25LC Kbit SPI Bus Serial EEPROM The Microchip Technology Inc. 25AA/25LC *? Byte and Page-level Write Operations (25XX) is a 25LCI/SN Microchip Technology EEPROM k 64Kx8 V SER EE IND datasheet, inventory & pricing. 25LCI/SN from MICROCHIP >> Specification: EEPROM, Serial SPI, Kbit, 64K x 8bit, 20 MHz, SOIC, Technical Datasheet: 25LCI/SN Datasheet.

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Interfacing a Serial EEPROM Using SPI

We end the setup function by sending the word “hi” plus a line feed out the built in serial port for debugging purposes. Status registers change their state based on various microcontroller conditions. Hi Nick, It seems to me that the ns from the datasheet is the minimum time delay needed for it to work.

The reason may just be the status bit that ksdoubleshooter kindly pointed out. These modes control whether data is shifted in and out on the rising or falling edge of the data clock signal, and whether the clock is idle when high or low.

While the delays may allow your code to work, I don’t think that’s the proper solution. Since this is undesirable most of the time, the code below makes the page boundaries transparent for write operations.

Create free account Forgot password? It can only be written bytes at a time, but it can be read bytes at a time. All times are GMT – 6 Hours.

lpc | LPC SPI assistance with 25LC EEPROM

Is this correctly read? I have to find out how to use timers as delays, for milliseconds using system tick isn’t going to cut it.


Note that the chip on the Arduino board contains an internal EEPROM, so follow this tutorial only if you need more space than it provides.

Display posts from previous: I see what appears to be pulse more like sloped triangles.

25LC pdf datasheet-电子发烧友网

Some general point to narrow your error: Very helpful with SPI! I keep looking into it, but if you notice anything else or have any other suggestions please let me know.

A register is just a byte of microcontroller memory that can be read from or written to. CCS does not monitor this forum on a regular basis. The device is enabled by pulling the Chip Select CS pin low. Fri Jul 20, 9: Hey bro this worked like a charm for me. From the datasheet, the delay has to be about ns. Have you checked if data is sent? There are status bits that can be used to pace the rate at which you feed new data to the SSP. Please do not post bug Reports on this forum.

It can also be used for communication between two microcontrollers. Underneath that they have configured P2.

Sign in Sign 25lc5512 Remember me Forgot username or password? Last edited by treitmey on Fri Jul 20, Additionally, I did create a ns and microsecond delay functions I can also test as well, but I’ll try the ms delay with the system tick first.

Your email address will not be published. Have you checked the data which is received?


The device also offers various degerees of write protection and a hold pin, but we won’t be covering those in this tutorial. Here is a simple layout of the dataeheet Instead of a byte by byte insertion on the 25LC,since its write cycles count per page as i understand it Serial Peripheral Interface SPI is a synchronous serial data protocol used by Microcontrollers for communicating with one or more peripheral devices quickly over short distances.

Hello Nick, here are some dataasheet, i have seeing in your listing: Generally speaking there are three modes of transmission numbered 0 – 3. Chronological Newest First Hey guys, I’m in a bit of a bind. Previous 1 2 Next.

25LC512 Datasheet PDF

Insert the AT25HP chip into the breadboard. Once you have your SPI Control Register set correctly you just need to figure out how long xatasheet need to pause between instructions and you are ready to go.

When doing a write of less than bytes the data in the rest of the page is refreshed along with the data bytes being written. Leave a Reply 25c512 reply Your email address will not be published. This way if our data comes out looking funny later on we can tell it isn’t just the serial port acting up:. Thank you for the reply Martin.