Dataman Forum

I want to programme a Texas Instruments 2708 EPROM chip with my S4 prommer. Please can you support this?

C Kavman

Hi Kavman,

I hav done this..
This simple - select 2716 and ad a 12.1V Zenor from vcc to +25V externol supply.

+25 ----------
|
|
/\
--
|
|
VCC

Bye
Yatoto Sackalotto

i tried this, but nothing happen. i get message vpp setting error. can you suggest what is wrong. i have a 12.1V Zenor connected as shown. do i need to use the red write lead?

C Kavman

Mr Kavman
Add capactor and re-sister.

+25v---|-------
|+ |
--- |
--- ---
| | |
| VCC | | 10Ohm re-sister
-------- | |
--
|
--


I dont no Mr write lead, he sound good guy.

Bye
Yatoto Sackalotto

Hi,

TI 2708 memory requires 3 voltages - +5V,+12V and -5V.
It is NOT possible to program the chip using the method Anonymous has detailed above.
Please, do not attempt this.
The chip also needs proper voltage sequencing.
S4 cannot program it (unless Dataman designs a new module)

Hope this clears things up.

Neil

Mr Neil

you are very wise guy, i learn from you.
use Zenor for read only, programe data int 2716 chip.

you come to my country and make lot money.

ibglatocbacofu TW ltd
Bye
Yatoto Sackalotto