am41pds3228d Meet Spansion Inc., am41pds3228d Datasheet - Page 53

• Manufacturer Part Number: am41pds3228d
• Description: 32 Mbit 2 M ? 16-bit Cmos 1.8 Volt-only, Simultaneous Operation Page Mode Flash Memory And 8 Mbit 1 M ? 8-bit/512 K ? 16-bit Static Ram Preliminary
• Manufacturer: Meet Spansion Inc.

SRAM AC CHARACTERISTICS
Write Cycle
Notes:
1. WE# controlled, if CIOs is low, ignore UB#s and LB#s timing.
2. t
3. t
4. t
5. A write occurs during the overlap (t
52
asserting UB#s or LB#s for a single byte operation or simultaneously asserting UB#s and LB#s for a double byte operation. A
write ends at the earliest transition when CE1#s goes high and WE# goes high. The t
to the end of write.
CW
WR
AS
Parameter
Symbol
is measured from the address valid to the beginning of write.
is measured from CE1#s going low to the end of write.
is measured from the end of write to the address change. t
t
t
t
t
t
t
t
t
t
WHZ
t
t
WC
WR
DW
OW
Cw
AW
BW
WP
DH
AS
Address
CS1#s
CS2s
UB#s, LB#s
WE#
Data In
Data Out
Description
Write Cycle Time
Chip Enable to End of Write
Address Setup Time
Address Valid to End of Write
UB#s, LB#s to End of Write
Write Pulse Time
Write Recovery Time
Write to Output High-Z
Data to Write Time Overlap
Data Hold from Write Time
End Write to Output Low-Z
Figure 30. SRAM Write Cycle—WE# Control
WP
) of low CE#1 and low WE#. A write begins when CE1#s goes low and WE# goes low when
Data Undefined
High-Z
(See Note 4)
P R E L I M I N A R Y
t
AS
Am41PDS3228D
t
WR
WHZ
(See Note 2)
(See Note 2)
applied in case a write ends as CE1#s or WE# going high.
t
AW
t
(See Note 5)
WC
t
t
t
CW
BW
CW
t
WP
Max
t
Min
Min
Min
Min
Min
Min
Min
Min
Min
Min
min
DW
Data Valid
WP
is measured from the beginning of write
t
WR
t
DH
t
(See Note 3)
OW
10, 11
70
60
60
60
50
20
30
0
0
0
0
5
High-Z
May 13, 2002
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns