7

MX29F004T/B

P/N:PM0554

REV. 1.9, OCT. 19, 2004

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

45H/46H

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

Chip 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 Chip Protect

L

L

H

X

H

X

V

Code (5)

with 12V system

Chip 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 Chip 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. MX29F004T/B 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.

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

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

command.

7. The "verify chip protect/unprotect without 12V system" is only following "Chip protect/unprotect without 12V

system" command.