s71gl128nc0 Meet Spansion Inc., s71gl128nc0 Datasheet - Page 87

• Manufacturer Part Number: s71gl128nc0
• Description: Stacked Multi-chip Product Mcp 512/256/128 Megabit 32/16/8 M X 16-bit Cmos 3.0 Volt-only Mirrorbittm Page-mode Flash Memory With 64 Megabit 4m X 16-bit Psram
• Manufacturer: Meet Spansion Inc.

December 15, 2004 S29GLxxxN_MCP_A1
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.
DQ2 toggles when the system reads at addresses within those sectors that have
been selected for erasure. (The system may use either OE# or CE# to control the
A d v a n c e
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.
No
Figure 6. Toggle Bit Algorithm
S29GLxxxN MirrorBit
Read Byte Twice
DQ6 = Toggle?
DQ6 = Toggle?
Adrdess = VA
Address = VA
Address = VA
I n f o r m a t i o n
(DQ 0-DQ7)
(DQ0-DQ7)
(DQ0-DQ7)
Read Byte
Read Byte
DQ5 = 1?
START
FAIL
Yes
Yes
Yes
TM
Flash Family
No
No
PASS
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