D a t a
S h e e t
Common Flash Memory Interface (CFI)
The Common Flash Interface (CFI) specification outlines device and host system software in-
terrogation 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-in-
dependent, 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, any time the device is ready to read array data. The system can read CFI
information at the addresses given in
and
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
and
The sys-
tem must write the reset command to return the device to reading array data.
For further information, please refer to the CFI Specification and CFI Publication 100, avail-
able via the World Wide Web at http://www.amd.com/flash/cfi. Alternatively, contact your
sales representative for copies of these documents.
Table 8.
Addresses (x16)
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
1Ah
Addresses (x8)
20h
22h
24h
26h
28h
2Ah
2Ch
2Eh
30h
32h
34h
Data
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
CFI Query Identification String
Description
Query Unique ASCII string “QRY”
Primary OEM Command Set
Address for Primary Extended Table
Alternate OEM Command Set (00h = none exists)
Address for Alternate OEM Extended Table (00h = none exists)
46
S29GL-N MirrorBit™ Flash Family
S29GL-N_00_B3 October 13, 2006
SPANSION [ SPANSION ]
