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EN25Q40

4 Megabit Serial Flash Memory with 4Kbyte Uniform Sector

Eon Silicon Solution Inc. 

EN25Q40

Figure 7.1 Write Enable/Disable Instruction Sequence under EQIO Mode

Read Status Register (RDSR) (05h)

The Read Status Register (RDSR) instruction allows the Status Register to be read. The Status

Register may be read at any time, even while a Program, Erase or Write Status Register cycle is in

progress. When one of these cycles is in progress, it is recommended to check the Write In Progress

(WIP) bit before sending a new instruction to the device. It is also possible to read the Status Register

continuously, as shown in Figure 8.

The instruction sequence is shown in Figure 8.1 while using the Enable Quad I/O (EQIO) (38h) command.

Figure 8. Read Status Register Instruction Sequence Diagram

This Data Sheet may be revised by subsequent versions

14

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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