at49bv040a ATMEL Corporation, at49bv040a Datasheet - Page 12

• Manufacturer Part Number: at49bv040a
• Description: At49bv040a 4-megabit 512k X 8 Single 2.7-volt Battery-voltage Flash Memory
• Manufacturer: ATMEL Corporation

20. Data Polling Characteristics
Notes:
21. Data Polling Waveforms
22. Toggle Bit Characteristics
Notes:
23. Toggle Bit Waveforms
Notes:
12
Symbol
t
t
t
t
Symbol
t
t
t
t
t
DH
OEH
OE
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.
AT49BV040A
The t
Parameter
Data Hold Time
OE Hold Time
OE to Output Delay
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
spec in
specification must be met by the toggling input(s).
I/O6
WE
CE
OE
“AC Read Characteristics” on page
“AC Read Characteristics” on page
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
8.
8.
An
HIGH Z
t
OEHP
An
Min
Min
10
10
10
10
50
0
0
An
An
t
WR
Typ
Typ
t
WR
Max
Max
3358C–FLASH–3/05
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns