MX29LV400T/B
COMMAND DEFINITIONS
sequences. Note that the Erase Suspend (B0H) and
Erase Resume (30H) commands are valid only while the
Sector Erase operation is in progress.
Device operations are selected by writing specific ad-
dress and data sequences into the command register.
Writing incorrect address and data values or writing them
in the improper sequence will reset the device to the
read mode. Table 4 defines the valid register command
TABLE 5. MX29LV400T/B BUS OPERATION
ADDRESS
OE WE RESET A17 A10 A9 A8 A6 A5 A1 A0
Q8~Q15
DESCRIPTION
Read
CE
L
Q0~Q7
Dout
BYTE
=VIH
BYTE
=VIL
A11
A7
A2
L
H
L
H
H
AIN
Dout Q8~Q14=High Z
Q15=A-1
Write
L
H
AIN
DIN(3)
DIN Q8~Q14=High Z
Q15=A-1
Reset
X
X
X
X
H
X
X
X
H
X
L
VID
H
X
AIN
X
High Z
DIN
High Z
DIN
High Z
High Z
High Z
High Z
Temproary sector unlock
Output Disable
Standby
L
High Z
High Z
High Z
High Z
Vcc±
0.3V
L
Vcc±
0.3V
VID
VID
H
X
Sector Protect
H
H
L
L
L
SA
X
X
X
X
X
X
X
X
X
L
H
L
X
X
X
H
H
H
L
L
L
DIN
DIN
X
X
X
X
X
X
Chip Unprotect
L
Sector Protection Verify
L
H
SA
VID
CODE(5)
NOTES:
1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 4.
2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V.
3. Refer to Table 4 for valid Data-In during a write operation.
4. X can be VIL or VIH.
5. Code=00H/XX00H means unprotected.
Code=01H/XX01H means protected.
6. A17~A12=Sector address for sector protect.
7. The sector protect and chip unprotect functions may also be implemented via programming equipment.
P/N:PM0710
REV. 1.4, NOV. 23, 2001
8
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