F49L400UA datasheet(5/47 Pages) ESMT

Part #	F49L400UA

Description	4 Mbit (512K x 8/256K x 16) 3V Only CMOS Flash Memory

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Manufacturer	ESMT [Elite Semiconductor Memory Technology Inc.]

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5 / 47 page

EFST

F49L400UA/F49L400BA

Elite Flash Storage Technology Inc.

Publication Date : Sep. 2006

Revision: 1.1

5/47

7. FUNCTIONAL DESCRIPTION

7.1 Device operation

This section describes the requirements and use

of the device bus operations, which are initiated

through the internal command register. The

register is composed of latches that store the

command, address and data information needed

to execute the command. The contents of the

register serve as inputs to the internal state

machine. The state machine outputs dictate the

function

of

the

device.

The

F49L400UA/F49L400BA features various bus

operations as Table 3.

Table 3. F49L400UA/F49L400BA Operation Modes Selection

ADDRESS

DESCRIPTION

CE

OE WE

RESET

A17

|

A12

A11

|

A10

A9

A8

|

A7

A6

A5

|

A2

A1 A0

DQ0~DQ7

Reset(3)

X

L, Vss±

0.3V(3)

X

High Z

Read

L

H

AIN

Dout

Write

L

H

L

H

AIN

DIN

Output Disable

L

H

X

High Z

Standby

VCC±

0.3V

X

VCC±

0.3V

X

High Z

Sector Protect(2)

L

H

L

VID

SA

X

L

X

H

L

DIN

Sector Unprotect(2)

L

H

L

VID

SA

X

H

X

H

L

DIN

Temporary sector unprotect

X

VID

AIN

DIN

Auto-select

See Table 4

Notes:

1.

L= Logic Low = VIL, H= Logic High = VIH, X= Don't Care, SA= Sector Address, VID=11.5V to 12.5V.

AIN= Address In, DIN = Data In, Dout = Data Out.

2. The sector protect and unprotect functions may also be implemented via programming equipment.

3. See “Reset Mode” section.

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