AM28F020 Advanced Micro Devices, AM28F020 Datasheet - Page 30

• 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
30
Addresses
WE
Data (DQ)
OE
CE
#
#
#
5.0 V
V
0 V
V
V
V
(W#)
(G
(E
CC
PPH
PP
PPL
#
#
)
)
Power-up,
Standby
t
ELWL
t
WLWH
HIGH Z
(t
t
DVWH
CS
(t
)
Setup Program
WP
t
Command
AVAV
t
(t
AVWL
)
DS
)
(t
t
VCS
t
WC
(t
VPEL
AS
Figure 9. AC Waveforms for Programming
)
DATA IN
)
t
= 40h
GHWL
t
WHWL
Latch Address
(t
Command
OES
and Data
Program
(t
t
WHEH
WPH
)
t
WHDX
)
(t
CH
Am28F020
(t
DATA IN
)
DH
t
WLAX
Programming
)
(t
AH
t
WHWH1
)
Command
Verify
DATA IN
t
t
ELQV
= C0h
ELQX
t
GLQV
(t
(t
CE
LZ
t
WHGL
)
)
(t
Programming
t
OE
Verification
GHQZ
t
t
t
AVAV
GHQZ
AXQX
)
(t
(t
DF
(t
(t
RC
DF
OH
)
)
)
)
VALID
DATA
OUT
Power-down
Standby,
t
GLQX
14727F-17
(t
OLZ
)