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EN25S20A Datasheet(PDF) 12 Page - Eon Silicon Solution Inc.

Part No. EN25S20A
Description  2 Megabit 1.8V Serial Flash Memory with 4Kbyte Uniform Sector
Download  65 Pages
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Maker  EON [Eon Silicon Solution Inc.]
Homepage  http://www.essi.com.tw
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EN25S20A Datasheet(HTML) 12 Page - Eon Silicon Solution Inc.

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This Data Sheet may be revised by subsequent versions
©2014 Eon Silicon Solution, Inc.,
www.eonssi.com
or modifications due to changes in technical specifications.
12
EN25S20A
Rev. A, Issue Date: 2014/01/16
Table 6. Manufacturer and Device Identification
OP Code
(M7-M0)
(ID15-ID0)
(ID7-ID0)
ABh
71h
90h
1Ch
71h
9Fh
1Ch
3812h
Reset-Enable (RSTEN) (66h) and Reset (RST) (99h)
The Reset operation is used as a system (software) reset that puts the device in normal operating
Ready mode. This operation consists of two commands: Reset-Enable (RSTEN) and Reset (RST).
To reset the EN25S20A the host drives CS# low, sends the Reset-Enable command (66h), and drives
CS# high. Next, the host drives CS# low again, sends the Reset command (99h), and drives CS# high.
The Reset operation requires the Reset-Enable command followed by the Reset command. Any
command other than the Reset command after the Reset-Enable command will disable the Reset-
Enable.
A successful command execution will reset the Status register and the Suspend Status register to data
= 00h, see Figure 6 for SPI Mode and Figure 6.1 for QPI Mode. A device reset during an active
Program or Erase operation aborts the operation, which can cause the data of the targeted address
range to be corrupted or lost. Depending on the prior operation, the reset timing may vary. Recovery
from a Write operation requires more software latency time ( tSR) than recovery from other operations.
Please Figure 6.2.
Figure 6. Reset-Enable and Reset Sequence Diagram
Figure 6.1 . Reset-Enable and Reset Sequence Diagram in QPI Mode


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