Specifications

16 GL-S MirrorBit
®
Family IS29GL_128S_01GS_00_Rev.A February 2015
Data Sheet
2.4 Data Polling Status ASO
The Data Polling Status ASO contains a single word of volatile memory indicating the progress of an EA. The
Data Polling Status ASO is entered immediately following the last write cycle of any command sequence that
initiates an EA. Commands that initiate an EA are:
 Word Program
 Program Buffer to Flash
 Chip Erase
 Sector Erase
 Erase Resume / Program Resume
 Program Resume Enhanced Method
 Blank Check
 Lock Register Program
 Password Program
 PPB Program
 All PPB Erase
The Data Polling Status word appears at all word locations in the device address space. When an EA is
completed the Data Polling Status ASO is exited and the device address space returns to the address map
mode where the EA was started.
2.5 Secure Silicon Region ASO
The Secure Silicon Region (SSR) provides an extra flash memory area that can be programmed once and
permanently protected from further changes i. e. it is a One Time Program (OTP) area. The SSR is
1024 bytes in length. It consists of 512 bytes for Factory Locked Secure Silicon Region and 512 bytes for
Customer Locked Secure Silicon Region.
The sector address supplied during the Secure Silicon Entry command selects the Flash Memory Array
sector that is overlaid by the Secure Silicon Region address map. The SSR is overlaid starting at location 0 in
the selected sector. Use of the sector 0 address is recommended for future compatibility. While the SSR ASO
is entered the content of all other sectors is undefined. Locations above the maximum defined address of the
SSR ASO to the maximum address of the selected sector have undefined data.
Table 2.6 Secure Silicon Region
Word Address Range Content Size
(SA) + 0000h to 00FFh Factory Locked Secure Silicon Region 512 bytes
(SA) + 0100h to 01FFh Customer Locked Secure Silicon Region 512 bytes
(SA) + 0200h to FFFFh Undefined 127 kbytes