at49f2048 ATMEL Corporation, at49f2048 Datasheet - Page 8

• Manufacturer Part Number: at49f2048
• Description: 2-megabit 128k X 16 5-volt Only Flash Memory
• Manufacturer: ATMEL Corporation

Program Cycle Characteristics
Program Cycle Waveforms
Sector or Chip Erase Cycle Waveforms
Notes:
8
Symbol
t
t
t
t
t
t
t
t
BP
AS
AH
DS
DH
WP
WPH
EC
1.
2.
3.
OE must be high only when WE and CE are both low.
For chip erase, the address should be 5555. For sector erase, the address depends on what sector is to be erased. (See
note 4 under command definitions.)
For chip erase, the data should be 10
Parameter
Word Programming Time
Address Set-up Time
Address Hold Time
Data Set-up Time
Data Hold Time
Write Pulse Width
Write Pulse Width High
Erase Cycle Time
A0-A16
DATA
WE
OE
CE
A0-A16
AT49F2048
(1)
DATA
WE
OE
CE
t
AS
t
AS
5555
WORD 0
AA
5555
t
t
WP
DS
t
AH
AA
2AAA
H
t
t
WORD 1
DS
WP
t
, and for sector erase, the data should be 30
AH
55
2AAA
55
5555
t
t
WPH
DH
WORD 2
80
5555
t
t
PROGRAM CYCLE
WPH
DH
A0
5555
WORD 3
ADDRESS
AA
INPUT
DATA
2AAA
WORD 4
Min
55
10
50
50
10
90
90
t
BP
Note 2
H
.
WORD 5
Note 3
5555
Max
t
AA
EC
50
10
seconds
Units
ns
ns
ns
ns
ns
ns
s