6

P/N:PM0538

REV. 2.3, DEC. 10, 2004

MX29F040

Mode

Pins

CE

OE

WE

A0

A1

A6

A9

Q0 ~ Q7

Read Silicon ID

L

L

H

L

L

X

V

C2H

Manufacturer Code(1)

Read Silicon ID

L

L

H

H

L

X

V

A4H

Device Code(1)

Read

L

L

H

A0

A1

A6

A9

D

OUT

Standby

H

X

X

X

X

X

X

HIGH Z

Output Disable

L

H

H

X

X

X

X

HIGH Z

Write

L

H

L

A0

A1

A6

A9

D

Sector Protect with 12V

L

V

L

X

X

L

V

X

system(6)

Chip Unprotect with 12V

L

V

L

X

X

H

V

X

system(6)

Verify Sector Protect

L

L

H

X

H

X

V

Code(5)

with 12V system

Sector Protect without 12V

L

H

L

X

X

L

H

X

system (6)

Chip Unprotect without 12V

L

H

L

X

X

H

H

X

system (6)

Verify Sector Protect/Unprotect

L

L

H

X

H

X

H

Code(5)

without 12V system (7)

Reset

X

X

X

X

X

X

X

HIGH Z

TABLE 2. MX29F040 BUS OPERATION

NOTES:

1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 1.

2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V.

3. Refer to Table 1 for valid Data-In during a write operation.

4. X can be VIL or VIH.

5. Code=00H means unprotected.

Code=01H means protected.

A18~A16=Sector address for sector protect.

6. Refer to sector protect/unprotect algorithm and waveform.

Must issue "unlock for sector protect/unprotect" command before "sector protect/unprotect without 12V system" command.

7. The "verify sector protect/unprotect without 12V system" is only following "Sector protect/unprotect without 12V system"

command.