S71GS128NB0 SPANSION [SPANSION], S71GS128NB0 Datasheet - Page 86
S71GS128NB0
Manufacturer Part Number
S71GS128NB0
Description
128N based MCPs
Manufacturer
SPANSION [SPANSION]
Datasheet
1.S71GS128NB0.pdf
(195 pages)
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86
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
N o t e :
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
Complete, Write
Reset Command
Read DQ7–DQ0
Read DQ7–DQ0
Read DQ7–DQ0
Program/Erase
Operation Not
A d v a n c e
Toggle Bit
Toggle Bit
DQ5 = 1?
= Toggle?
= Toggle?
START
Twice
Yes
Yes
Yes
TM
Flash Family
I n f o r m a t i o n
Operation Complete
No
No
Program/Erase
S29GLxxxN_MCP_A1 December 15, 2004
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