AT45DB642D-CNU SL954 Atmel, AT45DB642D-CNU SL954 Datasheet - Page 42

• Manufacturer Part Number: AT45DB642D-CNU SL954
• Manufacturer: Atmel

Specifications of AT45DB642D-CNU SL954

• Density: 64Mb
• Access Time (max): 6ns
• Interface Type: Parallel/Serial-SPI
• Address Bus: 1/8Bit
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: CASON
• Program/erase Volt (typ): 2.7 to 3.6V
• Sync/async: Synchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8b
• Number Of Words: 8M
• Supply Current: 15mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / Rohs Status: Compliant

22.1
22.2
23. Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
42
SI or I/O7 - I/O0
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
(INPUT)
AT45DB642D
SI or I/O7 - I/O0
CS
(INPUT)
CS
BUFFER 1 (1024/1056 BYTES)
represents 8 bits
MAIN MEMORY
PAGE (1024/1056 BYTES)
Each transition
BUFFER 1
BUFFER 1
PAGE TO
READ
CMD
SO
CMD
X
14 DON'T CARE + BFA9-BFA0
BINARY PAGE SIZE
FLASH MEMORY ARRAY
X···X, BFA10-8
I/O INTERFACE
PA12-5
Starts self-timed erase/program operation
MAIN MEMORY
PAGE READ
A22-A10 + 10 DON'T CARE BITS
BFA7-0
BINARY PAGE SIZE
BUFFER 2 (1024/1056 BYTES)
I/O7 - I/O0
PA4-0, XXX
n
Completes writing into selected buffer
MAIN MEMORY
PAGE TO
BUFFER 2
BUFFER 2
READ
n+1
XXXX XX
n = 1st byte read
n+1 = 2nd byte read
Last Byte
3542K–DFLASH–04/09