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์ƒ์„ธ๋‚ด์šฉ  Stacked Multi-Chip Product (MCP)
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September 15, 2005 S71WS-N_01_A4
S71WS-Nx0 Based MCPs
39
Advance
Information
Figure 10.4 Write Buffer Programming Operation
10.5.3
Sector Erase
The sector erase function erases one or more sectors in the memory array. (See Table 15.1,
Memory Array Commands; and Figure 10.5, Sector Erase Operation.) The device does not re-
quire the system to preprogram prior to erase. The Embedded Erase algorithm automatically
programs and verifies the entire memory for an all zero data pattern prior to electrical erase. After
a successful sector erase, all locations within the erased sector contain FFFFh. The system is not
required to provide any controls or timings during these operations.
Write Unlock Cycles:
Address 555h, Data AAh
Address 2AAh, Data 55h
Issue
Write Buffer Load Command:
Address 555h, Data 25h
Load Word Count to Program
Program Data to Address:
SA = wc
Unlock Cycle 1
Unlock Cycle 2
wc = number of words โ€“ 1
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
wc = 0?
Write Buffer
Abort Desired?
Write Buffer
Abort?
Polling Status
= Done?
Error?
FAIL. Issue reset command
to return to read array mode.
Write to a Different
Sector Address to Cause
Write Buffer Abort
PASS. Device is in
read mode.
Confirm command:
SA = 0x29h
Wait 4
ยตs
(Recommended)
Perform Polling Algorithm
(see Write Operation Status
flowchart)
Write Next Word,
Decrement wc:
PA
data , wc = wc โ€“ 1
RESET. Issue Write Buffer
Abort Reset Command


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