AT45DB081B-CI-2.5 Atmel, AT45DB081B-CI-2.5 Datasheet - Page 16
AT45DB081B-CI-2.5
Manufacturer Part Number
AT45DB081B-CI-2.5
Description
IC FLASH 8MBIT 20MHZ 14CBGA
Manufacturer
Atmel
Datasheet
1.AT45DB081B-CC.pdf
(33 pages)
Specifications of AT45DB081B-CI-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
14-CBGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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