AT25DF021 / ATMEL Corporation - Datenblatt(PDF) Chat AI

AT25DF021 Datasheet with Chat AI

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Part No.	AT25DF021_09
Manufacturer	ATMEL
Size	972 Kbytes
Pages	41 pages
Description	2-Megabit 2.3-volt or 2.7-volt Minimum SPI Serial Flash Memory

Datasheet Summary with AI

1. Device Overview

️· What it is: The AT25DF021 is a 2Mbit (2048Kbyte) flash memory device.
️· Function: It's designed for non-volatile data storage.
️· Interface: It communicates using a SPI (Serial Peripheral Interface).

2. Key Features & Specifications

️· Memory Size: 2 Mbit (2048 Kbytes)
️· Organization: 2048 K x 1024
️· Operating Voltage: 2.3V - 3.6V
️· Maximum Clock Frequency: 66 MHz (for most operations)
️· Address Space: Addresses range from 000000h to 03FFFFh. However, bits A23-A18 are ignored.

3. Command Set and Operations

Command Name Opcode (Hex) Maximum Clock Frequency Address Bytes Dummy Bytes Data Bytes Description

Read Array (0Bh) 0Bh Up to 66 MHz 3 1 1+ Reads data sequentially, address counter increments with each clock cycle. Used for high-speed reads.

Read Array (03h) 03h Up to 33 MHz 3 0 1+ Reads data sequentially, address counter increments with each clock cycle. Used for lower-speed reads.

Block Erase (4Kbytes) 20h Up to 66 MHz 3 0 0 Erases a 4Kbyte block.

Block Erase (32Kbytes) 52h Up to 66 MHz 3 0 0 Erases a 32Kbyte block.

Block Erase (64Kbytes) D8h Up to 66 MHz 3 0 0 Erases a 64Kbyte block.

Chip Erase 60h or C7h Up to 66 MHz 0 0 0 Erases the entire memory chip.

Byte/Page Program 02h Up to 66 MHz 3 0 1+ Programs 1-256 bytes.

Write Enable 06h Up to 66 MHz 0 0 0 Enables write operations.

Write Disable 04h Up to 66 MHz 0 0 0 Disables write operations.

Protect Sector 36h Up to 66 MHz 3 0 0 Protects a specific memory sector from writing.

Unprotect Sector 39h Up to 66 MHz 3 0 0 Unprotects a previously protected sector.

Read Status Register 05h Up to 66 MHz 0 0 1 Reads the status register.

Write Status Register 01h Up to 66 MHz 0 0 1 Writes to the status register. This allows changing device protection modes.

Read Manufacturer and Device ID 9Fh Up to 66 MHz 0 0 1-4 Reads the device's identification information.

Deep Power-Down B9h Up to 66 MHz 0 0 0 Puts the device into a low-power mode.

Resume from Deep Power-Down ABh Up to 66 MHz 0 0 0 Returns the device from deep power down mode.

4. Addressing

️· The memory is addressed using 24-bit addresses (A23-A0).
️· Bits A23 through A18 are ignored during read/write operations. This effectively reduces the addressable range.

5. Important Notes:

️· MSB First: Data is transferred using the Most Significant Bit (MSB) first.
️· CS Pin: The Chip Select (CS) pin controls the activation of the device.
️· Write Protection: The device supports sector protection and global protection modes.
️· Deep Power-Down: Allows for extremely low power consumption when the device is not actively being used.

This summary captures the essence of the provided documentation. If you have specific questions about any aspect of this device, feel free to ask!

Command Name	Opcode (Hex)	Maximum Clock Frequency	Address Bytes	Dummy Bytes	Data Bytes	Description
Read Array (0Bh)	0Bh	Up to 66 MHz	3	1	1+	Reads data sequentially, address counter increments with each clock cycle. Used for high-speed reads.
Read Array (03h)	03h	Up to 33 MHz	3	0	1+	Reads data sequentially, address counter increments with each clock cycle. Used for lower-speed reads.
Block Erase (4Kbytes)	20h	Up to 66 MHz	3	0	0	Erases a 4Kbyte block.
Block Erase (32Kbytes)	52h	Up to 66 MHz	3	0	0	Erases a 32Kbyte block.
Block Erase (64Kbytes)	D8h	Up to 66 MHz	3	0	0	Erases a 64Kbyte block.
Chip Erase	60h or C7h	Up to 66 MHz	0	0	0	Erases the entire memory chip.
Byte/Page Program	02h	Up to 66 MHz	3	0	1+	Programs 1-256 bytes.
Write Enable	06h	Up to 66 MHz	0	0	0	Enables write operations.
Write Disable	04h	Up to 66 MHz	0	0	0	Disables write operations.
Protect Sector	36h	Up to 66 MHz	3	0	0	Protects a specific memory sector from writing.
Unprotect Sector	39h	Up to 66 MHz	3	0	0	Unprotects a previously protected sector.
Read Status Register	05h	Up to 66 MHz	0	0	1	Reads the status register.
Write Status Register	01h	Up to 66 MHz	0	0	1	Writes to the status register. This allows changing device protection modes.
Read Manufacturer and Device ID	9Fh	Up to 66 MHz	0	0	1-4	Reads the device's identification information.
Deep Power-Down	B9h	Up to 66 MHz	0	0	0	Puts the device into a low-power mode.
Resume from Deep Power-Down	ABh	Up to 66 MHz	0	0	0	Returns the device from deep power down mode.