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M29W017D

Array mode, or when the device is in Autoselected

mode.

One Bus Write cycle is required to issue the Read

CFI Query Command. Once the command is is-

sued subsequent Bus Read operations read from

the Common Flash Interface Memory Area.

The Read/Reset command must be issued to re-

turn the device to the previous mode (the Read Ar-

ray mode or Autoselected mode). A second Read/

Reset command would be needed if the device is

to be put in the Read Array mode from Autoselect-

ed mode.

See Appendix B, Tables 17, 18, 19, 20, 21 and 22

for details on the information contained in the

Common Flash Interface (CFI) memory area.

Block Protect and Chip Unprotect Commands.

Each block can be separately protected against

accidental Program or Erase. 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 C.

Table 3. Commands

Note: x Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block. All values in the table are in hexadecimal.

Command

Bus Write Operations

1st

2nd

3rd

4th

5th

6th

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read/Reset

1x

F0

3

x

AA

x

55

x

F0

Auto Select

3

x

AA

x

55

x

90

Program

4

x

AA

x

55

x

A0

PA

PD

Unlock Bypass

3

x

AA

x

55

x

20

Unlock Bypass

Program

2x

A0

PA

PD

Unlock Bypass Reset

2

x

90

x

00

Chip Erase

6

x

AA

x

55

x

80

x

AA

x

55

x

10

Block Erase

6+

x

AA

x

55

x

80

x

AA

x

55

BA

30

Erase Suspend

1

x

B0

Erase Resume

1

x

30

Read CFI Query

1

55

98