Datasheet

©2013 Silicon Storage Technology, Inc. DS20005054C 04/13
12
2 Mbit SPI Serial Flash
SST25VF020B
Data Sheet
High-Speed-Read (80 MHz)
The High-Speed-Read instruction supporting up to 80 MHz Read is initiated by executing an 8-bit com-
mand, 0BH, followed by address bits [A
23
-A
0
] and a dummy byte. CE# must remain active low for the
duration of the High-Speed-Read cycle. See Figure 6 for the High-Speed-Read sequence.
Following a dummy cycle, the High-Speed-Read instruction outputs the data starting from the speci-
fied address location. The data output stream is continuous through all addresses until terminated by a
low to high transition on CE#. The internal address pointer will automatically increment until the high-
est memory address is reached. Once the highest memory address is reached, the address pointer
will automatically increment to the beginning (wrap-around) of the address space. Once the data from
address location 3FFFH has been read, the next output will be from address location 00000H.
Figure 6: High-Speed-Read Sequence
1417 HSRdSeq.0
CE#
SO
SI
SCK
ADD.
012345678
ADD. ADD.0B
HIGH IMPEDANCE
15 16 23 24 31 32 39 40
47 48 55 56 63 64
N+2 N+3 N+4
N
N+1
X
MSB
MSB
MSB
MODE 0
MODE 3
D
OUT
D
OUT
D
OUT
D
OUT
80
71 72
D
OUT
Note: X = Dummy Byte: 8 Clocks Input Dummy Cycle (V
IL
or V
IH
)