am42bds6408h Meet Spansion Inc., am42bds6408h Datasheet - Page 18

am42bds6408h

Manufacturer Part Number

am42bds6408h

Description

Cmos 1.8 Volt-only Simultaneous Read/write, Burst Mode Flash Memory, And 8 Mbit 512 K X 16-bit Sram

Manufacturer

Meet Spansion Inc.

Datasheet

1.AM42BDS6408H.pdf (90 pages)

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SA103–SA106

SA107–SA110

SA111–SA114

SA115–SA118

SA119–SA122

SA123–SA126

SA127–SA130

Table 3. Am42BDS6408H Boot Sector/Sector

SA99–SA102

Block Addresses for Protection/Unprotection

SA11–SA14

SA15–SA18

SA19–SA22

SA51–SA54

SA55–SA58

SA59–SA62

SA63–SA66

SA67–SA70

SA71–SA74

SA75–SA78

SA79–SA82

SA83–SA86

SA87–SA90

SA91–SA94

SA95–SA98

SA23-SA26

SA27-SA30

SA31-SA34

SA35-SA38

SA39-SA42

SA43-SA46

SA47-SA50

Sector

SA131

SA132

SA133

SA134

SA10

SA0

SA1

SA2

SA3

SA4

SA5

SA6

SA7

SA8

SA9

00001XXXXX

00010XXXXX

00011XXXXX

00100XXXXX

00101XXXXX

00110XXXXX

00111XXXXX

01000XXXXX

01001XXXXX

01010XXXXX

01011XXXXX

01100XXXXX

01101XXXXX

01110XXXXX

01111XXXXX

10000XXXXX

10001XXXXX

10010XXXXX

10011XXXXX

10100XXXXX

10101XXXXX

10110XXXXX

10111XXXXX

11000XXXXX

11001XXXXX

11010XXXXX

11011XXXXX

11100XXXXX

11101XXXXX

11110XXXXX

0000001XXX

0000010XXX

0000011XXX

1111100XXX

1111101XXX

1111110XXX

0000000000

0000000001

0000000010

0000000011

0000000100

0000000101

0000000110

0000000111

1111111000

A21–A12

A D V A N C E

Sector Block Size

128 (4x32) Kwords

32 Kwords

4 Kwords

Sector/

Am42BDS6408H

I N F O R M A T I O N

Sector/Sector Block Protection and Un-

protection

The hardware sector protection feature disables both

programming and erase operations in any sector. The

hardware sector unprotection feature re-enables both

program and erase operations in previously protected

sectors. Sector protection/unprotection can be imple-

mented via two methods.

(Note: For the following discussion, the term “sector”

applies to both sectors and sector blocks. A sector

block consists of two or more adjacent sectors that are

protected or unprotected at the same time (see

“ A m 4 2 B D S 6 4 0 8 H B o o t S e c t o r / S e c t o r B l o ck

Addresses for Protection/Unprotection,” on page 16

Sector Protection

The Am42BDS6408H features several levels of sector

protection, which can disable both the program and

erase operations in certain sectors or sector groups:

Persistent Sector Protection

A command sector protection method that replaces

the old 12 V controlled protection method.

Password Sector Protection

A highly sophisticated protection method that requires

a password before changes to certain sectors or sec-

tor groups are permitted

WP# Hardware Protection

A write protect pin that can prevent program or erase

operations in the outermost sectors.

The WP# Hardware Protection feature is always avail-

able, independent of the software managed protection

method chosen.

Selecting a Sector Protection Mode

All parts default to operate in the Persistent Sector

Protection mode. The customer must then choose if

the Persistent or Password Protection method is most

desirable. There are two one-time programmable

non-volatile bits that define which sector protection

method will be used. If the customer decides to con-

tinue using the Persistent Sector Protection method,

they must set the Persistent Sector Protection Mode

Locking Bit. This will permanently set the part to op-

Sector

SA135

SA136

SA137

SA138

SA139

SA140

SA141

1111111001

1111111010

1111111011

1111111100

1111111101

1111111110

1111111111

A21–A12

Sector Block Size

October 23, 2003

4 Kwords

Sector/

Table 3,

am42bds6408h Meet Spansion Inc., am42bds6408h Datasheet - Page 18

am42bds6408h

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