2

3583AS–FLASH–9/06

AT49BV640S(T) Summary

The AT49BV640S(T) device also contains a freeze feature that will freeze the lock status of the

secure regions. The freeze feature prevents any further locking of the secure regions. If the user

requires certain regions to be locked, then these regions must be programmed and locked prior

to activation of the freeze command. It is important to note that enabling the freeze feature is

irreversible.

2.

Pin Configurations

2.1

64-ball CBGA Top View

Pin Name

Pin Function

A0 - A21

Addresses

CE

Chip Enable

OE

Output Enable

WE

Write Enable

RESET

Reset

VPP

Write Protection and Power Supply for Accelerated Program Operations

I/O0 - I/O15

Data Inputs/Outputs

NC

No Connect

VCCQ

Output Power Supply

A

B

C

D

E

F

G

H

1

2345678

A0

A1

A2

A3

I/O8

NC

NC

NC

A5

VSS

A6

A4

I/O1

I/O0

NC

NC

A7

A8

A9

A10

I/O9

I/010

I/O2

VCC

VPP

CE

A11

RESET

I/O3

I/O11

VCCQ

VSS

A12

A13

A14

NC

I/O4

I/O12

I/O5

I/O13

VCC

NC

NC

NC

NC

NC

I/O6

VSS

A17

A18

A19

A15

I/O15

NC

I/O14

I/O7

A21

NC

A20

A16

NC

OE

WE

NC