EN25Q40 Ver la hoja de datos (PDF) - Eon Silicon Solution Inc.

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EN25Q40

4 Megabit Serial Flash Memory with 4Kbyte Uniform Sector

Eon Silicon Solution Inc. 

Table 5. Manufacturer and Device Identification

OP Code

ABh

90h

9Fh

(M7-M0)

1Ch

1Ch

(ID15-ID0)

3013h

(ID7-ID0)

12h

12h

EN25Q40

Enable Quad I/O (EQIO) (38h)

The Enable Quad I/O (EQIO) instruction will enable the flash device for Quad SPI bus operation. Upon

completion of the instruction, all instructions thereafter will be 4-bit multiplexed input/output until a

power cycle or “ Reset Quad I/O instruction “ instruction, as shown in Figure 5. The device did not

support the Read Data Bytes (READ) (03h), Dual Output Fast Read (3Bh) and Dual Input/Output

FAST_READ (BBh) modes while the Enable Quad I/O (EQIO) (38h) turns on.

Figure 5. Enable Quad I/O Sequence Diagram

Reset Quad I/O (RSTQIO) (FFh)

The Reset Quad I/O instruction resets the device to 1-bit Standard SPI operation. To execute a Reset

Quad I/O operation, the host drives CS# low, sends the Reset Quad I/O command cycle (FFh) then,

drives CS# high. This command can’t be used in Standard SPI mode.

This Data Sheet may be revised by subsequent versions

12

or modifications due to changes in technical specifications.

©2004 Eon Silicon Solution, Inc.,

Rev. F, Issue Date: 2011/11/02

www.eonssi.com

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