S29GL01GS10DFIV13 datasheet(10/108 Pages) CYPRESS

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Document Number: 001-98285 Rev. *R

Page 10 of 108

S29GL01GS/S29GL512S

S29GL256S/S29GL128S

2.4

Status Register ASO

The Status Register ASO contains a single word of registered volatile status for Embedded Algorithms. When the Status Register

read command is issued, the current status is captured (by the rising edge of WE#) into the register and the ASO is entered. The

Status Register content appears on all word locations. The first read access exits the Status Register ASO (with the rising edge of

CE# or OE#) and returns to the address space map in use when the Status Register read command was issued. Write commands

will not exit the Status Register ASO state.

2.5

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

Engineering Note: The reset and write buffer abort reset commands require very short time to execute so data polling is not

supported for these commands.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.

2.6

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. See Figure 11.16 on page 87 for ASO Entry timing requirements. 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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