AT45DB642D-CU Atmel, AT45DB642D-CU Datasheet - Page 42

• Manufacturer Part Number: AT45DB642D-CU
• Description: IC FLASH MEM 64MBIT 66MHZ 24BGA
• Manufacturer: Atmel

Specifications of AT45DB642D-CU

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 64M (8192 pages x 1056 bytes)
• Speed: 66MHz
• Interface: Parallel/Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-CBGA
• Lead Free Status / RoHS Status: Lead free / RoHS 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