AT49BV040B Datasheet, PDF (14/21 Pages) ATMEL Corporation – 4-megabit (512K x 8) Flash Memory

21. Data Polling Characteristics
Symbol Parameter
t_DH
t_OEH
t_OE
t_OEHP
t_WR
Notes:
Data Hold Time
OE Hold Time
OE to Output Delay⁽²⁾
OE High Pulse
Write Recovery Time
1. These parameters are characterized and not 100% tested.
2. See t_OE spec in AC Read Characteristics.
22. Data Polling Waveforms
WE
CE
OE
t_DH
I/O7
t_OEH
t_OE
HIGH Z
t_OEHP
A0-A18
An
An
An
23. Toggle Bit Characteristics
Symbol Parameter
t_DH
t_OEH
t_OE
t_OEHP
t_WR
Notes:
Data Hold Time
OE Hold Time
OE to Output Delay⁽²⁾
OE High Pulse
Write Recovery Time
1. These parameters are characterized and not 100% tested.
2. See t_OE spec in AC Read Characteristics.
24. Toggle Bit Waveforms^(1)(2)(3)
WE
CE
OE
I/O6
t_OEH
t_DH ^tOE
t_OEHP
HIGH Z
Notes:
1. Toggling either OE or CE or both OE and CE will operate toggle bit.
The t_OEHP specification must be met by the toggling input(s).
2. Beginning and ending state of I/O6 will vary.
3. Any address location may be used but the address should not vary.
14 AT49BV040B
Min
10
10
50
0
An
Min
10
10
50
0
Typ
t_WR
An
Typ
t_WR
Max
Units
ns
ns
ns
ns
ns
Max
Units
ns
ns
ns
ns
ns
3499B–FLASH–4/06