26VF064B-ISLASHTD datasheet(17/76 Pages) MICROCHIP

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Advance Information

DS25119C-page 17

SST26VF064B / SST26VF064BA

5.7

SPI Quad-Output Read

The SPI Quad-Output Read instruction supports up to

104 MHz frequency. SST26VF064B requires the IOC

bit in the configuration register to be set to ‘1’ prior to

executing the command. Initiate SPI Quad-Output

Read by executing an 8-bit command, 6BH, followed

by address bits A[23-0] and a dummy byte. CE# must

remain active low for the duration of the SPI Quad

Mode Read. See Figure 5-8 for the SPI Quad Output

Read sequence.

Following the dummy byte, the device outputs data

from SIO[3:0] starting from the specified address loca-

tion. The device continually streams data output

through all addresses until terminated by a low-to-high

transition on CE#. The internal address pointer auto-

matically increments until the highest memory address

is reached, at which point the address pointer returns

to the beginning of the address space.

FIGURE 5-8:

SPI QUAD OUTPUT READ

CE#

SIO0

SCK

012345678

31 32

MODE 3

MODE 0

15 16

6BH

25119 F48.3

39 40 41

A[23:16]

A[15:8]

A[7:0]

b4 b0

b5 b1

b6 b2

b7 b3

SIO1

SIO2

SIO3

Address

OP Code

Data

Byte 0

Dummy

Data

Byte N

Note: MSN= Most Significant Nibble, LSN = Least Significant Nibble

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