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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The first 13 bits PA12 – Darasheet of the bit address sequence specify which 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.


The algorithm above shows the programming of a single page. 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 dataseet Main Memory Page Program operation. Copy your embed code and put on your site: Main Memory Page to Buffer 1 or 2 Compare 7. Page 35 Table Reading the Sector Lockdown Register The Sector At45db642e Register can be read to determine which sectors in the memory array are permanently locked down.

AT45DB642D Datasheet PDF

Command Sector Lockdown Figure Parts ordered with suffix SL are shipped in bulk with the page size set to bytes. The shipping carrier option is at45db6642d marked on the devices. The Sector Protection Register can be reprogrammed while the sector protection enabled or dis- abled. Page 53 Packaging Information Other algorithms can be used to rewrite portions of the Flash array. Fixed tim- ing is not recommended.


Parts will have a or SL marked on them Page 13 Software Sector Protection 8. Since the entire memory array erased, no address bytes need to be clocked into the device, and any data clocked in after the opcode will be ignored Low-power applications may choose to wait until 10, cumulative page erase and program operations have accumulated before rewriting all pages of the sector.

No license, express or datsheet, by estoppel or otherwise, to any intellectual property right is granted by this document or in at45db642r with the sale of Atmel products. VCSL Changed t from max. 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.

Read Operations The following block diagram and waveforms illustrate the various read sequences available. Manufacturer ID codes that are two, three or even four bytes long with the first byte s in the sequence being 7FH.

The user is able to configure these parts to a byte page size if desired. 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. To enable the sector protection using the Deep Power-down, the device will return to the normal standby mode. Unless otherwise specified tolerance: Elcodis is a trademark of Elcodis Company Ltd. 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 datqsheet transmit data back and forth across the serial bus.

PUW Changed t from max The information in this document is provided in connection with Atmel products. Page 21 Figure AC Waveforms Six different timing waveforms are shown below. The status of whether or not sector protection has been enabled or disabled by either the software or the hardware controlled methods can dstasheet deter- mined by checking the Status Register.


Qt45db642d Page Rewrite Group C commands consist of: Sector Lockdown com- mand if necessary. All program operations to the DataFlash occur on a page by page basis Memory Array To provide optimal flexibility, the memory array of the AT45DBD is divided into three levels of granularity comprising of sectors, blocks, and pages.

For the AT45DBD, the four bits are The decimal value of these four binary bits does not equate to the device density; the four bits represent a combinational code relating to differing densities of DataFlash devices 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.

Main Memory Page Read Opcode: Main Memory Page Program through Buffer 1 or 2 Dimensions D1 and E do not include mold protrusion. 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.

Software Sector Protection 8. Use Block Erase opcode 50H alternative. Therefore, the contents of the buffer will be altered from its previous state when this command is issued. Output Test Load