M28W640FCT_06 datasheet(3/77 Pages) STMICROELECTRONICS

Part #	M28W640FCT

Description	64 Mbit (4Mbx16, Boot Block) 3V Supply Flash memory

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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3 / 77 page

M28W640FCT, M28W640FCB

Contents

3/77

4.9

Clear Status Register command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.10

Program/Erase Suspend command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.11

Program/Erase Resume command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.12

Protection Register Program command . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.13

Block Lock command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.14

Block Unlock command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.15

Block Lock-Down command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5

Block locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.1

Reading a Block’s Lock status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.2

Locked state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.3

Unlocked state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.4

Lock-Down state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.5

Locking Operations during Erase Suspend . . . . . . . . . . . . . . . . . . . . . . . 28

6

Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.1

Program/Erase Controller status (bit 7) . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.2

Erase Suspend status (bit 6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.3

Erase status (bit 5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.4

Program status (bit 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.5

VPP status (bit 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.6

Program Suspend status (bit 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

6.7

Block Protection status (bit 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

6.8

Reserved (bit 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

7

Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

8

DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

9

Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

10

Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Appendix A

Block address tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Appendix B

Common Flash Interface (CFI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

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