AT45DB081A-TC Atmel, AT45DB081A-TC Datasheet - Page 14

• Manufacturer Part Number: AT45DB081A-TC
• Manufacturer: Atmel

Specifications of AT45DB081A-TC

• Density: 8Mb
• Access Time (max): 100ns
• Interface Type: Serial (SPI)
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 70C
• Package Type: TSOP-I
• Program/erase Volt (typ): 2.7 to 3.6V
• Sync/async: Synchronous
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Supply Current: 10mA
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / Rohs Status: Not Compliant

Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
Main Memory Page Program through Buffers
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
14
Each transition represents
8 bits and 8 clock cycles
CS
SI
CS
SI
AT45DB081A
PAGE PROGRAM
MAIN MEMORY
PAGE (264 BYTES)
BUFFER 1 (264 BYTES)
CMD
BUFFER 1 TO
BUFFER 1
CMD
CS
WRITE
SI
r r r , PA11-7
X
PA6-0, BFA8
CMD
X···X, BFA8
FLASH MEMORY ARRAY
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER 1
I/O INTERFACE
r r r , PA11-7
THROUGH BUFFER 2
BFA7-0
BFA7-0
PAGE PROGRAM
MAIN MEMORY
SI
Starts self-timed erase/program operation
PA6-0, X
n
n
BUFFER 2 (264 BYTES)
n+1
· Completes writing into selected buffer
X
n+1
· Completes writing into selected buffer
· Starts self-timed erase/program operation
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 2
WRITE
Last Byte
n = 1st byte read
n+1 = 2nd byte read
Last Byte