11
AT49F001(N(T)
1008D–FLASH–2/03
Program Cycle Waveforms
Sector or Chip Erase Cycle Waveforms
Notes: 1. OE must be high only when WE and CE are both low.
2. 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.)
3. For chip erase, the data should be 10H, and for sector erase, the data should be 30H.
Program Cycle Characteristics
Symbol Parameter Min Typ Max Units
t
BP
Byte Programming Time 10 50 µs
t
AS
Address Set-up Time 0 ns
t
AH
Address Hold Time 50 ns
t
DS
Data Set-up Time 50 ns
t
DH
Data Hold Time 0 ns
t
WP
Write Pulse Width 90 ns
t
WPH
Write Pulse Width High 90 ns
t
EC
Erase Cycle Time 10 seconds
OE
PROGRAM CYCLE
INPUT
DATA
ADDRESS
A0
55
5555 5555
AA
2AAA
t
BP
t
WPH
t
WP
CE
WE
A0-A16
DATA
t
AS
t
AH
t
DH
t
DS
OE
(1)
AA
80
Note 3
55 55
5555
5555
Note 2
AA
BYTE 0
BYTE 1 BYTE 2
BYTE 3
BYTE 4
BYTE 5
2AAA 2AAA
t
WPH
t
WP
CE
WE
A0-A16
DATA
t
AS
t
AH
t
EC
t
DH
t
DS
5555
