AT49F040B ATMEL [ATMEL Corporation], AT49F040B Datasheet - Page 14

• Manufacturer Part Number: AT49F040B
• Description: 4-megabit (512K x 8) 5-volt Only Flash Memory
• Manufacturer: ATMEL [ATMEL Corporation]

21. Data Polling Characteristics
Notes:
22. Data Polling Waveforms
23. Toggle Bit Characteristics
Notes:
24. Toggle Bit Waveforms
Notes:
14
Symbol
t
t
t
t
t
Symbol
t
t
t
t
t
DH
OEH
OE
OEHP
WR
DH
OEH
OE
OEHP
WR
1. These parameters are characterized and not 100% tested.
2. See t
1. These parameters are characterized and not 100% tested.
2. See t
1. Toggling either OE or CE or both OE and CE will operate toggle bit.
2. Beginning and ending state of I/O6 will vary.
3. Any address location may be used but the address should not vary.
AT49F040B
The t
Parameter
Data Hold Time
OE Hold Time
OE to Output Delay
OE High Pulse
Write Recovery Time
Parameter
Data Hold Time
OE Hold Time
OE to Output Delay
OE High Pulse
Write Recovery Time
OEHP
OE
OE
spec in AC Read Characteristics.
spec in AC Read Characteristics.
specification must be met by the toggling input(s).
I/O6
WE
CE
OE
WE
CE
OE
I/O7
A0-A18
t
DH
(2)
(2)
(1)(2)(3)
t
OEH
t
DH
t
OEH
t
OE
t
OE
An
HIGH Z
An
HIGH Z
t
OEHP
t
OEHP
An
Min
Min
10
10
50
10
10
50
0
0
An
An
t
WR
Typ
Typ
t
WR
Max
Max
3606A–FLASH–12/05
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns