AM28F020 Advanced Micro Devices, AM28F020 Datasheet - Page 29

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

SWITCHING WAVEFORMS
Addresses
WE# (W
Data (DQ)
OE# (G#)
CE# (E#)
5.0 V
V
0 V
V
V
V
CC
PPH
PP
PPL
#
)
Power-up,
Standby
t
ELWL
t
WLWH
HIGH Z
(t
t
DVWH
CS
(t
)
WP
t
Setup Erase
AVAV
(t
Command
)
DS
)
(t
t
Figure 8.
WC
VCS
t
VPEL
)
DATA IN
t
= 20h
GHWL
t
WHWL
(t
OES
(t
Command
t
AC Waveforms for Erase Operations
WHEH
WPH
Erase
)
t
WHDX
t
)
AVWL
(t
CH
Am28F020
(t
DATA IN
)
= 20h
DH
(t
AS
)
Erasure
)
t
WHWH2
Erase-Verify
Command
DATA IN =
t
t
ELQV
ELQX
A0h
t
WLAX
t
GLQV
(t
(t
CE
LZ
t
WHGL
(t
)
)
AH
(t
t
OE
)
GHQZ
Verification
t
t
t
AVAV
EHQZ
AXQX
)
Erase
(t
(t
DF
(t
(t
RC
DF
OH
)
)
)
)
VALID
DATA
OUT
Power-down
Standby,
t
GLQX
14727F-16
(t
OLZ
)
29