AM28F020 Advanced Micro Devices, AM28F020 Datasheet - Page 28

• Manufacturer Part Number: AM28F020
• Description: 2 Megabit (256 K x 8-Bit) CMOS 12.0 Volt/ Bulk Erase Flash Memory
• Manufacturer: Advanced Micro Devices

KEY TO SWITCHING WAVEFORMS
SWITCHING WAVEFORMS
28
Addresses
WE# (W#)
Data (DQ)
OE# (G#)
CE# (E#)
5.0 V
V
0 V
CC
WAVEFORM
t
VCS
Power-up, Standby
High Z
Don’t Care, Any Change Permitted
Address Selection
Figure 7. AC Waveforms for Read Operations
t
WHGL
Device and
Does Not Apply
t
t
Addresses Stable
ELQX
AVQV
INPUTS
t
ELQV
(t
(t
LZ
ACC
t
(t
)
GLQV
CE
)
)
Am28F020
(t
Enabled
Outputs
OE
t
t
AVAV
GLQX
)
(t
(t
RC
Changing from H to L
Changing from L to H
OLZ
)
Data
Valid
)
Steady
Output Valid
Center Line is High Impedance State (High Z)
t
AXQX
Changing, State Unknown
(t
OH
)
OUTPUTS
Standby, Power-Down
t
t
(t
GHQZ
(t
EHQZ
DF
DF
)
)
High Z
14727F-14