S29GL01GS datasheet(21/118 Pages) INFINEON

21 / 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

5.1

Embedded algorithm controller (EAC)

The EAC takes commands from the host system for programming and erasing the flash memory array and

performs all the complex operations needed to change the non-volatile memory state. This frees the host system

from any need to manage the program and erase processes.

There are four EAC operation categories:

• Standby (Read mode)

• Address space switching

• Embedded algorithms (EA)

• Advanced sector protection (ASP) management

5.1.1

EAC standby

In the standby mode current consumption is greatly reduced. The EAC enters its standby mode when no

command is being processed and no embedded algorithm is in progress. If the device is deselected (CE# = HIGH)

during an embedded algorithm, the device still draws active current until the operation is completed (ICC3). ICC4

in “DC characteristics” on page 78 represents the standby current specification when both the Host Interface

and EAC are in their standby state.

5.1.2

Address space switching

Writing specific address and data sequences (command sequences) switch the memory device address space

from the main flash array to one of the address space overlays (ASO).

Embedded algorithms operate on the information visible in the currently active (entered) ASO. The system

continues to have access to the ASO until the system issues an ASO exit command, performs a hardware RESET,

or until power is removed from the device. An ASO exit command switches from an ASO back to the main flash

array address space. The commands accepted when a particular ASO is entered are listed between the ASO enter

and exit commands in the command definitions table. See “Command summary” on page 58 for address and

data requirements for all command sequences.

5.1.3

Embedded algorithms (EA)

Changing the non-volatile data in the memory array requires a complex sequence of operations that are called

embedded algorithms (EA). The algorithms are managed entirely by the device internal embedded algorithm

controller (EAC). The main algorithms perform programming and erasing of the main array data and the ASO’s.

The host system writes command codes to the flash device address space. The EAC receives the commands,

performs all the necessary steps to complete the command, and provides status information during the progress

of an EA.

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