參數(shù)資料
型號: CY7C1475V25-133BGI
廠商: CYPRESS SEMICONDUCTOR CORP
元件分類: DRAM
英文描述: 72-Mbit (2M x 36/4M x 18/1M x 72) Flow-Through SRAM with NoBL⑩ Architecture
中文描述: 1M X 72 ZBT SRAM, 6.5 ns, PBGA209
封裝: 14 X 22 MM, 1.76 MM HEIGHT, FBGA-209
文件頁數(shù): 11/32頁
文件大?。?/td> 928K
代理商: CY7C1475V25-133BGI
CY7C1471V25
CY7C1473V25
CY7C1475V25
Document #: 38-05287 Rev. *I
Page 11 of 32
Truth Table
The truth table for CY7C1471V25, CY7C1473V25, and CY7C1475V25 follows.
[2, 3, 4, 5, 6, 7, 8]
Operation
Address
Used
None
None
None
None
External
CE
1
CE
2
CE
3
ZZ
ADV/LD
WE
BW
X
OE
CEN
CLK
DQ
Deselect Cycle
Deselect Cycle
Deselect Cycle
Continue Deselect Cycle
Read Cycle
(Begin Burst)
Read Cycle
(Continue Burst)
NOP/Dummy Read
(Begin Burst)
Dummy Read
(Continue Burst)
Write Cycle
(Begin Burst)
Write Cycle
(Continue Burst)
NOP/Write Abort
(Begin Burst)
Write Abort
(Continue Burst)
Ignore Clock Edge (Stall)
Sleep Mode
H
X
X
X
L
X
X
L
X
H
X
H
X
X
L
L
L
L
L
L
L
L
L
H
L
X
X
X
X
H
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
L->H
L->H
L->H
L->H
L->H Data Out (Q)
Tri-State
Tri-State
Tri-State
Tri-State
Next
X
X
X
L
H
X
X
L
L
L->H Data Out (Q)
External
L
H
L
L
L
H
X
H
L
L->H
Tri-State
Next
X
X
X
L
H
X
X
H
L
L->H
Tri-State
External
L
H
L
L
L
L
L
X
L
L->H
Data In (D)
Next
X
X
X
L
H
X
L
X
L
L->H
Data In (D)
None
L
H
L
L
L
L
H
X
L
L->H
Tri-State
Next
X
X
X
L
H
X
H
X
L
L->H
Tri-State
Current
None
X
X
X
X
X
X
L
H
X
X
X
X
X
X
X
X
H
X
L->H
X
-
Tri-State
Notes
2. X = “Don't Care.” H = Logic HIGH, L = Logic LOW. BW
= L signifies at least one Byte Write Select is active, BW
X
= Valid signifies that the desired Byte Write
Selects are asserted, see
“Truth Table for Read/Write” on page 12
for details.
3. Write is defined by BW
, and WE. See
“Truth Table for Read/Write” on page 12
.
4. When a write cycle is detected, all IOs are tri-stated, even during byte writes.
5. The DQs and DQP
pins are controlled by the current cycle and the OE signal. OE is asynchronous and is not sampled with the clock.
6. CEN = H, inserts wait states.
7. Device powers up deselected with the IOs in a tri-state condition, regardless of OE.
8. OE is asynchronous and is not sampled with the clock rise. It is masked internally during write cycles. During a read cycle DQs and DQP
X
= tri-state when OE
is inactive or when the device is deselected, and DQs and DQP
X
= data when OE is active.
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CY7C1475V25-133BGXI 72-Mbit (2M x 36/4M x 18/1M x 72) Flow-Through SRAM with NoBL⑩ Architecture
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