256Mb: 3V Embedded Parallel NOR Flash
AUTO SELECT Operations
Table 11: Block Protection
Note 1 applies to entire table
READ Cycle
Extended Memory
Block
Verify Indicator (GL) Verify Indicator (GH)
Extended Memory
Block
Block Protection
Status Indicator
Signal
Notes
CE#
L
L
L
L
L
L
OE#
WE#
H
H
H
Address Input, 8-Bit and 16-Bit
A[MAX:16]
X
X
X
X
Block base address
A[15:10]
X
VID
X
A9
VID
X
VID
X
2
A8
A[7:5]
L
L
L
A4
X
X
X
A[3:2]
L
L
L
A1
H
H
H
H
H
L
A0
Address Input, 8-Bit Only
DQ[15]/A-1
X
X
X
Data I/O, 8-Bit Only
DQ[14:8]
X
X
X
DQ[7:0]
89h
09h
99h
19h
01h
00h
3, 5
4, 6
Data I/O, 16-Bit Only
DQ[15]/A-1, and DQ[14:0]
0089h
0009h
0099h
0019h
0001h
0000h
3, 5
4, 6
1. Read cycle output to DQ7 = Extended memory block protection indicator; GL = High
block protection; GH = Low block protection; BPS = Block protection status; H = Logic
level HIGH (VIH); L = Logic level LOW (VIL); X = HIGH or LOW.
Notes:
2. When using the AUTO SELECT command to enter auto select mode, applying VID to A9 is
not required. A9 can be either VIL or VIH.
3. Extended memory blocks are Micron-prelocked (permanent).
4. Extended memory blocks are customer-lockable.
5. Block protection status = protected: 01h (in x8 mode) is output on DQ[7:0].
6. Block protection status = unprotected: 00h (in x8 mode) is output on DQ[7:0].
PDF: 09005aef84bd3b68
m29w_256mb.pdf - Rev. C 7/13 EN
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