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 Table 8, Table 9 on page 47, and Table 10 on page 48.
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 Table 8, Table 9 on page 47, Table 10 on page 48, and Table 11 on page 49. 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. CFI Query Identification String
Addresses (x16)
Addresses (x8)
Data
Description
10h
11h
12h
20h
22h
24h
0051h
0052h
0059h
Query Unique ASCII string “QRY”
13h
14h
26h
28h
0002h
0000h
Primary OEM Command Set
15h
16h
2Ah
2Ch
0040h
0000h
Address for Primary Extended Table
17h
18h
2Eh
30h
0000h
0000h
Alternate OEM Command Set (00h = none exists)
Address for Alternate OEM Extended Table (00h = none exists)
19h
1Ah
32h
34h
0000h
0000h
46
S29GL-N MirrorBit™ Flash Family
S29GL-N_00_B3 October 13, 2006
SPANSION [ SPANSION ]
