S29GL01GS datasheet(16/104 Pages) SPANSION

16 / 104 page

GL-S MirrorBit® Family

S29GL_128S_01GS_00_06 March 16, 2012

Da ta

Sh e e t

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.

Note that in future technology nodes the Data Polling Status feature will not be supported. The user is

strongly advised to use the Status Register to determine device status.

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

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