©2011 Silicon Storage Technology, Inc.

S71327-04-000

02/11

11

32 Mbit SPI Serial Flash

SST25VF032B

Data Sheet

A Microchip Technology Company

High-Speed-Read (80 MHz)

The High-Speed-Read instruction supporting up to 80 MHz Read is initiated by executing an 8-bit com-

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 specified

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 highest 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. For example, once the data from address

location 3FFFFFH has been read, the next output will be from address location 000000H.

Figure 6: High-Speed-Read Sequence

Byte-Program

The Byte-Program instruction programs the bits in the selected byte to the desired data. The selected

byte must be in the erased state (FFH) when initiating a Program operation. A Byte-Program instruction

applied to a protected memory area will be ignored.

Prior to any Write operation, the Write-Enable (WREN) instruction must be executed. CE# must remain

active low for the duration of the Byte-Program instruction. The Byte-Program instruction is initiated by

input in order from MSB (bit 7) to LSB (bit 0). CE# must be driven high before the instruction is exe-

the internal self-timed Byte-Program operation. See Figure 7 for the Byte-Program sequence.

Figure 7: Byte-Program Sequence

1327 F07.1

CE#

SO

SI

SCK

ADD.

012 3 4 5

6 7 8

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

MODE 0

MODE 3

78

71 72

1327 F08.0

CE#

SO

SI

SCK

ADD.

012

34

5

6

7

8

ADD.

ADD.

02

HIGH IMPEDANCE

15 16

23 24

31 32

39

MSB

LSB

MODE 3

MODE 0