P r e l i m i n a r y
START
Read DQ7–DQ0
Read DQ7–DQ0
No
Toggle Bit
= Toggle?
Yes
No
DQ5 = 1?
Yes
Read DQ7–DQ0
Twice
Toggle Bit
= Toggle?
No
Yes
Program/Erase
Operation Not
Program/Erase
Operation Complete
Complete, Write
Reset Command
Note:
The system should recheck the toggle bit even if DQ5 = “1”
because the toggle bit may stop toggling as DQ5 changes
to “1.” See the subsections on DQ6 and DQ2 for more
information.
Figure 8. Toggle Bit Algorithm
DQ2: Toggle Bit II
The “Toggle Bit II” on DQ2, when used with DQ6, indicates whether a particular
sector is actively erasing (that is, the Embedded Erase algorithm is in progress),
or whether that sector is erase-suspended. Toggle Bit II is valid after the rising
edge of the final WE# pulse in the command sequence.
118
S29GLxxxM MirrorBitTM Flash Family
S29GLxxxM_00A5 April 30, 2004
SPANSION [ SPANSION ]
