S29GL01GS datasheet(11/106 Pages) SPANSION

11 / 106 page

October 9, 2013 S29GL_128S_01GS_00_08

GL-S MirrorBit® Family

Data

She e t

The device control logic is subdivided into two parallel operating sections, the Host Interface Controller (HIC)

and the Embedded Algorithm Controller (EAC). HIC monitors signal levels on the device inputs and drives

outputs as needed to complete read and write data transfers with the host system. HIC delivers data from the

currently entered address map on read transfers; places write transfer address and data information into the

EAC command memory; notifies the EAC of power transition, hardware reset, and write transfers. The EAC

looks in the command memory, after a write transfer, for legal command sequences and performs the related

Embedded Algorithms.

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 EAC. The

main algorithms perform programming and erase of the main array data. 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.

The erased state of each memory bit is a logic 1. Programming changes a logic 1 (High) to a logic 0 (Low).

Only an Erase operation is able to change a 0 to a 1. An erase operation must be performed on an entire

128-kbyte aligned and length group of data call a Sector. When shipped from Spansion all Sectors are

erased.

Programming is done via a 512-byte Write Buffer. It is possible to write from 1 to 256 words, anywhere within

the Write Buffer before starting a programming operation. Within the flash memory array, each 512-byte

aligned group of 512 bytes is called a Line. A programming operation transfers volatile data from the Write

Buffer to a non-volatile memory array Line. The operation is called Write Buffer Programming.

The Write Buffer is filled with 1’s after reset or the completion of any operation using the Write Buffer. Any

locations not written to a 0 by a Write to Buffer command are by default still filled with 1’s. Any 1’s in the Write

Buffer do not affect data in the memory array during a programming operation.

As each Page of data that was loaded into the Write Buffer is transferred to a memory array Line.

Sectors may be individually protected from program and erase operations by the Advanced Sector Protection

(ASP) feature set. ASP provides several, hardware and software controlled, volatile and non-volatile,

methods to select which sectors are protected from program and erase operations.

Table 1.1 S29GL-S Address Map

Type

Count

Addresses

Address within Page

A3 - A0

Address within Write Buffer

256

A7 - A0

Page

4096

A15 - A4

Write-Buffer-Line

256

A15 - A8

Sector

1024 (1 Gb)

512 (512 Mb)

256 (256 Mb)

128 (128 Mb)

AMAX - A16

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