EN29GL064 Datasheet, PDF (27/66 Pages) Eon Silicon Solution Inc. – 64 Megabit (8192K x 8-bit / 4096K x 16-bit) Flash Memory

Figure 8. Write Operation Status Flowchart
Preliminary EN29GL064
DQ6: Toggle Bit I
Toggle Bit I on DQ6 indicates whether an Embedded Program or Erase algorithm is in progress or
complete, or whether the device has entered the Erase Suspend mode. Toggle Bit I may be read at any
address, and is valid after the rising edge of the final WE# pulse in the command sequence (prior to the
program or erase operation), and during the sector erase time-out.
During an Embedded Program or Erase algorithm operation, successive read cycles to any address that
is being programmed or erased causes DQ6 to toggle. When the operation is complete, DQ6 stops
toggling.
After an erase command sequence is written, if all sectors selected for erasing are protected, DQ6
toggles for approximately 100 s, then returns to reading array data. If not all selected sectors are
protected, the Embedded Erase algorithm erases the unprotected sectors, and ignores the selected
sectors that are protected.
The system can use DQ6 and DQ2 together to determine whether a sector is actively erasing or is erase
This Data Sheet may be revised by subsequent versions
27
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc.,
Rev. A, Issue Date: 2009/3/20
www.eonssi.com