參數(shù)資料
型號(hào): 45DB041B
廠商: Atmel Corp.
英文描述: 4-megabit 2.5-volt Only or 2.7-volt Only DataFlash
中文描述: 4兆位2.5伏,只有2.7伏,只有上DataFlash
文件頁(yè)數(shù): 9/33頁(yè)
文件大?。?/td> 233K
代理商: 45DB041B
17
AT45DB041B
1938F–DFLSH–10/02
Read Operations
The following block diagram and waveforms illustrate the various read sequences
available.
Main Memory Page Read
Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
Buffer Read
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER 2 (264 BYTES)
BUFFER 1 (264 BYTES)
I/O INTERFACE
MAIN MEMORY
PAGE TO
BUFFER 1
MAIN MEMORY
PAGE TO
BUFFER 2
MAIN MEMORY
PAGE READ
BUFFER 1
READ
BUFFER 2
READ
SO
SI
CMD
r r r r, PA10-7
PA6-0, BA8
BA7-0
X
XXX
CS
n
n+1
SO
SI
CMD
r r r r, PA10-7
PA6-0, X
X
Starts reading page data into buffer
CS
SO
SI
CMD
X
XX, BFA8
BFA7-0
CS
n
n+1
SO
X
Each transition represents
8 bits and 8 clock cycles
n = 1st byte read
n+1 = 2nd byte read
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