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HM5225805BLTT-75 参数 Datasheet PDF下载

HM5225805BLTT-75图片预览
型号: HM5225805BLTT-75
PDF下载: 下载PDF文件 查看货源
内容描述: LVTTL 256M SDRAM接口的133 MHz / 100 MHz的4 Mword 】 16位】 4银行/ 8 - Mword 】 8位】 4银行/ 16 Mword 】 4位】 4银行PC / 133 , PC / 100 SDRAM [256M LVTTL interface SDRAM 133 MHz/100 MHz 4-Mword 】 16-bit 】 4-bank/8-Mword 】 8-bit 】 4-bank /16-Mword 】 4-bit 】 4-bank PC/133, PC/100 SDRAM]
分类和应用: 存储内存集成电路光电二极管动态存储器PC时钟
文件页数/大小: 63 页 / 454 K
品牌: ELPIDA [ ELPIDA MEMORY ]
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HM5225165B/HM5225805B/HM5225405B-75/A6/B6  
Write command to Read command interval:  
1. Same bank, same ROW address: When the read command is executed at the same ROW address of the  
same bank as the preceding write command, the read command can be performed after an interval of no less  
than 1 clock. However, in the case of a burst write, data will continue to be written until one clock before the  
read command is executed.  
WRITE to READ Command Interval (1)  
CLK  
Command  
WRIT  
in A0  
READ  
DQM,  
DQMU/DQML  
Din  
Dout  
out B0  
out B1  
out B2  
out B3  
Column = A  
Write  
Burst Write Mode  
CAS Latency = 2  
Burst Length = 4  
Bank 0  
CAS Latency  
Column = B  
Dout  
Column = B  
Read  
WRITE to READ Command Interval (2)  
CLK  
WRIT  
in A0  
READ  
Command  
DQM,  
DQMU/DQML  
Din  
in A1  
Dout  
out B0  
out B1  
out B2  
out B3  
Burst Write Mode  
CAS Latency = 2  
Burst Length = 4  
Bank 0  
Column = A  
Write  
CAS Latency  
Column = B  
Dout  
Column = B  
Read  
2. Same bank, different ROW address: When the ROW address changes, consecutive read commands  
cannot be executed; it is necessary to separate the two commands with a precharge command and a bank-  
active command.  
3. Different bank: When the bank changes, the read command can be performed after an interval of no less  
than 1 clock, provided that the other bank is in the bank-active state. However, in the case of a burst write,  
data will continue to be written until one clock before the read command is executed (as in the case of the  
same bank and the same address).  
Data Sheet E0082H10  
30  
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