Category. Description, 16K 2K x 8 Parallel Eeprom with Software DATA Protection. Company, ST Microelectronics, Inc. Datasheet, Download 28C16 datasheet. It is offered only with the TSOP28 package. The reader should refer to the M28C17 datasheet for more information about the Ready/Busy func- tion. OPERATION. FAST ACCESS TIME: 90ns. SINGLE 5V ± 10% SUPPLY VOLTAGE. LOW POWER CONSUMPTION. FAST WRITE CYCLE: – 64 Bytes Page Write Operation.

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Egg on my face. Most sane people don’t spend their time building clocks with antiquated technology! What do I need to do, in order to write data to the or 28C16? And does anyone suspect that by NOT giving the a precisely timed pulse, that I may have damaged it?

Search Only Within This Topic. Back in the late ‘s I had an S based programmer that did ‘s and ‘s.

(PDF) 28C16 Datasheet download

Won’t touch the s I have, though There was a most satisfying “BLAM! A RAM device, obviously, can be written to, about the same speed as it can be read. It’s easy to find info on the 28C CPU and memory cards where made to accommodate this situation. I have one of those, it works great.

When I set up my shop a few years ago when I started grad school, I got a programmer from Conitec. It was an ‘ad-hoc’ job, using pre-existing assemblies. There are algorithms coded into the programmers to hit the EPROM with the appropropriate voltages for specific time periods. If the user put the cable on wrong, the 74LS would turn into a 74LS mount st helens.

What’s the deal with the ? Your email is included with the abuse report. Otherwise, you can write single bytes to it, by pausing after each byte. If you write to the same address at one write per 10mS, you’d kill that byte in about 20 minutes. The Group moderators are responsible for maintaining their community and can address these issues.


First hit on google: It depended on manufacturer. Been there and successfully done both. The new topic will begin with this message. Two E’s instead of one Big difference. D to be more accurate: So, I decided to do a little experiment: One day A good customer came in the shop all upset that his drive was dead, I hald it to my nose and went to the back to get a screwdriver and a chip.

No contracts, No fees, No Kidding! A few months after I got it back, the same thing happened again. Got 2816 without needing a pulse. Are you sure you wish to delete this message from the message archives of neonixie-l groups.

Again, read the data sheet carefully and make sure it’s for the exact same device and datasheef. You won’t get anywhere without a data sheet for exactly the parts you have, and even then it’s a lot of work to make a programmer that does the job correctly.

Reminds me of the Old Apple ][ Disk ][ Drives. Mine did arrive with a construction error though, a resistor was the wrong value and caused the programming voltage datashewt be too low and writing would fail most of the time after the first few uses.

The ST Microelectronics part referenced above has a 64 byte page buffer, which means you dattasheet write up to 64 bytes to it – quickly – then pause and all 64 will program at once.

To go even more off-topic I think it’s an open-source homebrew programmer — you can build it yourself or buy it already built. Thanks anyway for your valuable time.


It reads just fine, but it won’t take any new data. They are not intended to hold actual program code, even though you could do this. Their 28f16 has datashedt that may point you in the right direction.

Do they require an exact timing pulse to be applied to the “not WE” pin, in order to write to it? It was the 70’s think polyester leisure suits. Both of them require interesting programming voltages and very fussy timing sequences to work.

AT28CPC IC EEPROM 16K NS 24DIP Atmel datasheet pdf data sheet FREE from

The cell voltages are usually monitored and the programming procedure repeated by the programmer until the cells reach specified voltage levels when read back. A needed a write pulse longer than uS ,nSbut shorter than 1mS 1,nS.

What am I missing here? Some as low a ratasheet, However, if you are looking to program EEPROMs, you may get good ideas from the Willem programmer, as it seems to be open-source of some variety. Back when I just got started in the electronics business, I was working as tech and general slave.

Number one rule of experimenting is to alway be sure to identify off spec parts to avaoiod re-using them as good ones.

EEPROM, slightly O.T.

That’s why several types of memory had similar pinouts, though hardwire jumpers also had to be set, due to the differences. This cannot be undone. At 10mS per byte, it would get quite tiresome.