HY29F040A datasheet(4/40 Pages) HYNIX

Part #	HY29F040A

Description	512K x 8-bit CMOS 5.0 volt-only, Sector Erase Flash Memory

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Manufacturer	HYNIX [Hynix Semiconductor]

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HY29F040A

BUS OPERATION

Table 1. Bus Operations(1)

OPERATION

/CE

/OE

/WE

A0

A1

A6

A9

I/O

Electronic ID Manufacturer Code(2)

LL

H

L

V

ID

Code

Electronic ID Device Code(2)

LL

H

L

V

ID

Code

Read(3)

L

H

A0A1

A6A9

D

OUT

Standby

H

X

High Z

Output Disable

L

H

X

High Z

Write

L

H

L

A0

A1

A6

A9

D

IN

(4)

Enable Sector Protect

L

V

ID

LX

X

V

ID

X

Verify Sector Protect

L

H

L

H

L

V

ID

Code

Notes:

1. L = V

IL, H = VIH, X = Don’t Care. See DC Characteristics for voltage levels.

2. Manufacturer and device codes may also be accessed via a command register sequence. Refer to Table 4.

3. /WE can be V

IL if /CE is VIL, /OE at VIH initiates the write operations.

4. Refer to Table 4 for valid D

IN during a write operation.

Table 2. Sector Protection Verify Electronic ID Codes

Type

A18

A17

A16

A6

A1

A0

Code

DQ7

DQ6

DQ5

DQ4

DQ3

DQ2

DQ1

DQ0

HEX

Manufacture Code

X

V

IL

V

IL

V

IL

ADH

10

1

0

1

HY29F040A

Device Code

X

V

IL

V

IL

V

IH

A4H

10

0

1

0

Sector Protection

Sector Addresses

V

IL

V

IH

V

IL

01H(1)

00

0

1

Notes:

1. Outputs 01H at protected sector addresses, and output 00H at unprotected sector addresses.

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