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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Anyone familiar with these parts? It was an ‘ad-hoc’ job, using pre-existing assemblies. The Group moderators are responsible for maintaining their community and can address these issues. Sometimes 2 extra supplies. Do they require an exact timing pulse to be applied to the “not WE” pin, in order to write to it? To go even more off-topic So, I decided to do a little experiment: Otherwise, you can write single bytes to it, by pausing after each byte.

Just Beyond the Fringe http: What do I need to do, in order to write data to the or 28C16? Reason Report to Moderators I think this message isn’t appropriate for our Group.

There are algorithms coded into the programmers to hit the EPROM with the appropropriate voltages for specific time periods.


Egg on my face. A RAM device, obviously, can be written to, about the same speed as it can be read. The 8-bit CPUs back then all had bit address buses and, therefore, a max memory space of 64K 65, bytes.

Hello, Forgive this slightly off-topic question: A ZIF socket was inserted in one of those slots. 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 288c16.

Mine did arrive with a construction error though, a resistor was the datasheft value and caused the programming voltage to be too low and writing would fail most of the time after the first few uses.

28C16 Datasheet PDF

They are not intended to hold actual program code, even though datawheet could do this. No contracts, No fees, No Kidding! That’s why several types of memory had similar pinouts, though hardwire jumpers also had to be set, due to the differences. Chuck 28c166 Chuck, The is an electrically-erasable version of the I’ve never used the Willem Programmer, I don’t sell it, etc. It used an 8-pin TI switching chip to generate the programming voltages.

It depended on manufacturer. There was a most satisfying “BLAM!

Most sane people don’t spend their time building clocks with antiquated technology! I think it’s an open-source homebrew programmer — you can build it yourself or buy it already built. It’s easy to find info on the 28C A few months after I got it back, the same thing happened again. The intent for these devices was to hold configuration info, and other field alterable data. Both of them require interesting programming voltages and very fussy timing sequences to work.


Reminds me of the Old Apple ][ Datzsheet ][ Drives.

28C16 EEPROM used in Commodore and Amiga equipment

This cannot be undone. First hit on google: Back in the late ‘s I had an S based programmer that did ‘s and ‘s.

I got away with just using a 74C keyboard encoder, 2c816 feeding an inverted version of the “valid data” output from that, directly to “not WE” on the Dallas part. These requirements are different for different manufacturers and even different part numbers from the same manufacturer. Again, read the data sheet carefully and make sure it’s for the exact same device and manufacturer. What’s the deal with the ?