bits of contiguous EEPROM memory. The device is available in the standard 8- pin PDIP, 8-pin SOIC ( mm), 8-pin 2×3 DFN and TDFN, 8-pin MSOP and. DataSheet: PDF icon Serial EEPROM 24Cpdf. AT24C02 is an electrically erasable and programmable ROM. It has a 2Kbits of memory size arranged in 32 . edge clock data into each EEPROM device and negative edge clock Part of the Array Protected. 24C01A. 24C 24C 24C 24C At VCC. Full (1K).

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And indeed, you are quit right, of course. A2 are used for creating the address. Also be aware that the A0 to A2 pins on the device package are meant to remain static ewprom a design.

That’s why I said “write”. Skip to main content. Sign up using Email and Password. You do not write the addresses; you hardwire them.

Serial EEPROM AT24C02

In figure 4 they refer to the address as an 8-bit quantity:. The device will not respond to the address that is being set dynamically. Arduino based GPS receiver. Maybe the issue is setting the address after power on. This output is from I2C scanner.


24C02 Datasheet(PDF) – STMicroelectronics

On top of that I have never been sure that it is even possible to dynamically change the strapped value on the A0, A1 and A2 pins of a 24C02 after it has powered up. Normally there is no writing to the 24C02 pins. When data is to be read or write, first a start condition is created followed by device address, byte address and the data itself.

This last bit is 1 for write and 0 for read operation. Thus here it is: You give the I2C device an address, and then immediately say “have you got any data”? I speak for myself, not Arduino. Interface GPS with Arduino. Can you explain what hardwiring is?

Finally a stop condition is provided. Check your chips markings. I understand perfectly your point, AWOL.

But that does not make them available Sign up using Facebook. The data is read or written between the start and stop conditions on every transition of SCL from high to low. I will try in about an hour.

Post Your Answer Discard By clicking sbeet Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Reading the datasheet gave me the wrong impression that I could get away with being impatient. You didn’t want it last time, but I saved it for you anyway. If a dat of eight 24C02’s are used in the design then each of the devices will have these three pins hard strapped in a different combination from the set of b, b, b, b, b, b, b and b.


Can you give more information? The data is transferred and received serially through serial data SDA pin. It considers the value of the A0,A1 and A2 before the power up and sticks to it till shet.

So for example you keep A0: Instead the three bits that you supply out on the interface in the device address field must match the hard strapped values on the pins in order for the device to be selected. When you say that you are “writing” to the pins this does not make clear exactly what you are doing.

Similarly for read operation the device address to be sent is 0xA0 MaNyYaCk 6