s29gl01gs Meet Spansion Inc., s29gl01gs Datasheet - Page 13

• Manufacturer Part Number: s29gl01gs
• Manufacturer: Meet Spansion Inc.

2.2
March 21, 2011 S29GL_128S_01GS_00_02
2.2.1
Device ID and CFI (ID-CFI) ASO
Device ID
Note: These tables have been condensed to show sector related information for an entire device on a single
page Sectors and their address ranges that are not explicitly listed (such as SA001-SA510) have sectors
starting and ending addresses that form the same pattern as all other sectors of that size. For example, all
128 kB sectors have the pattern XXX0000h-XXXFFFFh.
There are two traditional methods for systems to identify the type of flash memory installed in the system.
One has traditionally been called Autoselect and is now referred to as Device Identification (ID). The other
method is called Common Flash Interface (CFI).
For ID, a command is used to enable an address space overlay where up to 16 word locations can be read to
get JEDEC manufacturer identification (ID), device ID, and some configuration and protection status
information from the flash memory. The system can use the manufacturer and device IDs to select the
appropriate driver software to use with the flash device.
CFI also uses a command to enable an address space overlay where an extendable table of standard
information about how the flash memory is organized and operates can be read. With this method the driver
software does not have to be written with the specifics of each possible memory device in mind. Instead the
driver software is written in a more general way to handle many different devices but adjusts the driver
behavior based on the information in the CFI table.
Traditionally these two address spaces have used separate commands and were separate overlays.
However, the mapping of these two address spaces are non-overlapping and so can be combined in to a
single address space and appear together in a single overlay. Either of the traditional commands used to
access (enter) the Autoselect (ID) or CFI overlay will cause the now combined ID-CFI address map to appear.
The ID-CFI address map appears within, and overlays the Flash Array data of, the sector selected by the
address used in the ID-CFI enter command. While the ID-CFI ASO is entered the content of all other sectors
is undefined.
The ID-CFI address map starts at location 0 of the selected sector. Locations above the maximum defined
address of the ID-CFI ASO to the maximum address of the selected sector have undefined data. The ID-CFI
enter commands use the same address and data values used on previous generation memories to access
the JEDEC Manufacturer ID (Autoselect) and Common Flash Interface (CFI) information, respectively.
For the complete address map see
The Joint Electron Device Engineering Council (JEDEC) standard JEP106T defines the manufacturer ID for a
compliant memory. Common industry usage defined a method and format for reading the manufacturer ID
and a device specific ID from a memory device. The manufacturer and device ID information is primarily
intended for programming equipment to automatically match a device with the corresponding programming
algorithm. Spansion has added additional fields within this 32-byte address space.
Sector Size (kbyte)
(SA) + 0080h to FFFFh
128
(SA) + 0000h to 000Fh
(SA) + 0010h to 0079h
D a t a
Word Address
S h e e t
Table 2.4 S29GL128S Sector and Memory Address Map
Sector Count
128
Table 2.5 ID-CFI Address Map Overview
GL-S MirrorBit
( P r e l i m i n a r y )
Table 6.2 on page
(traditional Autoselect values)
CFI data structure
®
Sector Range
Family
Description
Undefined
Device ID
SA127
SA00
57.
:
07F0000h-07FFFFFh
0000000h-000FFFFh
Address Range
(16-Bit)
:
Read / Write
Read Only
Read Only
Read Only
Sector Starting Address
Sector Ending Address
Notes
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