參數(shù)資料
    

    


    


    
型號(hào)：
HYB25D256160BTL-6

    

    
廠商：
INFINEON TECHNOLOGIES AG

    

    
英文描述：
256 Mbit Double Data Rate SDRAM

    

    
中文描述：
256兆雙倍數(shù)據(jù)速率SDRAM

    

    
文件頁(yè)數(shù)：
18/94頁(yè)

    

    
文件大?。?/td>
3326K

    

    
代理商：
HYB25D256160BTL-6


    

    

    

	
    
    
    

    
    
	
    Data Sheet
    25
    Rev. 1.6, 2004-12
    HYB25D256[16/40/80]0C[E/C/F/T](L)
    256 Mbit Double-Data-Rate SDRAM
    Functional Description
    3.2.3
    Read Latency
    The Read latency, or CAS latency, is the delay, in clock cycles, between the registration of a Read command and
    the availability of the first burst of output data. The latency can be programmed 2, 2.5 and 3 clocks. CAS latency
    of 1.5 is supported for DDR200 components only.
    If a Read command is registered at clock edge n, and the latency is m clocks, the data is available nominally
    coincident with clock edge n + m (see Figure 6).
    Reserved states should not be used as unknown operation or incompatibility with future versions may result.
    3.2.4
    Operating Mode
    The normal operating mode is selected by issuing a Mode Register Set Command with bits A7-A12 set to zero,
    and bits A0-A6 set to the desired values. A DLL reset is initiated by issuing a Mode Register Set command with
    bits A7 and A9-A12 each set to zero, bit A8 set to one, and bits A0-A6 set to the desired values. A Mode Register
    Set command issued to reset the DLL should always be followed by a Mode Register Set command to select
    normal operating mode.
    All other combinations of values for A7-A12 are reserved for future use and/or test modes. Test modes and
    reserved states should not be used as unknown operation or incompatibility with future versions may result.
    Figure 6
    Required CAS Latencies
    NOP
    Read
    CAS Latency = 2, BL = 4
    Shown with nominal tAC, tDQSCK, and tDQSQ.
    CK
    Command
    DQS
    DQ
    Don’t Care
    CL=2
    NOP
    Read
    CAS Latency = 2.5, BL = 4
    CK
    Command
    DQS
    DQ
    CL=2.5
    
    
    
    
    
    


    


    

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    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
HYB25D256160BTL-7
 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:256 Mbit Double Data Rate SDRAM

    

    
HYB25D256160BTL-7F
 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:256-Mbit Double Data Rate SDRAM, Die Rev. B

    

    
HYB25D256160BTL-8
 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:256 Mbit Double Data Rate SDRAM

    

    
HYB25D256160CC-5
 制造商:QIMONDA 制造商全稱:QIMONDA 功能描述:256-Mbit Double-Data-Rate SDRAM

    

    
HYB25D256160CC-6
 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:256 Mbit Double Data Rate SDRAM

    

    
    
    
    
	
    	
    
    
     
     
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