SST25VF020B データシートの表示（PDF） - Microchip Technology

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SST25VF020B

2 Mbit SPI Serial Flash

Microchip Technology 

A Microchip Technology Company

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 [A23-A0] 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.

CE#

MODE 3 0 1 2 3 4 5 6 7 8 15 16 23 24 31 32 39 40 47 48 55 56 63 64 71 72 80

SCK MODE 0

SI

0B

ADD. ADD. ADD.

X

MSB

MSB

SO

HIGH IMPEDANCE

N

DOUT

MSB

Note: X = Dummy Byte: 8 Clocks Input Dummy Cycle (VIL or VIH)

N+1

DOUT

N+2

DOUT

N+3

DOUT

N+4

DOUT

1417 HSRdSeq.0

Figure 6: High-Speed-Read Sequence

©2011 Silicon Storage Technology, Inc.

12

S71417-03-000

02/11

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