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| 型號： | AM41PDS3224DT11IT |
| 廠商： | SPANSION LLC |
| 元件分類： | 存儲器 |
| 英文描述： | SPECIALTY MEMORY CIRCUIT, PBGA73 |
| 封裝： | 8 X 11.60 MM, FBGA-73 |
| 文件頁數(shù)： | 51/59頁 |
| 文件大小： | 1072K |
| 代理商： | AM41PDS3224DT11IT |
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54
Am41PDS3224D
May 13, 2002
P R E L IMINARY
SRAM AC CHARACTERISTICS
Notes:
1. UB#s and LB#s controlled, CIOs must be high.
2. tCW is measured from CE1#s going low to the end of write.
3. t
WR is measured from the end of write to the address change. tWR applied in case a write ends as CE1#s or WE# going high.
4. t
AS is measured from the address valid to the beginning of write.
5. A write occurs during the overlap (t
WP) of low CE#1 and low WE#. A write begins when CE1#s goes low and WE# goes low when
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
WP is measured from the beginning of write
to the end of write.
Figure 32.
SRAM Write Cycle—UB#s and LB#s Control
Address
Data Valid
UB#s, LB#s
WE#
Data In
Data Out
High-Z
tWC
CE1#s
CE2s
tAW
tBW
tDW
tDH
tWR (See Note 3)
tAS
(See Note 4)
tCW
(See Note 2)
tCW (See Note 2)
tWP
(See Note 5)
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