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參數(shù)資料
| 型號： | CY7C025-35AC |
| 英文描述： | x16 Dual-Port SRAM |
| 中文描述： | x16雙端口SRAM |
| 文件頁數(shù)： | 8/20頁 |
| 文件大小： | 301K |
| 代理商： | CY7C025-35AC |
CY7C138AV/144AV/006AV
CY7C139AV/145AV/016AV
CY7C007AV/017AV
Document #: 38-06051 Rev. *A
Page 16 of 20
Table 1. Non-Contending Read/Write
Inputs
Outputs
CE
R/W
OE
SEM
I/O0–I/O8
Operation
H
X
H
High Z
Deselected: Power-Down
H
L
Data Out
Read Data in Semaphore Flag
X
H
X
High Z
I/O Lines Disabled
H
X
L
Data In
Write into Semaphore Flag
L
H
L
H
Data Out
Read
L
X
H
Data In
Write
L
X
L
Not Allowed
Table 2. Interrupt Operation Example (assumes BUSYL=BUSYR=HIGH)
Left Port
Right Port
Function
R/WL
CEL
OEL
A0L–14L
INTL
R/WR
CER
OER
A0R–14R
INTR
Set Right INTR Flag
L
X
FFF[45]
X
L[46]
Reset Right INTR Flag
X
L
FFF[45]
H[47]
Set Left INTL Flag
X
L[47]
L
X
1FFE[45]
X
Reset Left INTL Flag
X
L
1FFE[45]
H[46]
X
Table 3. Semaphore Operation Example
Function
I/O0–I/O8 Left
I/O0–I/O8 Right
Status
No action
1
Semaphore free
Left port writes 0 to semaphore
0
1
Left Port has semaphore token
Right port writes 0 to semaphore
0
1
No change. Right side has no write access to semaphore
Left port writes 1 to semaphore
1
0
Right port obtains semaphore token
Left port writes 0 to semaphore
1
0
No change. Left port has no write access to semaphore
Right port writes 1 to semaphore
0
1
Left port obtains semaphore token
Left port writes 1 to semaphore
1
Semaphore free
Right port writes 0 to semaphore
1
0
Right port has semaphore token
Right port writes 1 to semaphore
1
Semaphore free
Left port writes 0 to semaphore
0
1
Left port has semaphore token
Left port writes 1 to semaphore
1
Semaphore free
Note:
45. See Functional Description for specific addresses by device part number.
46. If BUSYL = L, then no change.
47. If BUSYR = L, then no change.
相關PDF資料 |
PDF描述 |
|---|---|
| CY7C025-35JC | SRAM|8KX16|CMOS|LDCC|84PIN|PLASTIC |
| CY7C025-55AC | x16 Dual-Port SRAM |
| CY7C025-55JC | SRAM|8KX16|CMOS|LDCC|84PIN|PLASTIC |
| CY7C025AV | Memory |
| CY7C026A | Memory |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CY7C025-35AI | 制造商:Cypress Semiconductor 功能描述: |
| CY7C025-35AIT | 制造商:Rochester Electronics LLC 功能描述:5V 8K X 16 DPSRAM - Bulk |
| CY7C025-35AXC | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:4K x 16/18 and 8K x 16/18 Dual-Port Static RAM with SEM, INT, BUSY |
| CY7C025-35AXI | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:4K x 16/18 and 8K x 16/18 Dual-Port Static RAM with SEM, INT, BUSY |
| CY7C025-35JC | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Cypress Semiconductor 功能描述:CY7C025 Series 128 kb (8 K x 16) 5 V 35 ns Dual-Port Static RAM -PLCC-84 |
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