AT25DF021-MH-T Atmel, AT25DF021-MH-T Datasheet - Page 4

• Manufacturer Part Number: AT25DF021-MH-T
• Description: IC FLASH 2MBIT 70MHZ 8UDFN
• Manufacturer: Atmel

Specifications of AT25DF021-MH-T

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 2M (256K x 8)
• Speed: 70MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-UDFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3. Block Diagram
Figure 3-1.
4. Memory Array
4
HOLD
Figure 2-1.
SCK
WP
SO
CS
SI
AT25DF021
Block Diagram
8-SOIC Top View
GND
WP
SO
CS
INTERFACE
CONTROL
LOGIC
AND
1
2
3
4
To provide the greatest flexibility, the memory array of the AT25DF021 can be erased in four lev-
els of granularity including a full chip erase. In addition, the array has been divided into physical
sectors of uniform size, of which each sector can be individually protected from program and
erase operations. The size of the physical sectors is optimized for both code and data storage
applications, allowing both code and data segments to reside in their own isolated regions. The
Memory Architecture Diagram illustrates the breakdown of each erase level as well as the
breakdown of each physical sector.
8
7
6
5
VCC
HOLD
SCK
SI
PROTECTION LOGIC
CONTROL AND
Y-DECODER
X-DECODER
Figure 2-2.
8-UDFN (Top View)
GND
WP
SO
CS
1
2
3
4
AND LATCHES
MEMORY
I/O BUFFERS
Y-GATING
ARRAY
FLASH
8
7
6
5
VCC
HOLD
SCK
SI
DATA BUFFER
SRAM
3677D–DFLASH–04/09