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F49L040A-90T Datasheet(PDF) 5 Page - Elite Semiconductor Memory Technology Inc.

Part # F49L040A-90T
Description  4 Mbit (512K x 8) 3V Only CMOS Flash Memory
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Manufacturer  ESMT [Elite Semiconductor Memory Technology Inc.]
Direct Link  http://www.esmt.com.tw/index.asp
Logo ESMT - Elite Semiconductor Memory Technology Inc.

F49L040A-90T Datasheet(HTML) 5 Page - Elite Semiconductor Memory Technology Inc.

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EFST
F49L040A
Elite Flash Storage Technology Inc.
Publication Date : Apr. 2005
Revision: 1.0
5/41
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 F49L040A features
various bus operations as Table 2.
Table 2. F49L040A Operation Modes Selection
ADDRESS
DESCRIPTION
CE
OE
WE
A18
|
A13
A12
|
A10
A9
A8
|
A7
A6
A5
|
A2
A1 A0
DQ0~DQ7
Read
L
L
H
AIN
Dout
Write
L
H
L
AIN
DIN
Output Disable
L
H
H
X
High Z
Standby
H
X
X
X
High Z
Sector Protect(2)
L
H
L
SA
X
VID
X
L
X
H
L
DIN
Sector Unprotect(2)
L
H
L
SA
X
VID
X
H
X
H
L
DIN
Auto-select
See Table 3
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.
Table 3. F49L040A Auto-Select Mode (High Voltage Method)
ADDRESS
DQ0~DQ7
DESCRIPTION
CE
OE
WE
A18
|
A13
A12
|
A10
A9
A8
|
A4
A6
A3
A2
A1
A0
L
L
H
X
X
VID
X
X
L
H
L
L
7FH
L
L
H
X
X
VID
X
X
H
L
L
L
7FH
L
L
H
X
X
VID
X
X
H
H
L
L
7FH
(Manufacturer ID:EFST)
L
L
H
X
X
VID
X
X
L
L
L
L
8CH
(Device ID: F49L040A)
L
L
H
X
X
VID
XXXX
L
H
4FH
Sector Protection Verify
L
L
H
SA
X
VID
X
L
X
X
H
L
Code(2)
Notes :
1.Manufacturer and device codes may also be accessed via the software command sequence in Table 4.
2. Code=00H means unprotected.
Code =01H means protected.


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