S29GL01GS datasheet(9/108 Pages) CYPRESS

9 / 108 page

Document Number: 001-98285 Rev. *R

Page 9 of 108

S29GL01GS/S29GL512S

S29GL256S/S29GL128S

2.3

Device ID and Common Flash Interface (ID-CFI) ASO Map — Automotive Only

Fab Lot # + Wafer # + Die X Coordinate + Die Y Coordinate gives a unique ID for each device.

2.3.1

Device ID

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. Cypress has added additional fields within this 32-byte address space.

The original industry format was structured to work with any memory data bus width e. g. ×8, ×16, ×32. The ID code values are

traditionally byte wide but are located at bus width address boundaries such that incrementing the device address inputs will read

successive byte, word, or double word locations with the ID codes always located in the least significant byte location of the data

bus. Because the device data bus is word wide each code byte is located in the lower half of each word location. The original

industry format made the high order byte always 0. Cypress has modified the format to use both bytes in some words of the address

space. For the detail description of the Device ID address map see Table 7.2 on page 58.

2.3.2

Common Flash Memory Interface

The JEDEC Common Flash Interface (CFI) specification (JESD68.01) defines a standardized data structure that may be read from a

flash memory device, which allows vendor-specified software algorithms to be used for entire families of devices. The data structure

contains information for system configuration such as various electrical and timing parameters, and special functions supported by

the device. Software support can then be device-independent, Device ID-independent, and forward-and-backward-compatible for

entire Flash device families.

The system can read CFI information at the addresses within the selected sector as shown in Device ID and Common Flash

Interface (ID-CFI) ASO Map on page 58.

Like the Device ID information, CFI information is structured to work with any memory data bus width e. g. ×8, ×16, ×32. The code

values are always byte wide but are located at data bus width address boundaries such that incrementing the device address reads

successive byte, word, or double word locations with the codes always located in the least significant byte location of the data bus.

Because the data bus is word wide each code byte is located in the lower half of each word location and the high order byte is

always 0.

For further information, please refer to the Cypress CFI Specification, Version 1.4 (or later), and the JEDEC publications JEP137-A

and JESD68.01

. Please contact JEDEC (http://www.jedec.org) for their standards and the Cypress CFI Specification may be found

at the Cypress Website (http://www.cypress.com/cypressappnotes) at the time of this document’s publication), or contact the local

Cypress sales office listed in the website.

Word Address

Data Field

# of bytes

Data Format

Example of

Actual Data

Hex Read Out of Example

Data

(SA) + 0080h

Size of Electronic

Marking

Hex

0013h

(SA) + 0081h

Revision of Electronic

Marking

Hex

0001h

(SA) + 0082h

Fab Lot #

Ascii

LD87270

004Ch, 0044h, 0038h, 0037h,

0032h, 0037h, 0030h

(SA) + 0089h

Wafer #

Hex

0017h

(SA) + 008Ah

Die X Coordinate

Hex

000Ah

(SA) + 008Bh

Die Y Coordinate

Hex

000Fh

(SA) + 008Ch

Class Lot #

Ascii

BR33150

0042h, 0052h, 0033h, 0033h,

0031h, 0035h, 0030h

(SA) + 0093h

Reserved for Future

n/a

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