22 Jul
2004
22 Jul
'04
8:30 a.m.
On 2004-Jul-22 13:09:46 Wolfgang wrote:
Mentioned TMS2532 Eproms are one of these Unobtainiums here.
I've had better
luck finding Hitachi's HN462532G version here... in Canada.
That may be worth checking for.
Looking at the Pinouts I have in my databooks there
are
little (minor?) Differences to the standard 2732's (besides
the different Program Supply Voltage). I couldn't find much
2732 and 2532
program at +25V, 2732A programs at +21V. +25V is fatal to
2732A. Don't ask me how I know that.
ressources online, but would it work if I made a
small
adapter like "illustrated" below...
2732 2532
EPROM -> SOCKET
Pin(s) Pin(s)
1-17 -> 1-17
18 (E) -> 20 (PD/PGM)
19(A10)-> 19 (A10)
20(GVpp)> 21 (Vpp)
No. The 2532 Vpp is always +5V when reading, and would keep
2732 outputs
always OFF. The 2532 has just one enable pin, while the 2732 has two.
Better to tie 2732-20 to 2532-18 (or to GND - outputs would be always
enabled when the chip is selected).
21(A11)-> 18 (A11)
22-24 -> 22-24
Please correct me, if I'm completely wrong and trying to do
something impossible.
Impossible? Nothing's impossible. Messy and difficult,
maybe.
2732's would be easy to obtain, and I have some
prommer-schematics and software handy. So it would be cool
if I could use them.
Regards,
Wolfgang
At VCF East 2.0 I brought along an EPROM programmer and some blank 2532s...
not that you would have considered that to be East at all... ;o)
Best of luck,
Bob