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S71WS512NE0BFWZZ 데이터시트(HTML) 55 Page - SPANSION

부품명 S71WS512NE0BFWZZ
상세내용  Stacked Multi-Chip Product (MCP) Flash Memory and pSRAM CMOS 1.8 Volt
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June 28, 2004 S71WS512NE0BFWZZ_00_A1
S29WSxxxN MirrorBit™ Flash Family For Multi-chip Products (MCP)
55
Ad vance
Info rmat i o n
The system must write the reset command to return to the read mode (or erase-
suspend-read mode if the bank was previously in Erase Suspend).
Enter SecSi™ Sector/Exit SecSi Sector Command Sequence
The SecSi Sector region provides a secured data area containing a random, eight
word electronic serial number (ESN). The system can access the SecSi Sector re-
gion by issuing the three-cycle Enter SecSi Sector command sequence. The
device continues to access the SecSi Sector region until the system issues the
four-cycle Exit SecSi Sector command sequence. The Exit SecSi Sector command
sequence returns the device to normal operation. The SecSi Sector is not acces-
sible when the device is executing an Embedded Program or embedded Erase
algorithm. The "Command Definition Summary" section shows the address and
data requirements for both command sequences.
Word Program Command Sequence
Programming is a four-bus-cycle operation. The program command sequence is
initiated by writing two unlock write cycles, followed by the program set-up com-
mand. The program address and data are written next, which in turn initiate the
Embedded Program algorithm. The system is not required to provide further con-
trols or timings. The device automatically provides internally generated program
pulses and verifies the programmed cell margin.
Device ID, Word 2
(BA) + 0Eh
2230 (WS256N)
Device ID, Word 3
(BA) + 0Fh
2200
Indicator Bits
(BA) + 03h
DQ15 - DQ8 = 0
DQ7 - Factory Lock Bit
1 = Locked, 0 = Not Locked
DQ6 -Customer Lock Bit
1 = Locked, 0 = Not Locked
DQ5 - Handshake Bit
1 = Reserved,
0 = Standard Handshake
DQ4 & DQ3 - WP# Protection Boot Code
00 = WP# Protects both Top Boot and
Bottom Boot Sectors,
01 = Reserved,
10 = Reserved
11 = Reserved
DQ2 = 0
DQ1 - DYB Power up state
(DQ1 = Lock Register DQ4)
1 = Unlocked (user option)
0 = Locked (default)
DQ0 - PPB Eraseability
(DQ0 = Lock Register DQ3)
1 = Erase allowed
0 = Erase disabled
Table 17. Autoselect Addresses
Description
Address
Read Data


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