AT49F002(N)T
Program Cycle Characteristics
Symbol
t
BP
t
AS
t
AH
t
DS
t
DH
t
WP
t
WPH
t
EC
Parameter
Byte 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
0
50
50
0
90
90
10
Min
Typ
10
Max
50
Units
µs
ns
ns
ns
ns
ns
ns
seconds
Program Cycle Waveforms
Sector or Chip Erase Cycle Waveforms
OE
(1)
CE
t
WP
WE
t
WPH
t
AS
AO - A17
t
AH
5555
t
DH
2AAA
5555
5555
2AAA
Note 2
t
DS
DATA
AA
55
80
AA
55
Note 3
t
EC
BYTE 0
BYTE 1
BYTE 2
BYTE 3
BYTE 4
BYTE 5
Notes:
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 10H, and for sector erase, the data should be 30H.
9
ATMEL [ ATMEL CORPORATION ]
