參數(shù)資料
型號(hào)： CY7C0251AV-25AC
英文描述： x18 Dual-Port SRAM
中文描述： x18雙端口SRAM
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 301K
代理商： CY7C0251AV-25AC
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.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY7C0251AV-25AI 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:3.3V 4K/8K/16K x 16/18 Dual-Port Static RAM
CY7C0251E-15AXC 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 8K x 18 DualPort RAM W/SEM INT BUSY RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪問時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
CY7C0251V 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:3.3V 4K/8K/16K x 16/18 Dual-Port Static RAM
CY7C025-25AC 功能描述:IC SRAM 8KX16 DUAL 84-PLCC RoHS:否 類別:集成電路 (IC) >> 存儲(chǔ)器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 格式 - 存儲(chǔ)器:EEPROMs - 串行 存儲(chǔ)器類型:EEPROM 存儲(chǔ)容量:4K (512 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-MFP 包裝:帶卷 (TR)
CY7C025-25ACT 制造商:Cypress Semiconductor 功能描述:
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