M29W640FT70N6E View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

M29W640FT70N6E

64 Mbit (8Mb x8 or 4Mb x16, Page, Boot Block) 3V Supply Flash Memory

STMicroelectronics 

M29W640FT, M29W640FB

4 Command Interface

4.3.3

Block Protect and Chip Unprotect commands

Groups of blocks can be protected against accidental Program or Erase. The Protection

Groups are shown in Appendix A: Block addresses, Table 20: Top Boot Block Addresses,

M29W640FT and Table 21: Bottom Boot Block Addresses, M29W640FB. The whole chip can

be unprotected to allow the data inside the blocks to be changed.

Block Protect and Chip Unprotect operations are described in Appendix D: Block Protection.

Table 5.

Commands, 16-bit mode, BYTE = VIH

Bus Write Operations

Command

1st

2nd

3rd

4th

5th

6th

Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data

Read/Reset

1 X F0

3 555 AA 2AA 55 X F0

Auto Select

3 555 AA 2AA 55 555 90

Program

4 555 AA 2AA 55 555 A0 PA PD

Double Word Program 3 555 50 PA0 PD0 PA1 PD1

Quadruple Word

Program

5 555 56 PA0 PD0 PA1 PD1 PA2 PD2 PA3 PD3

Unlock Bypass

3 555 AA 2AA 55 555 20

Unlock Bypass

Program

2 X A0 PA PD

Unlock Bypass Reset 2 X 90 X 00

Chip Erase

6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10

Block Erase

6+ 555 AA 2AA 55 555 80 555 AA 2AA 55 BA 30

Program/Erase

Suspend

Program/Erase

Resume

1 X B0

1 X 30

Read CFI Query

1 55 98

Enter Extended Block 3 555 AA 2AA 55 555 88

Exit Extended Block 4 555 AA 2AA 55 555 90 X 00

1. X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block. All values in the table are in

hexadecimal.

The Command Interface only uses A–1, A0-A10 and DQ0-DQ7 to verify the commands; A11-A20, DQ8-DQ14 and DQ15

are Don’t Care. DQ15A–1 is A–1 when BYTE is VIL or DQ15 when BYTE is VIH.

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