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S71WS512NE0BFWZZ 데이터시트(HTML) 71 Page - SPANSION

부품명 S71WS512NE0BFWZZ
상세내용  Stacked Multi-Chip Product (MCP) Flash Memory and pSRAM CMOS 1.8 Volt
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S71WS512NE0BFWZZ 데이터시트(HTML) 71 Page - SPANSION

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June 28, 2004 S71WS512NE0BFWZZ_00_A1
S29WSxxxN MirrorBit™ Flash Family For Multi-chip Products (MCP)
71
Ad vance
Info rmat i o n
array data. If not all selected sectors are protected, the Embedded Erase algo-
rithm erases the unprotected sectors, and ignores the selected sectors that are
protected.
The system can use DQ6 and DQ2 together to determine whether a sector is ac-
tively 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 en-
ters the Erase Suspend mode, DQ6 stops toggling. However, the system must
also use DQ2 to determine which sectors are erasing or erase-suspended. Alter-
natively, the system can use DQ7 (see the subsection on DQ7: Data# Polling).
If a program address falls within a protected sector, DQ6 toggles for approxi-
mately 1 ms 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.
See the following for additional information: Figure 6, "DQ6: Toggle Bit I" section,
Figure 25 (toggle bit timing diagram), and Table 19.
Toggle Bit I on DQ6 requires either OE# or CE# to be deasserted and reasserted
to show the change in state.
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.
Figure 6. Toggle Bit Algorithm
START
No
Yes
Yes
DQ5 = 1?
No
Yes
Toggle Bit
= Toggle?
No
Program/Erase
Operation Not
Complete, Write
Reset Command
Program/Erase
Operation Complete
Toggle Bit
= Toggle?
Read Byte Twice
(DQ7–DQ0)
Address = VA
Read Byte
(DQ7–DQ0)
Address =VA
Read Byte
(DQ7–DQ0)
Address =VA


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