EN25Q16A View Datasheet(PDF) - Eon Silicon Solution Inc.

Part Name

Description

Manufacturer

EN25Q16A

16 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)

3015h

(ID7-ID0)

14h

14h

EN25Q16A

Enable Quad Peripheral Interface mode (EQPI) (38h)

The Enable Quad Peripheral Interface mode (EQPI) 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 Peripheral Interface mode (EQPI) (38h)

turns on.

Figure 5. Enable Quad Peripheral Interface mode Sequence Diagram

Reset Quad I/O (RSTQIO) or Release Quad I/O Fast Read Enhancement Mode (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.

User also can use the 0xFFh command to release the Quad I/O Fast Read Enhancement Mode. The

detail description, please see the Quad I/O Fast Read Enhancement Mode section.

Note:

If the system is in the Quad I/O Fast Read Enhance Mode under EQPI Mode, it is necessary to execute

0xFFh command by two times. The first 0xFFh command is to release Quad I/O Fast Read Enhance

Mode, and the second 0xFFh command is to release EQPI Mode.

This Data Sheet may be revised by subsequent versions

13

or modifications due to changes in technical specifications.

©2004 Eon Silicon Solution, Inc.,

Rev. E, Issue Date: 2011/07/14

www.eonssi.com

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