•         


    
    



    

    
  
    
    
    
    
  
    
  
  

    





    


    
 
 




 
 


    

    
    


    參數(shù)資料
    

    


    


    
型號(hào)：
AM29LV200BT-90SF

    

    
廠商：
Advanced Micro Devices, Inc.

    

    
元件分類：
FLASH

    

    
英文描述：
2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

    

    
中文描述：
2兆位（256Kx8Bit/128Kx16位），3.0伏的CMOS引導(dǎo)扇區(qū)閃存

    

    
文件頁(yè)數(shù)：
17/46頁(yè)

    

    
文件大?。?/td>
716K

    

    
代理商：
AM29LV200BT-90SF


    

    

    

	
    
    
    

    
    
	
    October 10, 2006  21521D6
    Am29LV200B
    15
    D AT A  S H E E T
    COMMAND DEFINITIONS
    Writing specific address and data commands or 
    sequences into the command register initiates device 
    operations. Table 5 defines the valid register command 
    sequences. Writing 
    incorrect
    address and data 
    values
     or writing them in the 
    improper sequence
    resets the device to reading array data. 
    All addresses are latched on the falling edge of WE# or 
    CE#, whichever happens later. All data is latched on 
    the rising edge of WE# or CE#, whichever happens 
    first. Refer to the appropriate timing diagrams in the 
    “AC Characteristics” section.
    Reading Array Data
    The device is automatically set to reading array data 
    after device power-up. No commands are required to 
    retrieve data. The device is also ready to read array 
    data after completing an Embedded Program or 
    Embedded Erase algorithm.
    After the device accepts an Erase Suspend command, 
    the device enters the Erase Suspend mode. The 
    system can read array data using the standard read 
    timings, except that if it reads at an address within 
    erase-suspended sectors, the device outputs status 
    data. After completing a programming operation in the 
    Erase Suspend mode, the system may once again 
    read array data with the same exception. See “Erase 
    Suspend/Erase Resume Commands” for more infor-
    mation on this mode.
    The system 
    must
     issue the reset command to re-
    enable the device for reading array data if DQ5 goes 
    high, or while in the autoselect mode. See the “Reset 
    Command” section, next.
    See also “Requirements for Reading Array Data” in the 
    “Device Bus Operations” section for more information. 
    The Read Operations table provides the read parame-
    ters, and Figure 13 shows the timing diagram.
    Reset Command
    Writing the reset command to the device resets the 
    device to reading array data. Address bits are don’t 
    care for this command. 
    The reset command may be written between the 
    sequence cycles in an erase command sequence 
    before erasing begins. This resets the device to reading 
    array data. Once erasure begins, however, the device 
    ignores reset commands until the operation is 
    complete.
    The reset command may be written between the 
    sequence cycles in a program command sequence 
    before programming begins. This resets the device to 
    reading array data (also applies to programming in 
    Erase Suspend mode). Once programming begins, 
    however, the device ignores reset commands until the 
    operation is complete.
    The reset command may be written between the 
    sequence cycles in an autoselect command sequence. 
    Once in the autoselect mode, the reset command 
    must
    be written to return to reading array data (also applies 
    to autoselect during Erase Suspend).
    If DQ5 goes high during a program or erase operation, 
    writing the reset command returns the device to 
    reading array data (also applies during Erase 
    Suspend).
    Autoselect Command Sequence
    The autoselect command sequence allows the host 
    system to access the manufacturer and devices codes, 
    and determine whether or not a sector is protected. 
    Table 5 shows the address and data requirements. This 
    method is an alternative to that shown in Table 4, which 
    is intended for PROM programmers and requires V
    ID
    on address bit A9.
    The autoselect command sequence is initiated by 
    writing two unlock cycles, followed by the autoselect 
    command. The device then enters the autoselect 
    mode, and the system may read at any address any 
    number of times, without initiating another command 
    sequence. A read cycle at address XX00h retrieves the 
    manufacturer code. A read cycle at address XX01h in 
    word mode (or 02h in byte mode) returns the device 
    code. A read cycle containing a sector address (SA) 
    and the address 02h in word mode (or 04h in byte 
    mode) returns 01h if that sector is protected, or 00h if it 
    is unprotected. Refer to Tables 2 and 3 for valid sector 
    addresses.
    The system must write the reset command to exit the 
    autoselect mode and return to reading array data.
    Word/Byte Program Command Sequence
    The system may program the device by word or byte, 
    depending on the state of the BYTE# pin. Program-
    ming is a four-bus-cycle operation. The program 
    command sequence is initiated by writing two unlock 
    write cycles, followed by the program set-up command. 
    The program address and data are written next, which 
    in turn initiate the Embedded Program algorithm. The 
    system is 
    not
     required to provide further controls or tim-
    ings. The device automatically generates the program 
    pulses and verifies the programmed cell margin. Table 
    5 shows the address and data requirements for the 
    byte program command sequence.
    When the Embedded Program algorithm is complete, 
    the device then returns to reading array data and 
    addresses are no longer latched. The system can 
    determine the status of the program operation by using 
    
    
    
    
    
    


    


    

    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
AM29LV200BT-90SK
2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

    

    
AM29LV200BT-90WAC
2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

    

    
AM29LV200BT-90WAD
2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

    

    
AM29LV200BB-120EF
2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

    

    
AM29LV200BB-120EK
2 Megabit (256 K x 8-Bit/128 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory

    

    

    

    


    


    

    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
AM29LV256MH120RPGI
 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 256MBIT 32MX8/16MX16 120NS 64BGA - Trays

    

    
AM29LV256MH123RPGI
 制造商:Advanced Micro Devices 功能描述:

    

    
AM29LV256MH94REI
 制造商:Spansion 功能描述:256M (32MX8/16MX16) 3V REG, MIRRORBIT, TSOP56, IND - Trays

    

    
AM29LV320DB120EI
 制造商:Spansion 功能描述:Flash Mem Parallel 3V/3.3V 32M-Bit 4M x 8/2M x 16 120ns 48-Pin TSOP

    

    
AM29LV320DB120WMI
 制造商:Spansion 功能描述:Flash Mem Parallel 3V/3.3V 32M-Bit 4M x 8/2M x 16 120ns 48-Pin FBGA

    

    
    
    
    
	
    	
    
    
     
     
    發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。
    
 
     
    

   	  
    
     

    
                    			    				      
    
                
    
                  
    
                    
                    
    
                      
    
                      
                      
    采購(gòu)需求
      (若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)
    
                      
                      
    發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)
    
                      
                      
    發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)
    
                       
                        
    
                                
                                
    
                                    *型號(hào)
                                    *數(shù)量
                                    廠商
                                    批號(hào)
                                    封裝
                                  
    
                                    
                                
                                
    
                                    
                                        
    
                                            
                                            
                                        
    
                                        		
                                     
                                    
                                        
    
                                        		
                                    
                                        
    
                                        		
                                    
                                        
    
                                        		
                                    
                                        
    
                                        		
                                  
    
                                  
                                   
                                    
                            
    
                             
                             
							                            
    
                          添加更多采購(gòu)
    
                      
    
                      
                      
    
                      
                      
    我的聯(lián)系方式
    
                     
                     
                       
    
                                
                                
                                
    
                                    
                                         *
                                    
                                    
                                  
    
                                  
                                  
    
                                    
                                         *
                                    
                                    
                                  
    
                                  
                                  
    
                                    
                                        
                                    
                                    
                                  
    
                                  
                                  
    
                                    
                                         *