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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EEPROM, slightly O.T.
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. What’s the deal with the ? Just Beyond the Fringe http: A needed a write pulse longer than uS ,nSbut shorter than 1mS 1,nS. Won’t touch the s I have, though I think it’s an open-source homebrew programmer — you can build it yourself or buy it already built.
Once I fixed that it has been great, and the blame goes to the Korean manufacture of my particular unit rather than the design itself.
The 8-bit CPUs back then all had bit address buses and, therefore, a max memory space of 64K 65, bytes. Number one rule of experimenting is to alway be sure to identify off spec parts to avaoiod re-using them as good ones.
Sometimes 2 extra supplies. At 10mS per byte, it would get quite tiresome. Search Only Within This Topic. Egg on my face. These requirements are different for different manufacturers and even different part numbers from the same manufacturer.
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. There are algorithms coded into the programmers to hit the EPROM with the appropropriate voltages for specific time periods. No contracts, No fees, No Kidding! Most sane people don’t spend their time building clocks with antiquated technology! Back when I just got started in the electronics business, I was working as tech and general slave.
What am I missing here? 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 the first few uses. Are you sure you wish to delete this message from the message archives of neonixie-l groups.
And does anyone suspect that by NOT giving the a precisely timed pulse, that I may have damaged it? Two E’s instead of one Big difference. Thanks anyway for your valuable time. Been there and successfully done both. Most new ones withwrite cycles, before data transfers get iffy. I’ve never used the Willem Programmer, I don’t sell it, etc. The intent for these devices was to hold configuration info, and other field alterable data.
A few months after I got it back, the same thing happened again. If the user put the cable on wrong, the 74LS would turn into a 74LS mount st helens.
Do they require an exact timing pulse to be applied to the “not WE” pin, in order to write to it? Their site has forums that may point you in the right direction. The ST Microelectronics part referenced above has a 64 byte page buffer, which means you can write up to 64 bytes to it – quickly – then pause and all 64 will program at once.
Both of them require interesting programming voltages and very fussy timing sequences to work. Otherwise, you can write single bytes to it, by pausing after each byte.
28C16A-15 – 28C16A 16K 250ns Parallel EEPROM Technical Data
Hello, Forgive this slightly off-topic question: A RAM device, obviously, can be written to, about the same speed as it can be read. It depended on manufacturer.
The Group moderators are responsible for maintaining their community and can address these issues. Reminds me of the Old Apple ][ Disk ][ Drives. That’s why several types of memory had similar pinouts, though hardwire jumpers also had to be set, due to the differences.
It was the 70’s think polyester leisure suits. It’s easy to find info on the 28C It was an ‘ad-hoc’ job, using pre-existing assemblies. What do I need to do, in order to write data to the or 28C16? A ZIF socket was inserted in one of those slots. When I set up my shop a few years ago when I started grad school, I got a programmer from Conitec.