Intel 27011 Eproms Intel, 27011, Eproms

lungchard

I have purchased a T56 to specifically program Intel 27011 paged eproms.I cannot get it to work.
It can read ID number 89 85 but it will not program the chip.
Anyone had similar problems?

Best Regards

Richard.

lungchard

Hello Sir,
My eproms pass blank check ok.
I checked a few voltages on the eprom during programming and have found Vpp to be about 5volts.
It should be 12.5volts!!
I am investigating further.
It is possible my eproms are faulty but i have no way of verify that they are good.
27011 are very rare and not easy to find.

Thank you to take the time to reply to my post.

Richard.

lungchard

Hello Sir,I have done some testing today and got a good idea where the problem is coming from.
I connected external supplies to VCC and VPP from my bench power supply.
After power up in the correct sequence (VCC then VPP) I was able to program the device.
I have passed all info to Xgecu technical support and the agent who sold it to me is also helping my case.
I expect it is a simple firmware issue but can only guess at that.
Hope they can fix it.

Tnx,

Richard.

lungchard

Hello Sir,I cannot program the Eprom completely as there are errors in some pages.
Page 0 is ok but after that there are many errors.
I think there are 2 main issues with this device.
Vpp is not +12.5v and the page switching seems to be unreliable.
I can only hope that XGecu can come up with a fix.
I have had no response from them and neither has the Chinese supplier I purchased the unit from.
Shame the tech support is not good.
The unit itself looks to be good but after sales support lets it down.

Richard.

lungchard

Reply to #8 Albano.Matos

Hello Sir,
Got a patch via the chinese supplier i purchased the t56 from, and this is looking better.
I can program the eprom but get 18 addresses that have errors.
I am not sure if my eprom is 100% good so i will order a new one and try again.
The issue with the programming voltages appears to be sorted.
VPP should be set to 13v as the data sheet says the minimum is 12.75v.
I will post again once i have tested a replacement eprom.
This may take time as ebay is not the fasted for delivery.

lungchard

Hello Sir,
I have tried erasing for 10, 15, 20 and 30 minutes with the same result every time.
Address 00 has a value in it that the programmer will not over-write hence it fails.
It fails to write correctly a total of 18 addresses. All other addresses write correct data.
I have ordered a replacement eprom for further tests.

lungchard

Hello Sir,
Unfortunately my problem has not been resolved with the latest version.
I am waiting on delivery of new eprom to carry out more tests.
I will post the results here once I have done that.

lungchard

Hello Sir,
I have returned the unit to XGecu agent in china. They will send it to the factory for testing.
I have sent them a 27011 and a 27C011 Eprom to test the unit.
I have also sent them the .bin file I am trying to write to the Eprom.

I see from your post you are using different voltages than what I used.
Do not use the defaults, they do not work.
VPP must be 13v and VDD must be 6.5v.
See the device data sheet at the end of page 4-192.
This shows the required voltages for quick pulse programming which I believe is what the T56 is using.
17.75V VPP is not an option on Xgpro so use 13V. The device maximum is 14V so OK to use 13V.
6.25V VCC is also not an option on Xgpro so use 6.5V.
These settings do program the device but with 18 repeatable errors. See my screen shot.
Once I get feedback from XGecu I will post the news here.

Bye for now,

Richard.
[attach]2234[/attach]

[attach]2235[/attach]

lungchard

Hello Sir,

Typo in first reply.
VPP is not 17.5V on the data sheet, it is 12.75V.
6.25V for VDD write is selectable but I used 6.5V. Device maximum is 7V on data sheet.
Also my screen shot was not attached. I will try to attach it again.

下载 (599.69 KB)

2024-7-11 12:48

Hope this update includes picture, it is important information.

Richard.

lungchard

Hello All,
I have received my T56 back from XGecu and I can now programme 27011 and 27C011 eproms.
Not sure what they did to the unit but it now works.
The version of app software is 12.68 and the firmware version is 00.1.72.
Not sure if these are updated versions as I do not recall the version numbers from before I sent it back for repair.
Anyway, the good news is it now works.
XGecu assistance with this problem has restored my faith in their after sales service.

Best wishes

Richard,
Thailand.

lungchard

The software versions I have are shown in the attached screen shot.

下载 (361.72 KB)

2024-8-3 16:53

lungchard

You can find the download on the website www.hklrf.comSearch for T56 and you can find download option there.
They are an official XGecu agent and do NOT sell cheap Chinese copies. They sell original genuine product only.