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MX29F200BMC-70 参数 Datasheet PDF下载

MX29F200BMC-70图片预览
型号: MX29F200BMC-70
PDF下载: 下载PDF文件 查看货源
内容描述: 2M- BIT [ 256Kx8 / 128Kx16 ] CMOS FLASH MEMORY [2M-BIT [256Kx8/128Kx16] CMOS FLASH MEMORY]
分类和应用:
文件页数/大小: 46 页 / 720 K
品牌: Macronix [ MACRONIX INTERNATIONAL ]
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MX29F200T/B  
SECTOR ERASE COMMANDS  
ERASE SUSPEND  
TheAutomaticSectorErasedoesnotrequirethedevice  
to be entirely pre-programmed prior to executing the  
AutomaticSet-upSectorErasecommandandAutomatic  
SectorErasecommand. UponexecutingtheAutomatic  
Sector Erase command, the device will automatically  
program and verify the sector(s) memory for an all-zero  
data pattern. The system does not require to provide  
any control or timing during these operations.  
This command is only valid while the state machine is  
executing Automatic Sector Erase operation, and  
thereforewillonlyberespondedtoperiodduringAutomatic  
Sector Erase operation. Writing the Erase Suspend  
commandduringtheSectorErasetime-outimmediately  
terminates the time-out period and suspends the erase  
operation. After this command has been executed, the  
commandregisterwillinitiateerasesuspendmode. The  
statemachinewillreturntoreadmodeautomaticallyafter  
suspendisready. Atthistime,statemachineonlyallows  
the command register to respond to the Read Memory  
Array, Erase Resume and Program commands.  
Whenthesector(s)isautomaticallyverifiedtocontainan  
all-zeropattern,aself-timedsectoreraseandverification  
begin. Theeraseandverificationoperationsarecomplete  
when the data on Q7 is "1" and the data on Q6 stops  
toggling for two consecutive read cycles, at which time  
the device returns to the Read mode. The system does  
not require to provide any control or timing during these  
operations.  
The system can determine the status of the program  
operation using the Q7 or Q6 status bits, just as in the  
standard program operation. After an erase-suspend  
program operation is complete, the system can once  
again read array data within non-suspended sectors.  
WhenusingtheAutomaticSectorErasealgorithm, note  
that the erase automatically terminates when adequate  
erase margin has been achieved for the memory array  
(no erase-verified command is required). Sector erase  
isasix-buscycleoperation. Therearetwo"unlock"write  
cycles. Thesearefollowedbywritingtheset-upcommand  
80H. Two more "unlock" write cycles are then followed  
by the sector erase command 30H. The sector address  
is latched on the falling edge of WE, while the  
command(data) is latched on the rising edge of WE.  
Sectoraddressesselectedareloadedintointernalregister  
on the sixth falling edge of WE. Each successive sector  
load cycle started by the falling edge of WE must begin  
within 30us from the rising edge of the preceding WE.  
Otherwise, the loading period ends and internal auto  
sectorerasecyclestarts. (MonitorQ3todetermineifthe  
sector erase timer window is still open, see section Q3,  
Sector Erase Timer.) Any command other than Sector  
Erase (30H) or Erase Suspend (B0H) during the time-  
out period resets the derice to read mode.  
P/N:PM0549  
REV. 1.3 , DEC. 24, 2001  
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