement," error. The breakout that plugs into the programmer is a "GreenPAK TQFN-14 #1 Rev 1.1" board.

This is running on a Dell Precision laptop with Windows 10 and GreenPAK designer 6.20 if it helps.

I've included the markings I could see on the chip when I looked at it under the stereoscope for alignment as well below. The chip reads: 

-----------------
|  CJU        |
|  KBA       |
|  *   10      |
-----------------

* - index marking

 

edit: typo in GreenPAK designer version number

alestk
Offline
Last seen: 2 years 7 months ago
Joined: 2020-01-03 17:07
Hi there,

Hi there,

 

Hate to bump this, but is there any advice that you can provide regarding this issue? I am still running into the inability to use the devkit due to the voltage level issue.

LC_Dialog
Offline
Last seen: 1 year 4 months ago
Staff
Joined: 2016-09-19 23:20
Hi Thomas,

Hi Thomas,

The GreenPAK TQFN-14 #1 socket adapter boards had a known issue for some batches. The issue is with the socket pogo connectors touching the pcb and sometimes they seem misalligned. We are in the process of updating the inventory at various distributors, but you might have recieved one of the boards from the defective batch. I see that you ordered another replacement as well. Once you receive that, check if the problem is resolved and if not, we will send you working replacement socket adapter board. This is a first time issue which occured recently and does not apply to the socket adapter boards of other parts. We will do our best to resolve this issue for you. Apologies for the inconvenience..

Best regards,
LC_Dialog

pavloZ
Offline
Last seen: 2 years 6 months ago
Staff
Joined: 2018-01-31 12:50
Hi Thomas,

Hi Thomas,

sorry for delay with the answer.

Do you still have the same result with an updated GPAK Designer 6.21?