MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 MCUmall Forums
 TOP USB Programmer
 2716 question

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

Screensize:
UserName:
Password:
Format Mode:
Format: BoldItalicizedUnderlineStrikethrough Align LeftCenteredAlign Right Horizontal Rule Insert HyperlinkInsert EmailInsert Image Insert CodeInsert QuoteInsert List Spell Checker
   
Message:

* HTML is OFF
* Forum Code is ON
Smilies
Smile [:)] Big Smile [:D] Cool [8D] Blush [:I]
Tongue [:P] Evil [):] Wink [;)] Clown [:o)]
Black Eye [B)] Eight Ball [8] Frown [:(] Shy [8)]
Shocked [:0] Angry [:(!] Dead [xx(] Sleepy [|)]
Kisses [:X] Approve [^] Disapprove [V] Question [?]

   Insert an Image File
Check here to include your profile signature.
    

T O P I C    R E V I E W
someone Posted - 02/24/2005 : 11:39:55
I attempted to burn a 2716 Eprom ends in an ERROR! Have you some tips for the 2716?
6   L A T E S T    R E P L I E S    (Newest First)
rv Posted - 05/21/2006 : 23:14:43
thank you very much for your answer, but, where can I find this old version ?
ZLM Posted - 04/24/2006 : 01:14:43
It seems there is a software bug.Never write the 2716 EPROMs.
Tested old version software, before the Re1.28. Those versions still got another small bug, but write OK. Every new opened W/R window only be able to read once. You need close and then open the W/R window to read again.

Select 2716-25V.
rv Posted - 04/23/2006 : 11:17:35
Yes I have tryed the 2.10 version.
ZLM Posted - 04/20/2006 : 20:55:16
Did you try latest software?
rv Posted - 04/16/2006 : 02:31:58
I can't write 2716 with my top2005


I have an USB Hub (current rate is 10 !)
I have tested with windows 98 and XP

I have tryed with severals type of 2716 :

HN462716G
AM2716DC (AMD)
MB2716 (fujitsu)

With high and low speed, it's the same, the Eprom remain blank.

Help !!!
mcumall Posted - 02/24/2005 : 11:42:19
Most likely the problem is related to DC current.

I knew there are couple of tips on those old NMOS type EPROMs.

1. The 2716 is made in old NMOS technology. It will consume very high DC current than CMOS chip. The 2716 may need up to 200mA programming current. But CMOS 27C16 chip will only need about 20mA current.
2. Due to a higher current is needed to program a NMOS chip, so the pin need to be very clean. The higher contacting resistance only reduce the DC current. This will fail the programming.
3. There are different Vpp for the different chip. Please confirm your chip's programming voltage(Vpp) is correctly selected. The 2716's Vpp can be either 12.7V, 21V and 25V. Incorrect Vpp selecting also fails the programming.
4. Check the USB current from software menu. The current grade reading should be at least 6 or 7. If not you USB port may not provide enough DC current. You need try use a external DC power supply. Since the TOP2005 has no DC jack. So you may connect it to a DC powered USB hub to get higher DC current.
5. Try to read a 2716 see if the reading OK.

Please note, the chip position diagram is located at the left side of ZIF coscket. On the programmer case.

MCUmall EPROM BIOS Chip Burner Forum © Copyright 2003 - 2009 Mcumall Electronics Inc. Go To Top Of Page
Generated in 0.09 sec. Snitz Forums 2000