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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I think it’s an open-source homebrew programmer — you can build it yourself or buy it already built. It reads just fine, but it won’t take any new data.
It depended on manufacturer.
When I set up my shop a few years ago when I started grad school, I got a programmer from Conitec. Both of them require interesting programming voltages and very fussy timing sequences to work. Reminds me of the Old Apple ][ Disk ][ Drives. It’s easy to find info on the 28C Chuck Richards Chuck, The is an electrically-erasable version of the So, I decided to do a little experiment: It used an 8-pin TI switching chip to generate the programming voltages.
There are algorithms coded into the programmers to hit the EPROM with the appropropriate voltages for specific time periods.
AT28CPC IC EEPROM 16K NS 24DIP Atmel datasheet pdf data sheet FREE from
There was a most satisfying “BLAM! That’s why several types of memory had similar pinouts, though hardwire jumpers also had to be set, due to the differences. A few months after I got it back, the same thing happened again. Hello, Datahseet this slightly off-topic question: Number one rule of experimenting is to alway be sure to identify off spec parts to avaoiod re-using them as good ones.
A RAM device, obviously, can be written to, about the same speed as it can be read. Writing was a bit different. To go even more off-topic Otherwise, you can write single bytes to it, by pausing after each byte. These datasheeet are different for different manufacturers and even different part numbers from the same manufacturer. What am I missing here?
They are not intended to hold actual program code, even though you could do this. The 8-bit CPUs datashet then all had bit address buses and, therefore, a max memory space of 64K 65, bytes.
28C16A Technical Data
Egg on my face. Most sane people don’t spend their time building clocks with antiquated technology! Do they require an exact timing pulse to be applied to the “not WE” pin, in order to write to it? The intent for these devices was to hold configuration info, and other field dataseet data. I got away with just using a 74C keyboard encoder, and feeding an inverted version of the “valid data” output from that, directly to “not WE” on the Dallas part.
(PDF) 28C16 Datasheet download
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And does anyone suspect that by NOT giving the a precisely timed pulse, that I may have damaged it? D to be more accurate: Mine did arrive with a construction error though, a resistor was the wrong value and caused the programming voltage to be too low and writing would fail most of the time after datashwet first few uses.
Back when I just got started in the electronics business, I was working as tech and general slave. 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 datadheet and a chip. Most new ones withwrite cycles, before data transfers get iffy. Their site has forums that may point you in the right direction. What’s the deal with the ? Datasyeet away without needing a pulse. The Group moderators are responsible for maintaining their community and can address these issues.
This situation was usually handled by either running the whole memory space for the slowest device, or for the fastest memory, and then adding ‘wait-states’ for the slower devices.
A needed a write pulse longer than uS ,nSbut shorter than 1mS 1,nS. A ZIF socket was inserted in one of those slots.
This cannot be undone. Sometimes 2 extra supplies. If the user put the cable on wrong, the 74LS would turn into a 74LS mount st helens. It was an ‘ad-hoc’ job, using pre-existing assemblies.
Your email is included with the abuse report. Anyone familiar with these parts? Search Only Within This Topic. At 10mS per byte, it would get quite tiresome. Again, read the data sheet datasneet and make sure it’s for the exact same device and manufacturer.
If datashewt write to the same address at one write per 10mS, you’d kill that byte in about 20 minutes. Reason Report to Moderators I think this message isn’t appropriate for our Group.