We have designed intel atom E3800 family based board and we are trying to debug it. We have got following observation on processor..... TP_CORE_V1P05_S4 pin has 1.05V but TP2_CORE_VCC_S3 pin has no voltage.
Is that means Vcore is not ok? .. On the PMIC, Vcore is 1.0V and seems Ok.
- Embedded Intel Atom®
Hello, SABARIVASA@ECIL :
Thank you for contacting Intel Embedded Community.
We would like to address the following questions:
Could you please inform us how many units have been manufactured, how many are failing, and the failure rate?
Could you please let us know the sources that you have used to develop the affected design?
Could you please give us pictures of the affected processors? Specifically of the top side markings.
Finally, could you please confirm if the schematics and layout of the project associated with this situation have been reviewed by Intel?
Waiting for your answer to these questions.
For now we have manufactured 2 units....and both r failing...
I have used intel isx reference kit and as reference.... As we have used Rohm PMIC ... We have taken reference of gojoyo also...
I have selected e3815 processor.... Picture will be shared soon...
LAYOUT and schemetics are not reviewed by intel.
Thanks for your update.
We suggest you verify that implementation fulfills with the requirements stated in chapter 4, on pages from 50 to 77 of the https://cdrdv2.intel.com/v1/dl/getContent/512379 Intel(R) Atom(TM) Processor E3800 Product Family Platform Design Guide (PDG) document # 512379; and in the http://www.rom.by/files/4_wire_pwm_spec_rev1.4_0.pdf VR12/IMVP7 Pulse Width Modulation (PWM) Specification document # 397113.
The PDG is accessible when you are logged into your Resource & Design Center (RDC) Privileged Account.
We hope that this suggestion may help you.
Hello, SABARIVASA@ECIL :
Thanks for your reply.
The information related to the voltage of the cited pin is related to CORE_VCC_S3 rail. It can be found in sections 9.3.1 and 9.3.2, on pages from 120 to 128 of the https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-e3800-family-datasheet.pdf Intel(R) Atom(TM) Processor E3800 Product Family Datasheet document # 538136.
On the other hand, could you please give us more details (such the postcodes) of the LPC issue that your design is experiencing?
Waiting for your reply.
I checked for LPC post codes on oscilloscope and got following post codes on port 80..
01h...02h...03h...04h....05h...14h.. in middle few of the code i observed are ... 12h with 10h on port81.... 32h with 10h on port81...42h with 10h on port81...42h with 20h on port81...42h with 30h on port81... 42h with 40h on port81..42h with 50h on port81..
Last post codes...
52h with 10h on port81.... 52h with 20h on port81.... 52h with 30h on port81.... 62h with 10h on port81.... 92h with 10h on port81...A2h with 10h on port81...72h with 30h on port81...D2h with 10h on port81...and last one is A2h with 20h on port81..
Got no signal over PCU-UART....
How to go ahead?
We apologize for the delay to give you an update.
In order to help you, we suggest you address all your consultations related to this thread by filling out the https://www.intel.com/content/www/us/en/secure/forms/design-assistance.html Embedded Design Assistance form.
We hope that this information may help you.