AT45DB021D ATMEL [ATMEL Corporation], AT45DB021D Datasheet - Page 40
AT45DB021D
Manufacturer Part Number
AT45DB021D
Description
2-megabit 2.7-volt DataFlash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT45DB021D.pdf
(52 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT45DB021D-MH
Manufacturer:
ATMEL
Quantity:
1 650
Part Number:
AT45DB021D-MH
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT45DB021D-MH-T
Manufacturer:
EPCOS
Quantity:
34 000
Company:
Part Number:
AT45DB021D-SH
Manufacturer:
ATMEL
Quantity:
320
Part Number:
AT45DB021D-SH
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT45DB021D-SH-B
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT45DB021D-SH-T
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT45DB021D-SSH
Manufacturer:
ATMEL
Quantity:
3 500
Part Number:
AT45DB021D-SSH
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
23. Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
23.1
23.2
40
SO (OUTPUT)
Main Memory Page Read
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
SI (INPUT)
AT45DB021D [Preliminary]
SO (OUTPUT)
SI (INPUT)
CS
CS
MAIN MEMORY
PAGE (256/264 BYTES)
BUFFER (256/264 BYTES)
PAGE TO
BUFFER
BUFFER
CMD
READ
ADDRESS FOR BINARY PAGE SIZE
CMD
A17-A16
PA9-7
FLASH MEMORY ARRAY
PA6-0, BA8
A15-A8
I/O INTERFACE
6 DON’T CARE BITS + A17-A8 + 8 DON'T CARE BITS
X···X, PA9-7
SO
A7-A0
BA7-0
MAIN MEMORY
PAGE READ
BINARY PAGE SIZE
X
4 Dummy Bytes
PA6-0, X
Starts reading page data into buffer
X
XXXX XXXX
n
n+1
3638B–DFLASH–02/07