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29F080-70 Datasheet(PDF) 9 Page - Macronix International |
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29F080-70 Datasheet(HTML) 9 Page - Macronix International |
9 / 38 page 9 P/N:PM0579 REV. 1.6, NOV. 21, 2002 MX29F080 SECTOR ERASE COMMANDS The Automatic Sector Erase does not require the device to be entirely pre-programmed prior to executing the Automatic Set-up Sector Erase command and Automatic Sector Erase command. Upon executing the Automatic Sector Erase command, the device will automatically program and verify the sector(s) memory for an all-zero data pattern. The system is not required to provide any control or timing during these operations. When the sector(s) is automatically verified to contain an all-zero pattern, a self-timed sector erase and verify begin. The erase and verify operations are complete 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 is not required to provide any control or timing during these operations. When using the Automatic Sector Erase algorithm, note that the erase automatically terminates when adequate erase margin has been achieved for the memory array (no erase verification command is required). Sector erase is a six-bus cycle operation. There are two "unlock" write cycles. These are followed by writing the set-up command 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 or CE, whichever happens later , while the command (data) is latched on the rising edge of WE or CE, whichever happens first. Sector addresses selected are loaded into internal register on the sixth falling edge of WE or CE, whichever happens later. Each successive sector load cycle started by the falling edge of WE or CE, whichever happens later must begin within 80us from the rising edge of the preceding WE or CE, whichever happens first. Otherwise, the loading period ends and internal auto sector erase cycle starts. (Monitor Q3 to determine if the 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 device to read mode. Status Q7 Q6 Q5 Q3 Q2 Byte Program in Auto Program Algorithm Q7 Toggle 0 0 1 Auto Erase Algorithm 0 Toggle 0 1 Toggle Erase Suspend Read 1 1 0 0 Toggle In Progress (Erase Suspended Sector) (Note1) Erase Suspended Mode Erase Suspend Read Data Data Data Data Data (Non-Erase Suspended Sector) Erase Suspend Program Q7 Toggle 0 0 1 (Non-Erase Suspended Sector) (Note2) (Note3) Byte Program in Auto Program Algorithm Q7 Toggle 1 0 1 Exceeded Program/Erase in Auto Erase Algorithm 0 Toggle 1 1 N/A Time Limits Erase Suspended Mode Erase Suspend Program Q7 Toggle 1 0 N/A (Non-Erase Suspended Sector) TABLE 4. WRITE OPERATION STATUS Notes: 1. Performing successive read operations from the erase-suspended sector will cause Q2 to toggle. 2. Performing successive read operations from any address will cause Q6 to toggle. 3. Reading the byte address being programmed while in the erase-suspend program mode will indicate logic "1" at the Q2 bit. However, successive reads from the erase-suspended sector will cause Q2 to toggle. |
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