This Data Sheet may be revised by subsequent versions

©2003 Eon Silicon Solution, Inc., www.essi.com.tw

or modifications due to changes in technical specifications.

5

EN29F040A

Rev. B, Issue Date: 2004/04/01

TABLE 3. OPERATING MODES

4M FLASH USER MODE TABLE

USER MODE

CE

WE

OE

A9

A8

A6

A5

A1

A0

Ax/y

DQ(0-7)

STANDBY

H

X

X

X

X

X

X

X

X

X

HI-Z

READ

L

H

L

A9

A8

A6

A5

A1

A0

Ax/y

DQ (0-7)

OUTPUT DISABLE

L

H

H

X

X

X

X

X

X

X

HI-Z

READ

MANUFACTURE ID

L

H

L

VID

L/H

L

X

L

L

X

MANUFACTURE

ID

READ DEVICE ID

L

H

L

VID

L/H

L

X

L

H

X

DEVICE ID (T/B)

VERIFY SECTOR

PROTECTION

L

H

L

VID

X

L

X

H

L

X

CODE

SECTOR

PROTECTION

L

Pulse

L

VID

VID

X

L

X

X

X

X

X

VERIFY SECTOR

UNPROTECTION

L

H

L

VID

X

H

X

H

L

X

CODE

SECTOR

UNPROTECTION

Pulse

L

VID

VID

L

X

X

H

X

X

X

X

WRITE

L

L

H

A9

A8

A6

A5

A1

A0

Ax/y

DIN (0-7)

NOTES:

1)

2)

3)

Ax/y: Ax = Addr(x), Ay = Addr(y)

TABLE 4. DEVICE IDENTIFICTION

4M FLASH MANUFACTURER/DEVICE ID TABLE

A8

A6

A1

A0

DQ(7-0)

HEX

READ

MANUFACTURER ID

H

(1)

L

L

L

MANUFACTURER ID

1C

READ

DEVICE ID

H

(2)

L

L

H

DEVICE ID

04

NOTES:

1)

If a Manufacturing ID is read with A8 = L, the chip will output a configuration code 7Fh. A further

Manufacturing ID must be read with A8 = H.

2)

If a Device ID is read with A8 = L, the chip will output a configuration code 7Fh. A further Device ID

must be read with A8 = H.