| T O P I C R E V I E W |
| Xander |
Posted - 02/05/2009 : 23:03:03
Hi,
I am on Windows Vista and I use a GQ-4x bought 2 months ago. I recently started using EPROM of type AT27c080.
I successfully wrote on AT27c080 3 times, using the general device '27c080' but suddenly it stopped working. Whatever I try, I get errors.
If I try a blank check, I immediatly get this error (whatever I set the speed to):
Blank checking...Code Memory
Elapsed time: 0.46 seconds.
Device blank check failed at address: 0x000000, Read= 0x00.
Blank check failed
If I try to write, I immediately get this error (whatever I set the speed to):
Writing...
Elapsed time: 2.58 seconds.
Time:01:23:01
Write failed, Address=0x000000, Buffer=0x78 Device=0x00
Write failed
When I try to read the data, it doesn't make errors, but everything is 00. I tried with over 10 different chips of type AT27c080, I always get the same result, I doubt I have over 10 chips failing on me.
Do you guys have any idea what is wrong? |
| 5 L A T E S T R E P L I E S (Newest First) |
| Xander |
Posted - 02/06/2009 : 10:54:10
Alright I will contact them, hope they can do something about it =/ |
| ZLM |
Posted - 02/06/2009 : 10:28:17
I think the programmer needs a hardware service. Please write to support@mcumall.com for product warranty. |
| Xander |
Posted - 02/06/2009 : 09:20:57
Q#1: Did you erased the chip?
A#1: Yes I tried to erase all the chip, multiple time.
Q#2: Does the VCC red LED on when you read the EPROMs?
A#2: Not it doesn't, only the light for the LED 'ON' stay lighted up, both VPP and VCC stays off.
Q#3. It seems the ZIF socket lost VCC when read/write. When doing read, check the voltage on 27C080 pin 16 and pin 32 to GROUND(USB plug metal shell).
A#3: I'm not extremely experienced with using my multimeter, so I'm not sure I took my measure correctly. I've set my multimeter to test 20V and I placed my check on the pin 16 and on the metal shell of the USB plug that is connected to my laptop (and not the one connected to the programmer). I get these measure:
Pin 16 -> Metal shell of USB plug
When reading: 0.09
When not reading: 0.08
Pin 32 -> Metal shell of USB plug
When reading: 2.04
When not reading: 4.37 |
| ZLM |
Posted - 02/06/2009 : 08:49:52
1. Did you erased the chip?
2. Does the VCC red LED on when you read the EPROMs?
3. It seems the ZIF socket lost VCC when read/write. When doing read, check the voltage on 27C080 pin 16 and pin 32 to GROUND(USB plug metal shell). |
| Xander |
Posted - 02/06/2009 : 07:27:14
Tried out this morning with an M27c2001, same problems =/ Getting a bit discouraged. |
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