AT45DB011B-XU Atmel, AT45DB011B-XU Datasheet - Page 16

• Manufacturer Part Number: AT45DB011B-XU
• Description: IC FLASH 1MBIT 20MHZ 14TSSOP
• Manufacturer: Atmel

Specifications of AT45DB011B-XU

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 1M (512 pages x 264 bytes)
• Speed: 20MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Write
Operations
Main Memory Page Program through Buffer
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
16
CS
SI
Each transition represents
8 bits and 8 clock cycles
CS
SI
AT45DB011B
CMD
CMD
CS
SI
The following block diagram and waveforms illustrate the various write sequences available.
r ···r , PA8-7
X
PAGE (264 BYTES)
PA6-0, BFA8
X···X, BFA8
CMD
r ···r , PA8-7
BFA7-0
BFA7-0
PAGE PROGRAM
MAIN MEMORY
Starts self-timed erase/program operation
BUFFER (264 BYTES)
FLASH MEMORY ARRAY
BUFFER TO
PA6-0, X
BUFFER
n
I/O INTERFACE
WRITE
n
SI
n+1
· Completes writing into buffer
n+1
X
· Completes writing into buffer
· Starts self-timed erase/program operation
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER
n = 1st byte written
n+1 = 2nd byte written
Last Byte
Last Byte
1984J–DFLASH–06/06