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DataFlash® FAQs

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Posted	FAQ
Applications
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General
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Applications
01/13/06	Does the WP/pin need a pull up resistor? Can this pin be left floating?
08/18/05	I cannot find the manufacture and device ID of the dataflash parts in the datasheets? How can I identify the device ?
08/18/05	I could not find a RDY/BUSY/ pin on the devices being offered in a 8-lead package. How can I check the RDY/BUSY status on these devices ?
08/18/05	Does Atmel offer a 5v version of the dataflash. Are the inputs of the 3v DataFlash 5v tolerant ?
08/17/05	What happens if I lose power during a program or erase operation?
08/16/05	What is the function of the SER/PAR/ pin on the AT45DB642 DataFlash device? Is there any advantage if I switch between the two ports?
08/16/05	What is the difference between SPI mode 3 and inactive clk polarity high ? Is there any difference between SPI mode 0 and inactive clk polarity low?
08/16/05	What is the difference between B and non-B version DataFlash parts?
08/16/05	Can I use the auto page rewrite command to modify multiple bytes within a page or multiple pages of data in a random fashion?
08/16/05	Can I modify a few bytes in the dataflash memory without erasing a page ?
08/16/05	My system is noisy. Can that adversely effect the DataFlash operation ?
08/16/05	I have noticed that the max program and erase times of the AT45DB321C are significantly higher than the AT45DB321B. What is the reason for this variation ?
08/16/05	Are the Dataflash cards compatible with the MMC cards ?
08/16/05	Can I tie the RDY/Busy/ outputs of several data flash devices together? Can this pin be left floating?
08/16/05	What is the difference between a No connect (NC) pin and a Don't Connect (DC) pin?
08/16/05	Can I tie the SI and SO pins together?
08/16/05	How can I prevent inadvertent writes to the dataflash during a power up sequence ?
08/16/05	What is the WP/ pin used for?
08/16/05	How is Icc measured? What is the difference between Icc and Isb? Why are there two different values for Isb?
08/16/05	After power is applied to the dataflash, can I access the flash immediately or is there any timing constraint associated with the power on delay?
08/16/05	What is the difference between data retention and endurance?
08/16/05	Do I need to reset the DataFlash during normal program and erase operations. Does the RESET/ pin need a pull up resistor. Can this pin be a no connect?
08/16/05	What is the Reset Recovery time?
08/16/05	How long should the RESET/ pin be enabled in order to reset the DataFlash?
08/16/05	If I reset the device using RESET/ pin, what happens to the contents of the SRAM buffers?
08/16/05	If I reset the device using RESET/, What happens to the data being written to the flash array?
08/16/05	Do I need to update each page of the DataFlash sector within every 10,000 cumulative page erase/ program operations if I am updating the contents of the data flash sequentially?
08/16/05	What is the erased data state? What is the programmed data state?
08/16/05	Why is the page and buffer size 264 bytes instead of the standard 256 bytes?
08/16/05	Do I need to have an SPI port in my system to interface to the DataFlash?
08/16/05	Do the buffers on the data flash allow receiving of data while a page in the main memory is being reprogrammed?
08/16/05	How is the DataFlash different from standard Flash?
Packaging
Posted	FAQ
12/05/08	What is a green package?
Availability
Posted	FAQ
08/16/05	How can I obtain the Data Flash Software Suite (DFSS) ?
08/16/05	Does Atmel offer DataFlash devices in a lead free package ? What is the designator for the lead free Packaging Option?
08/16/05	Does Atmel offer DataFlash devices in a green package ? What is the designator for the Green (Pb/Halide-free) Packaging Option?
08/16/05	How can I obtain a die-map for NVM parts ?
General
Posted	FAQ
08/16/05	My programmer does not support a particular part or package. What can I do?
08/16/05	Does Atmel recommend a specific programmer manufacturer? Where can I get a list of programmers?
08/16/05	How can I get parts programmed with my code?
08/16/05	What is the difference between a volatile and nonvolatile memory?
08/16/05	What is the difference between commercial, extended commercial and industrial devices?