S29GL256S10DHI010 Spansion Inc., S29GL256S10DHI010 Datasheet - Page 41

• Manufacturer Part Number: S29GL256S10DHI010
• Manufacturer: Spansion Inc.

Specifications of S29GL256S10DHI010

• Lead Free Status / Rohs Status: Compliant

February 11, 2011 S29GL_128S_01GS_00_01
5.4.3.2
5.4.3.3
Note:
1. DQ7 should be rechecked even if DQ5 = 1 because DQ7 may change simultaneously with DQ5.
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 Program Suspend or 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).
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 the sector selected for erasing is protected, DQ6 toggles for
approximately 100 µs, then the EAC returns to standby (read mode). If the selected sector is not protected,
the Embedded Erase algorithm erases the unprotected sector.
The system can use DQ6 and DQ2 together to determine whether a sector is actively erasing or erase-
suspended. When the device is actively erasing (that is, the Embedded Erase algorithm is in progress), DQ6
toggles. When the device enters the Program Suspend mode or 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
DQ6 also toggles during the erase-suspend-program mode, and stops toggling once the Embedded Program
algorithm is complete.
Table 5.5 on page 44
algorithm in flowchart form, and the
Figure 5.6 on page 43
between DQ2 and DQ6 in graphical form. See also
DQ3: Sector Erase Timer
After writing a sector erase command sequence, the system may read DQ3 to determine whether or not
erasure has begun. See
After the sector erase command is written, the system should read the status of DQ7 (Data# Polling) or DQ6
(Toggle Bit I) to ensure that the device has accepted the command sequence, and then read DQ3. If DQ3 is
1, the Embedded Erase algorithm has begun; all further commands (except Erase Suspend) are ignored until
the erase operation is complete.
bits.
D a t a
S h e e t
shows the outputs for Toggle Bit I on DQ6.
shows the toggle bit timing diagrams.
Sector Erase on page 33
( A d v a n c e
Table 5.5 on page 44
GL-S MirrorBit
Reading Toggle Bits DQ6/DQ2 on page 42
Figure 5.5 Data# Polling Algorithm
No
DQ7: Data# Polling on page
I n f o r m a t i o n )
Read DQ 7 -DQ0
Read DQ7 -DQ0
®
DQ7 = Data?
DQ7 = Data?
DQ5 = 1?
Family
START
for more details.
FAIL
DQ2: Toggle Bit II on page
No
No
Yes
shows the status of DQ3 relative to the other status
-
Figure 5.2 on page 30
Yes
Yes
Figure 5.6 on page 43
PASS
40).
42.
explains the algorithm.
shows the differences
shows the toggle bit
41