Please refer to data sheets for detailed information. To select how PB3 and PB4 should be used, the jumpers labeled PB3 and PB4 must be set correctly. Description. The AT45DBD is a volt, dual-interface sequential access Flash memory ideally suited for a wide variety of digital voice-, image-, program. Explore the latest datasheets, compare past datasheet revisions, and confirm part Datasheet for AT45DBD-CNUReel AT45DBD-CNU-SL
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Main Memory Page Program through Buffer 1 or 2 datasjeet Therefore not possible to only program the first two bytes of the register and then pro- gram the remaining 62 bytes at a later time.
AT45DBD Datasheet(PDF) – ATMEL Corporation
Page 37 Output Test Load Being able to reprogram the Sector Protection Register with the sector protection enabled allows the user to temporarily disable the sector protection to an individual sector rather than dis- abling sector protection completely.
Main Memory Page to Buffer 1 or datasueet Compare 7.
Read Operations The following block diagram and waveforms illustrate the various read sequences available. Please contact Atmel for the estimated availability of devices with the fix. Unless otherwise specified tolerance: No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted at45dv642d this document or in connection with the sale of Atmel products.
The first 13 bits PA12 – PA0 of the bit address sequence specify at45db642e page of the main memory array to read, and the last 11 bits BA10 – BA0 of the bit address sequence specify the starting byte address within the page.
PUW Changed t from max Sector Lockdown com- mand if necessary. Page 13 Software Sector Protection 8. For the AT45DBD, the four bits are The decimal value of these four binary bits does not dafasheet to the device density; the four bits represent a combinational code relating to differing densities of DataFlash devices The device at45sb642d from a single power supply, 2.
The entire main memory can be erased at one time by using the Chip Erase command. Copy your embed code and put on your site: The busy status indicates that the Flash memory array and one of the buffers cannot be accessed; read and write operations to the other buffer can still be performed. Deep Power-down, the device will return to the normal standby mode. The status of whether or not sector protection has been enabled or disabled by either the software or the hardware controlled methods datasyeet be deter- mined by checking the Status Register.
Page 21 Figure The user is able to configure these parts to a byte page size if desired.
Main Memory Page Read Opcode: The DataFlash is designed to The algorithm will be repeated sequentially for each page within the entire array.
For Atmel and some other manufacturersthe Manufacturer ID data is comprised of only one byte. Parts will have a or SL marked on them Manufacturer ID codes that are two, three or even four bytes long with the first byte s in the sequence being 7FH.
AT45DB642D Datasheet PDF
Page 53 Packaging Information The algorithm above shows the programming of a single page. Download datasheet 2Mb Share this page. The shipping carrier option is not marked on the devices.
This type of algorithm is used for applications in which the entire array is programmed sequentially, filling the array page-by- page page can be written using either a Main Memory Page Program operation or a Buffer Write operation followed by a Buffer to Main Memory Page Program operation. Main Memory Page to Buffer 1 or 2 Transfer 6. Auto Page Rewrite Group C commands consist of: Other algorithms can be used to rewrite portions of the Flash array.
Page 39 Utilizing the RapidS To take advantage of the RapidS function’s ability to operate at higher clock frequencies, a full clock cycle must be used to transmit data back and forth across the serial bus.
Fixed tim- ing is not recommended. Page 31 Table Configuration Register is a user-programmable nonvolatile regis- ter that allows the page size of the main memory to be configured for binary page size bytes or standard DataFlash page size bytes.
To allow for simple in-system reprogrammability, the AT45DBD does not require high input voltages for programming. Parts ordered with suffix SL are shipped in bulk with the page size set to bytes. All other trademarks are the property of their respective owners. To enable the sector protection using the The Sector Protection Register can be reprogrammed while the sector protection enabled or dis- abled. Software Sector Protection 8. Low-power applications may choose to wait until 10, cumulative page erase and program operations have accumulated before rewriting all pages of the sector.
The device density is indicated using bits and 2 of the status register. All program operations to the DataFlash occur on a page by page basis To perform a contin- uous read with the page size set to bytes, the opcode, 03H, must be clocked into the device followed by three address bytes A22 – A To perform a buffer to main memory page program with built-in erase for the Output Test Load