Description:The AT25XV021A is a member of our System Enhancing class of code and data storage solutions with an extended operating range up to 4.4V. It is designed for all system memory tasks ranging from boot/code shadowing to data logging and includes the 256-byte page Erase feature that enables efficient, lower energy datalogging.
The recommended operating voltage range for the AT25XV021A-MAHV-T is 2.7V to 3.6V, as specified in the datasheet. However, it's essential to note that the device can operate down to 2.5V, but with reduced performance and reliability.
During power-up, the HOLD# pin should be kept high until the power supply voltage reaches the minimum operating voltage (2.7V). During power-down, the HOLD# pin should be kept low to prevent any unwanted writes or accesses to the device.
The AT25XV021A-MAHV-T supports up to 100,000 write cycles per sector, with a total of 4,096 sectors. This means the device can withstand a total of approximately 409,600,000 write cycles (100,000 cycles/sector * 4,096 sectors).
To securely erase the AT25XV021A-MAHV-T, use the Chip Erase command (0xC7) followed by a Write Enable command (0x06). This will erase the entire device, including the security registers. Note that this procedure should only be performed when the device is not in use, as it will render all data inaccessible.
The WP# (Write Protect) pin is used to prevent writes to the status register and the security registers. When WP# is low, writes to these registers are allowed. When WP# is high, writes are blocked. It's recommended to tie WP# to VCC or use an external pull-up resistor to ensure writes are protected.
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AT25XV021A-MAHV-T Overview
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