S29PL-N_07 SPANSION [SPANSION], S29PL-N_07 Datasheet - Page 70

• Manufacturer Part Number: S29PL-N_07
• Description: 256/128/128 Mb (16/8/8 M x 16-Bit) CMOS, 3.0 Volt-only Simultaneous Read/Write, Page-Mode Flash Memory
• Manufacturer: SPANSION [SPANSION]

13. Common Flash Memory Interface
70
The Common Flash Interface (CFI) specification outlines device and host system software interrogation
handshake, which allows specific vendor-specified soft-ware algorithms to be used for entire families of
devices. Software support can then be device-independent, JEDEC ID-independent, and forward- and back-
ward-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
(BA)555h any time the device is ready to read array data. The system can read CFI information at the
addresses given in Tables
bank, return non-valid data. Reads from other banks are allowed, writes are not. To terminate reading CFI
data, the system must write the reset command.
The following is a C source code example of using the CFI Entry and Exit functions. Refer to the Spansion
Low Level Driver User’s Guide (available at www.spansion.com) for general information on Spansion Flash
memory software development guidelines.
For further information, please see the CFI Specification (see JEDEC publications JEP137-A and
JESD68.01and CFI Publication 100). Please contact your sales office for copies of these documents.
/* Example: CFI Entry command */
/* Example: CFI Exit command */
Addresses
*((UINT16 *)bank_addr + 0x555) = 0x0098;
*((UINT16 *)bank_addr + 0x000) = 0x00F0;
1Ah
10h
11h
12h
13h
14h
15h
16h
17h
18h
19h
0051h
0052h
0059h
0002h
0000h
0040h
0000h
0000h
0000h
0000h
0000h
Data
12.3
S29PL-N MirrorBit
– 12.6) within that bank. All reads outside of the CFI address range, within the
D a t a
Table 13.1 CFI Query Identification String
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)
S h e e t
™
Flash Family
( P r e l i m i n a r y )
/* write CFI entry command
/* write cfi exit command
Description
S29PL-N_00_A5 June 6, 2007
*/
*/