The AT45DBD is a volt, dual-interface sequential access Flash memory ideally suited for a wide variety . CNU = 8-lead, 6 x 8 mm CASON. T = lead. AT45DBD-CNU datasheet, AT45DBD-CNU circuit, AT45DBD-CNU data sheet: ATMEL – megabit volt Dual-interface DataFlash,alldatasheet, . AT45DBD-CNU – Flash Memory, Serial NOR, 64 Mbit, Pages x. Add to compare. Image is for Technical Datasheet: AT45DBD-CNU Datasheet.
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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. Read Operations The following block diagram and waveforms illustrate the various read sequences available. Slave clocks out BYTE a first output byte.
Output Test Load Use Block Erase opcode 50H alternative. Download datasheet 2Mb Share this page. Dimensions D1 and E do not include mold protrusion. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. 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 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.
All other trademarks are the property of their respective owners. Command Sector Lockdown Figure Auto Page Rewrite Group C commands consist of: For Atmel and some other manufacturersthe Manufacturer ID data is comprised of only one byte.
Parts will have a or SL marked on them Page 21 Figure Master clocks in BYTE h last output byte. PUW Changed t from max Main Memory Page Read Opcode: Fixed tim- ing is not recommended.
Software Sector Protection 8. The user is able to configure these parts to a byte page size if desired.
AT45DBD-CNU Atmel, AT45DBD-CNU Datasheet
The first 13 bits PA12 – PA0 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. VCSL Changed t from max. The surface finish of the package shall be EDM Charmille The algorithm will be repeated sequentially for each page within the entire array.
Page 35 Table Main Memory Page Program through Buffer 1 or 2 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. Manufacturer ID codes that are two, three or even four bytes long with the first byte s in the sequence being 7FH.
Other algorithms can be used to rewrite portions of the Flash array. 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 operates from a single power supply, 2.
Page 53 Packaging Information To allow for simple in-system reprogrammability, the AT45DBD does not require high input voltages for programming. The Block Erase function is not affected by the Chip Erase issue. Main Memory Page to Buffer 1 or 2 Compare 7. The Sector Protection Register can be reprogrammed while the sector protection enabled or dis- abled.
The entire main memory can be erased at one time by using the Chip Erase command. Standard dataheet are shipped with the page size set to bytes. Copy your embed code and put on your site: Unless otherwise specified tolerance: Deep Power-down, the device will return to the normal standby mode. 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.
All program operations to the DataFlash occur on a page by at45d6b42d-cnu basis Therefore, the contents of the buffer will be altered from its previous state when this command is issued. AC Waveforms Six different timing waveforms are shown below. Sector Lockdown com- mand if necessary. Command Resume from Deep Power-down Figure