Document Number: 001-98285 Rev. *R
Page 58 of 108
S29GL01GS/S29GL512S
S29GL256S/S29GL128S
7.2
Device ID and Common Flash Interface (ID-CFI) ASO Map
The Device ID portion of the ASO (word locations 0h to 0Fh) provides manufacturer ID, device ID, Sector Protection State, and basic
feature set information for the device.
ID-CFI Location 02h displays sector protection status for the sector selected by the sector address (SA) used in the ID-CFI enter
command. To read the protection status of more than one sector it is necessary to exit the ID ASO and enter the ID ASO using the
new SA. The access time to read location 02h is always t
ACC
and a read of this location requires CE# to go High before the read and
return Low to initiate the read (asynchronous read access). Page mode read between location 02h and other ID locations is not
supported. Page mode read between ID locations other than 02h is supported.
For additional information see
Table 7.2
ID (Autoselect) Address Map
Description
Address
Read Data
Manufacture ID
(SA) + 0000h
0001h
Device ID
(SA) + 0001h
227Eh
Protection
Verification
(SA) + 0002h
Sector Protection State (1= Sector protected, 0 = Sector unprotected). This protection
state is shown only for the SA selected when entering ID-CFI ASO. Reading other SA
provides undefined data. To read a different SA protection state ASO exit command
must be used and then enter ID-CFI ASO again with the new SA.
Indicator Bits
(SA) + 0003h
DQ15-DQ08 = 1 (Reserved)
DQ7 - Factory Locked Secure Silicon Region
1 = Locked,
0 = Not Locked
DQ6 - Customer Locked Secure Silicon Region
1 = Locked
0 = Not Locked
DQ5 = 1 (Reserved)
DQ4 - WP# Protects
0 = lowest address Sector
1 = highest address Sector
DQ3 - DQ0 = 1 (Reserved)
RFU
(SA) + 0004h
Reserved
(SA) + 0005h
Reserved
(SA) + 0006h
Reserved
(SA) + 0007h
Reserved
(SA) + 0008h
Reserved
(SA) + 0009h
Reserved
(SA) + 000Ah
Reserved
(SA) + 000Bh
Reserved
