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EN39SL800 Datasheet(PDF) 11 Page - Eon Silicon Solution Inc.

Part No. EN39SL800
Description  8 Megabit (512K x 16-bit) Flash Memory With 4Kbytes Uniform Sector, CMOS 1.8 Volt-only
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Maker  EON [Eon Silicon Solution Inc.]
Homepage  http://www.essi.com.tw
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EN39SL800 Datasheet(HTML) 11 Page - Eon Silicon Solution Inc.

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This Data Sheet may be revised by subsequent versions
©2004 Eon Silicon Solution, Inc.,
www.eonssi.com
or modifications due to changes in technical specifications.
11
EN39SL800
Rev. H, Issue Date: 2011/02/14
COMMON FLASH INTERFACE (CFI)
The Common Flash Interface (CFI) specification outlines device and host systems software interrogation
handshake, which allows specific vendor-specified software algorithms to be used for entire families of
devices. Software support can then be device-independent, JEDEC ID-independent, and forward- and
backward-compatible for the specified flash device families. Flash vendors can standardize their existing
interfaces for long-term compatibility.
This device enters the CFI Query mode when the system writes the CFI Query command, 98h, to address
55h in word mode, any time the device is ready to read array data.
The system can read CFI information at the addresses given in Tables 5-7. In word mode, the upper
address bits (A7–MSB) must be all zeros. To terminate reading CFI data, the system must write the reset
command.
The system can also write the CFI query command when the device is in the autoselect mode. The device
enters the CFI query mode and the system can read CFI data at the addresses given in Tables 5–8. The
system must write the reset command to return the device to the autoselect mode.
Table 5. CFI Query Identification String
(1)
Adresses
(Word Mode)
Data
Description
10h
11h
12h
0051h
0052h
0059h
Query Unique ASCII string “QRY”
13h
14h
0002h
0000h
Primary OEM Command Set
15h
16h
0040h
0000h
Address for Primary Extended Table
17h
18h
0000h
0000h
Alternate OEM Command set (00h = none exists)
19h
1Ah
0000h
0000h
Address for Alternate OEM Extended Table (00h = none exists)
1. Refer to CFI publication 100 for more details.


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