Details

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BUY AT25020AN-10SU-2.7 https://www.utsource.net/itm/p/12610571.html

Parameter	Value/Description
Device	AT25020AN-10SU-2.7
Type	Serial EEPROM
Density	2 Kbits (256 x 8)
Voltage Range	2.7V to 5.5V
Operating Temperature	-40掳C to +85掳C
Data Retention	100 years
Write Cycles	1,000,000 cycles
Page Size	8 bytes
Serial Interface	SPI (Serial Peripheral Interface)
Package	8-SOIC (Small Outline Integrated Circuit)
Speed	10 MHz
Standby Current	1 渭A (max)
Active Current	3 mA (max)
Write Time	5 ms (max)

Instructions for Use:

1. Power Supply:

   • Ensure the supply voltage is within the specified range of 2.7V to 5.5V.
   • Connect VCC to the positive power supply and GND to the ground.

2. SPI Interface:

   • Connect the following pins to your microcontroller:
     • MISO (Master In Slave Out): Data output from the EEPROM.
     • MOSI (Master Out Slave In): Data input to the EEPROM.
     • SCK (Serial Clock): Clock signal from the master.
     • CS (Chip Select): Active low signal to select the device.

3. Initialization:

   • Before any read or write operation, ensure CS is pulled low to select the device.
   • After the operation, pull CS high to deselect the device.

4. Read Operation:

   • Send the Read command (0x03) followed by the address of the first byte to be read.
   • The EEPROM will then send the data on MISO.

5. Write Operation:

   • Send the Write Enable command (0x06) to allow writing.
   • Send the Write command (0x02) followed by the starting address and the data to be written.
   • Wait for the write cycle to complete (up to 5 ms).

6. Status Register:

   • To read the status register, send the Read Status Register command (0x05).
   • To write to the status register, send the Write Status Register command (0x01).

7. Write Protect:

   • The WP pin can be used to protect the EEPROM from accidental writes. Connect it to VCC to enable write protection or to GND to disable it.

8. Power Down:

   • When not in use, set CS high and ensure the device is powered down to minimize current consumption.

9. Handling:

   • Handle the device with care to avoid static damage. Use proper ESD precautions.

10. Storage:

    • Store the device in a dry, cool place to ensure long-term reliability.

For detailed timing diagrams and additional commands, refer to the datasheet provided by Atmel (Microchip).

(For reference only)