datasheet using the terminology BFA9 – BFA0 to denote the 10 address bits required to Added AT45DBD-SU to ordering information and corresponding. Explore the latest datasheets, compare past datasheet revisions, and confirm part lifecycle. AT45DBD-SU Datasheet, 45DB 32M Flash Memory Datasheet, buy AT45DBD-SU.

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Device Operation The device operation is controlled by instructions from the host processor.

All program operations to the DataFlash occur on a page by page basis. Asserting the CS pin selects the device. Standard parts are shipped with the page size set to bytes.

If bit 7 is a 0, then the device is in a busy state. When ending an internally self-timed operation such as a program or erase cycle, the device will not enter the standby mode until the completion of the operation. Other terms and product names may be trademarks of others. Alternatively, look at the code for the PIC24 careful – this is really a zip file, remove. The Enable Sector Protection command and Sector Lockdown command, however, will be recognized by the device when the WP pin is asserted.

Disable Sector Protection commands. Mismatch of the upper and lower dies and resin burrs are not included. Main memory addressing is referenced using the terminology A21 – AO, where A21 – A9 denotes the 13 address bits required to desig- nate a page address and A8 – AO denotes the 9 address bits required to designate a byte address within a page.

A page of data is first transferred from the main memory to buffer 1 or buffer 2, and then the same data from buffer 1 or buffer 2 is programmed back into its original page of main memory. Sector Protection Two protection methods, hardware and software controlled, are provided for protection against inadvertent or erroneous program and erase cycles.

A main memory page read allows the user to read data directly from any one of the 8, pages in the main memory, bypassing both of the data buffers and leaving the contents of the buffers unchanged.


After the last byte of the Security Register has been read, additional pulses on the SCK pin will simply result in undefined data being output on the SO pins. Are there any dtasheet I could attempt? Unless specifically provided otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. The algorithm will be repeated sequentially for each page within the entire array. If a sector is programmed or reprogrammed sequentially page by page, then the programming algorithm shown in Figure page 45 is recommended.

Data is first clocked into buffer 1 or buffer 2 from the input pin SI and then at45db321dd-su into a specified page in the main memory.


The first 13 bits PA12 – PAO of the bit address sequence specify the page in main memory to be read, and the last 10 bits BA9 – BAO of the bit address sequence specify the starting byte address within that page. The standard thickness of the plating layer shall measure between 0. Following the address bytes, one don’t care byte must be clocked in to initialize the read operation. To perform sector 0a or sector Ob erase for the binary page size bytesan opcode of 7CH must be loaded into the device, followed by three address bytes comprised of 2 don’t care bit and 10 page address bits A21 – A12 and 12 don’t care bits.

All inputs are 5 volts tolerant. Read Security Register Group B commands consist of: The device operates from a single power supply, 2. Added the “Legacy Commands” table. Command Sector Lockdown Figure Read Commands By specifying the appropriate opcode, data can be read from the main memory or from either one of the two SRAM data buffers. Thanks for that, I will check out that code tomorrow, I downloaded it today but spent my day installing software on a new pc so didnt get round to having a look yet.


The device is optimized for use in many commercial and industrial appli- cations where high-density, low-pin count, low-voltage and low-power are essential.

AT45DBD-SU Atmel, AT45DBD-SU Datasheet

These signals must rise and fall monotonically and be free from noise. Bit 1 in the Status Register is used to provide information to the user whether or not the sector protection has been enabled or disabled, either by software-controlled datasheett or hardware-con- trolled method.

Determines the true geometric position. Command Resume from Deep Power-down Figure Deep Power-down After initial power-up, the device will default in standby mode. Haven’t received registration validation E-mail?

I am performing memory page read and write operations as per the steps mentioned in datasheet. The SRAM data buffers can be accessed independently from the main memory array, and utiliz- ing the Buffer Read Command allows data to be sequentially read directly from the buffers.

PIC32 -> Atmel SPI Flash Memory (AT45DBD) | Microchip

The Group B commands using buffer 1 should use Group C commands using buffer 2 and vice versa. Once the CS pin has been asserted, the appropriate 4-byte sequence for the Disable Sector Protection command must be clocked in via the input pin SI. Its 34, bits of memory are organized as 8, pages of bytes or bytes each. If bit 0 is a 1, then the page size is set to bytes. When the end of a page in main memory is reached, the device will continue reading back at the beginning of the same page.

After the opcode is clocked in, the 1-byte status register will be clocked out on the output pin SOstarting with the next clock cycle.