S29GL01GS datasheet(33/118 Pages) INFINEON

33 / 118 page

Datasheet

001-98285 Rev. *T

2023-07-17

128 Mb/256 Mb/512 Mb/1 Gb GL-S MIRRORBIT™ Flash

Parallel, 3.0 V

Embedded operations

5.4.6

ASO Entry and Exit

5.4.6.1

ID-CFI ASO

The system can access the ID-CFI ASO by issuing the ID-CFI Entry command sequence during Read Mode. This

entry command uses the Sector Address (SA) in the command to determine which sector will be overlaid and

which sector’s protection state is reported in word location 2h. See the detail description Table 42.

The ID-CFI ASO allows the following activities:

• Read ID-CFI ASO, using the same SA as used in the entry command.

• Read Sector Protection State at Sector Address (SA) + 2h. Location 2h provides volatile information on the

current state of sector protection for the sector addressed. Bit 0 of the word at location 2h shows the logical

NAND of the PPB and DYB bits related to the addressed sector such that if the sector is protected by either the

PPB = 0 or the DYB = 0 bit for that sector the state shown is protected. (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.

•ASO Exit.

The following is a C source code example of using the CFI Entry and Exit functions.

/* Example: CFI Entry command */

*( (UINT16 *)base_addr + 0x55 ) = 0x0098; /* write CFI entry command */

/* Example: CFI Exit command */

*( (UINT16 *)base_addr + 0x000 ) = 0x00F0; /* write cfi exit command */

5.4.6.2

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

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.

5.4.6.3

Secure Silicon Region ASO

The system can access the Secure Silicon Region by issuing the Secure Silicon Region Entry command sequence

during Read Mode. This entry command uses the Sector Address (SA) in the command to determine which sector

will be overlaid.

The Secure Silicon Region ASO allows the following activities:

• Read Secure Silicon Regions.

• Programming the customer Secure Silicon Region is allowed using the Word or Write Buffer Programming

commands.

• ASO Exit using legacy Secure Silicon Exit command for backward software compatibility.

• ASO Exit using the common exit command for all ASO - alternative for a consistent exit method.

S29GL01GS Datasheet(PDF) 33 Page - Infineon Technologies AG

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