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Table 10-4.
AC Characteristics – Serial Interface
Symbol
f SCK (1)
(1)
f CAR
Parameter
SCK Frequency
SCK Frequency for Continuous Array Read
Min
Typ
Max
40
40
Units
MHz
MHz
t WH
t WL
t CS
t CSS
t CSH
t CSB
t SU
t H
t HO
t DIS
t V
t XFR
SCK High Time
SCK Low Time
Minimum CS High Time
CS Setup Time
CS Hold Time
CS High to RDY/BUSY Low
Data In Setup Time
Data In Hold Time
Output Hold Time
Output Disable Time
Output Valid
Page to Buffer Transfer/Compare Time
10
10
250
100
250
3
6
0
150
10
12
350
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
μs
t EP (2)(3)
t P (2)(3)
t PE (2)(3)
t BE (2)(3)
Page Erase and Programming Time
Page Programming Time
Page Erase Time
Block Erase Time
16
8
8
20
50
15
35
100
ms
ms
ms
ms
t RST
t REC
t WPE
t WPD
RESET Pulse Width
RESET Recovery Time
WP Low to Protection Enabled
WP High to Protection Disabled
10
1
1
1
μs
μs
μs
μs
Note:
22
1. Maximum specified frequency for SPI compatibility is 33 MHz.
2. The device uses an adaptive algorithm during program and erase operations. Use the RDY/BUSY bit of the status register or
the RDY/BUSY pin to determine whether the program or erase operation has completed. Fixed timing should not be used.
3. Value are based on device characterization, not 100% tested in production.
AT45DB321C
3387M–DFLASH–2/08
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