S29PL-J SPANSION [SPANSION], S29PL-J Datasheet - Page 68

• Manufacturer Part Number: S29PL-J
• Description: CMOS 3.0 Volt-only, Simultaneous-Read/Write Flash Memory with Enhanced VersatileIO Control
• Manufacturer: SPANSION [SPANSION]

66
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 the
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.
Table 16.1 on page 68
bit algorithm.
shows the differences between DQ2 and DQ6 in graphical form. See also the
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
Toggle Bit I on page 65
Figure 20.11 on page 80
DQ7: Data# Polling on page
and
DQ2: Toggle Bit II on page 67
shows the outputs for Toggle Bit I on DQ6.
D a t a
S h e e t
Figure 16.2 Toggle Bit Algorithm
No
in shows the toggle bit timing diagrams.
S29PL-J
64).
Read DQ7–DQ0
Read DQ7–DQ0
DQ7 = Data?
DQ7 = Data?
( A d v a n c e
Addr = VA
Addr = VA
DQ5 = 1?
for more information.
START
FAIL
No
Yes
No
Yes
Yes
I n f o r m a t i o n )
Figure 16.2 on page 66
PASS
S29PL-J_00_A9 September 22, 2006
DQ2: Toggle Bit II on page
Figure 20.12 on page 80
shows the toggle
DQ6:
67.