s29jl032j Meet Spansion Inc., s29jl032j Datasheet - Page 40

• Manufacturer Part Number: s29jl032j
• Description: 32megabit 4m X 8-bit/2m X 16-bit Cmos 3.0volt-only, Simultaneous Read/write Flash Memory
• Manufacturer: Meet Spansion Inc.

40
During an Embedded Program or Erase algorithm operation, successive read cycles to any address cause
DQ6 to toggle. The system may use either OE# or CE# to control the read cycles. 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 3 ms, 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-
suspended. When the device is actively erasing (that is, the Embedded Erase algorithm is in progress), DQ6
toggles. When the device enters the Erase Suspend mode, DQ6 stops toggling. However, the system must
also use DQ2 to determine which sectors are erasing or erase-suspended. Alternatively, the system can use
DQ7 (see
If a program address falls within a protected sector, DQ6 toggles for approximately 1 µs after the program
command sequence is written, then returns to reading array data.
DQ6 also toggles during the erase-suspend-program mode, and stops toggling once the Embedded Program
algorithm is complete.
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.
DQ7: Data# Polling on page
D a t a
S h e e t
Figure 11.2 Toggle Bit Algorithm
38).
S29JL032J
No
( A d v a n c e
Complete, Write
Reset Command
Read Byte Twice
Program/Erase
Operation Not
Address =VA
Address =VA
Address = VA
(DQ7–DQ0)
(DQ7–DQ0)
(DQ7–DQ0)
Read Byte
Read Byte
Toggle Bit
Toggle Bit
DQ5 = 1?
= Toggle?
= Toggle?
START
Yes
Yes
Yes
I n f o r m a t i o n )
Operation Complete
No
No
Program/Erase
S29JL032J_00_01 January 27, 2010