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WED9LC6816V1312BI 参数 Datasheet PDF下载

WED9LC6816V1312BI图片预览
型号: WED9LC6816V1312BI
PDF下载: 下载PDF文件 查看货源
内容描述: 256Kx32 SSRAM / SDRAM 4Mx32 [256Kx32 SSRAM/4Mx32 SDRAM]
分类和应用: 存储内存集成电路静态存储器动态存储器
文件页数/大小: 27 页 / 1138 K
品牌: WEDC [ WHITE ELECTRONIC DESIGNS CORPORATION ]
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WED9LC6816V  
White Electronic Designs  
SSRAM Operation Truth Table  
Operation  
Address Used  
None  
SSCE# SSADS# SSWE# SSOE#  
DQ  
High-Z  
D
Deselected Cycle, Power Down  
WRITE Cycle, Begin Burst  
READ Cycle, Begin Burst  
READ Cycle, Begin Burst  
READ Cycle, Suspend Burst  
READ Cycle, Suspend Burst  
READ Cycle, Suspend Burst  
READ Cycle, Suspend Burst  
WRITE Cycle, Suspend Burst  
WRITE Cycle, Suspend Burst  
H
L
L
L
X
L
X
X
L
External  
External  
External  
Current  
Current  
Current  
Current  
Current  
Current  
L
L
H
H
H
H
H
H
L
Q
L
L
H
L
High-Z  
Q
X
X
H
H
X
H
H
H
H
H
H
H
H
L
High-Z  
Q
H
X
X
High-Z  
D
D
L
NOTE:  
1. X means “don’t care”, H means logic HIGH. L means logic LOW.  
2. All inputs except SSOE# must meet setup and hold times around the rising edge (LOW to HIGH) of SSCK.  
3. Suspending burst generates wait cycle  
4. For a write operation following a read operation, SSOE# must be HIGH before the input data required setup time plus High-Z time  
for SSOE# and staying HIGH through out the input data hold time.  
5. This device contains circuitry that will ensure the outputs will be in High-Z during power-up.  
SSRAM Partial Truth Table  
Function  
SSWE#  
BWE0#  
BWE1# BWE2# BWE3#  
READ  
H
X
X
X
X
WRITE one Byte (DQ0-7)  
WRITE all Bytes  
L
L
L
L
H
L
H
L
H
L
Contact factory for ordering information.  
White Electronic Designs Corp. reserves the right to change products or specifications without notice.  
September, 2003  
Rev. 1  
6
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com