Details

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BUY AT45DB321E-SHF-T https://www.utsource.net/itm/p/11249057.html

Parameter	Description	Value	Unit
Memory Capacity	Total memory capacity	32 Mbit	-
Organization	Memory organization	4,096 pages x 256 bytes	-
Supply Voltage (Vcc)	Operating voltage range	2.7 to 3.6	V
Supply Current (Active Mode)	Active mode current	10	mA
Supply Current (Standby Mode)	Standby mode current	0.5	μA
Operating Temperature	Operating temperature range	-40 to +85	°C
Storage Temperature	Storage temperature range	-65 to +150	°C
Data Retention	Data retention time	20	years
Programming Time	Page program time	3	ms
Erase Time	Block erase time	20	ms
Package	Package type	SOIC-8	-
Interface	Communication interface	SPI	-
Clock Frequency	Maximum clock frequency	20	MHz

Instructions for Use

1. Power Supply:

   • Ensure the supply voltage (Vcc) is within the specified range of 2.7V to 3.6V.
   • Connect the Vcc pin to the power supply and GND pin to ground.

2. Communication Interface:

   • The AT45DB321E supports SPI communication. Connect the SPI pins (SCK, MOSI, MISO, and CS) to the corresponding pins on your microcontroller or controller.
   • Set the maximum clock frequency (SCK) to 20 MHz for optimal performance.

3. Initialization:

   • Before performing any read or write operations, ensure the device is properly initialized by setting the chip select (CS) pin low.
   • After initialization, you can start sending commands to the device.

4. Reading Data:

   • To read data from a specific page, send the appropriate read command followed by the page address.
   • The device will then transmit the data over the MISO line.

5. Writing Data:

   • To write data to a specific page, first ensure the page is erased if it contains old data.
   • Send the appropriate write command followed by the page address and the data to be written.
   • Wait for the page program time (3 ms) before performing any other operations.

6. Erasing Data:

   • To erase a block of pages, send the appropriate erase command followed by the block address.
   • Wait for the block erase time (20 ms) before performing any other operations.

7. Standby Mode:

   • To reduce power consumption, set the chip select (CS) pin high to enter standby mode.
   • The device will consume only 0.5 μA in standby mode.

8. Temperature Considerations:

   • Ensure the operating temperature is within the specified range of -40°C to +85°C.
   • Store the device in an environment with a temperature range of -65°C to +150°C.

9. Data Retention:

   • The device guarantees data retention for up to 20 years under normal operating conditions.

10. Handling Precautions:

    • Handle the device with care to avoid damage.
    • Follow proper ESD (Electrostatic Discharge) precautions when handling the device.

For detailed command sequences and timing diagrams, refer to the datasheet provided by the manufacturer.

(For reference only)