S29GL032A datasheet(45/95 Pages) SPANSION

45 / 95 page

September 10, 2007 S29GL-A_00_A11

S29GL-A

Data

She e t

7.10

Temporary Sector Group Unprotect

This feature allows temporary unprotection of previously protected sector groups to change data in-system.

The Sector Group Unprotect mode is activated by setting the RESET# pin to VID. During this mode, formerly

protected sector groups can be programmed or erased by selecting the sector group addresses. Once VID is

removed from the RESET# pin, all the previously protected sector groups are protected again. Figure 7.1

shows the algorithm, and Figure 16.11 on page 82 shows the timing diagrams, for this feature.

Figure 7.1 Temporary Sector Group Unprotect Operation

Notes

1. All protected sector groups unprotected (If WP# = VIL, the highest or lowest address sector remains protected for uniform sector devices;

the top or bottom two address sectors remains protected for boot sector devices).

2. All previously protected sector groups are protected once again.

Table 7.22 S29GL064A (Models R6, R7) Sector Group Protection/Unprotection Addresses

Sector

A21–A15

Sector/

Sector

Block Size

(Kbytes)

Sector

A21–A15

Sector/

Sector

Block Size

(Kbytes)

Sector

A21–A15

Sector/

Sector

Block Size

(Kbytes)

SA0–SA3

00000

256 (4x64)

SA44–SA47

01011

256 (4x64)

SA88–SA91

10110

256 (4x64)

SA4–SA7

00001

256 (4x64)

SA48–SA51

01100

256 (4x64)

SA92–SA95

10111

256 (4x64)

SA8–SA11

00010

256 (4x64)

SA52–SA55

01101

256 (4x64)

SA96–SA99

11000

256 (4x64)

SA12–SA15

00011

256 (4x64)

SA56–SA59

01110

256 (4x64)

SA100–SA103

11001

256 (4x64)

SA16–SA19

00100

256 (4x64)

SA60–SA63

01111

256 (4x64)

SA104–SA107

11010

256 (4x64)

SA20–SA23

00101

256 (4x64)

SA64–SA67

10000

256 (4x64)

SA108–SA111

11011

256 (4x64)

SA24–SA27

00110

256 (4x64)

SA68–SA71

10001

256 (4x64)

SA112–SA115

11100

256 (4x64)

SA28–SA31

00111

256 (4x64)

SA72–SA75

10010

256 (4x64)

SA116–SA119

11101

256 (4x64)

SA32–SA35

01000

256 (4x64)

SA76–SA79

10011

256 (4x64)

SA120–SA123

11110

256 (4x64)

SA36–SA39

01001

256 (4x64)

SA80–SA83

10100

256 (4x64)

SA124–SA127

11111

256 (4x64)

SA40–SA43

01010

256 (4x64)

SA84–SA87

10101

256 (4x64)

START

Perform Erase or

Program Operations

RESET# = VIH

Temporary Sector

Group Unprotect Completed

(Note 2)

RESET# = VID

(Note 1)

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