S29PL064J70BFI120 Datasheet, PDF (70/100 Pages) SPANSION – CMOS 3.0 Volt-Only, Simultaneous-Read/Write Flash Memory with Enhanced VersatileIO Control

Data Sheet
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 DQ7: Data# Polling on page 68).
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 72 shows the outputs for Toggle Bit I on DQ6. Figure 16.2 on page 70 shows the toggle
bit algorithm. Figure 20.11 on page 84 in shows the toggle bit timing diagrams. Figure 20.12 on page 84
shows the differences between DQ2 and DQ6 in graphical form. See also the DQ2: Toggle Bit II on page 71.
Figure 16.2 Toggle Bit Algorithm
START
Read Byte
(DQ7–DQ0)
Address =VA
Read Byte
(DQ7–DQ0)
Address =VA
Toggle Bit
No
= Toggle?
Yes
No
DQ5 = 1?
Yes
Read Byte Twice
(DQ7–DQ0)
Address = VA
Toggle Bit
No
= Toggle?
Yes
Program/Erase
Operation Not
Complete, Write
Reset Command
Program/Erase
Operation 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 DQ6:
Toggle Bit I on page 69 and DQ2: Toggle Bit II on page 71 for more information.
70
S29PL-J
S29PL-J_00_A16 April 18, 2013