AT45DB081B-TI-2.5 Atmel, AT45DB081B-TI-2.5 Datasheet - Page 16

• Manufacturer Part Number: AT45DB081B-TI-2.5
• Description: IC FLASH 8MBIT 20MHZ 28TSOP
• Manufacturer: Atmel

Specifications of AT45DB081B-TI-2.5

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 8M (4096 pages x 264 bytes)
• Speed: 20MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.5 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-TSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Write
Operations
Main Memory Page Program through Buffers
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
16
Each transition represents
8 bits and 8 clock cycles
CS
SI
AT45DB081B
CS
SI
PAGE PROGRAM
PAGE (256 BYTES)
BUFFER 1 (256 BYTES)
BUFFER 1 TO
CMD
BUFFER 1
The following block diagram and waveforms illustrate the various write sequences available.
WRITE
CMD
CS
SI
r r r , PA11-7
X
PA6-0, BFA8
CMD
X···X, BFA8
FLASH MEMORY ARRAY
PAGE PROGRAM
THROUGH BUFFER 1
I/O INTERFACE
r r r , PA11-7
THROUGH BUFFER 2
BFA7-0
BFA7-0
PAGE PROGRAM
SI
Starts self-timed erase/program operation
PA6-0, X
n
n
n+1
BUFFER 2 (256 BYTES)
· Completes writing into selected buffer
X
n+1
· Completes writing into selected buffer
· Starts self-timed erase/program operation
BUFFER 2 TO
PAGE PROGRAM
BUFFER 2
WRITE
Last Byte
Last Byte
n = 1st byte read
n+1 = 2nd byte read
2225J–DFLSH–2/08