MX29LV065TC-12 MCNIX [Macronix International], MX29LV065TC-12 Datasheet - Page 16

• Manufacturer Part Number: MX29LV065TC-12
• Description: 64M-BIT [8M x 8] CMOS EQUAL SECTOR FLASH MEMORY
• Manufacturer: MCNIX [Macronix International]

VERIFY SECTOR GROUP PROTECT STATUS
OPERATION
MX29LV065 provides hardware method for sector group
protect status verify. Which method requires VID on A9
pin, VIH on WE and A1 pins, VIL on CE, OE, A6, and A0
pins, and sector address on A16 to A21 pins. Which the
identified sector is protected, the device will output 01H.
Which the identified sector is not protect, the device will
output 00H.
L=Logic Low=VIL,H=Logic High=VIH, SA=Sector Address, X=Don't care
P/N:PM0893
DATA PROTECTION
The MX29LV065 is designed to offer protection against
accidental erasure or programming caused by spurious
system level signals that may exist during power transi-
tion. During power up the device automatically resets
the state machine in the Read mode. In addition, with
its control register architecture, alteration of the memory
contents only occurs after successful completion of spe-
cific command sequences. The device also incorporates
several features to prevent inadvertent write cycles re-
sulting from VCC power-up and power-down transition or
system noise.
SECURED SILICON SECTOR
The MX29LV065 features a Flash memory region where
the system may access through a command sequence
to create a permanent part identification as so called
Electronic Serial Number (ESN) in the device. Once this
region is programmed, any further modification on the
region is impossible. The secured silicon sector is a 128
words in length, and uses a Secured Silicon Sector Indi-
cator Bit (Q7) to indicate whether or not the Secured
Silicon Sector is locked when shipped from the factory.
This bit is permanently set at the factory and cannot be
changed, which prevent duplication of a factory locked
part. This ensures the security of the ESN once the prod-
DESCRIPTION
Manufacturer ID:MXIC
Device ID:MX29LV065
Sector Protection
Verification
CE
L
L
L
OE
L
L
L
WE
H
H
H
X
A22
to
A16
X
SA
X
A15
to
A10
X
X
16
uct is shipped to the field.
The MX29LV065 offers the device with Secured Silicon
Sector either factory locked or customer lockable. The
factory-locked version is always protected when shipped
from the factory , and has the Secured Silicon Sector
Indicator Bit permanently set to a "1". The customer-
lockable version is shipped with the Secured Silicon
Sector unprotected, allowing customs to utilize that sec-
tor in any form they prefer. The customer-lockable ver-
sion has the secured sector Indicator Bit permanently
set to a "0". Therefore, the Secured Silicon Sector Indi-
cator Bit permanently set to a "0". Therefore, the Second
Silicon Sector Indicator Bit prevents customer, lockable
device from being used to replace devices that are fac-
tory locked.
The system access the Secured Silicon Sector through
a command sequence (refer to "Enter Secured Silicon/
Exit Secured Silicon Sector command Sequence). After
the system has written the Enter Secured Silicon Sector
command sequence, it may read the Secured Silicon
Sector by using the address normally occupied by the
first sector (SA0). This mode of operation continues until
the system issues the Exit Secured Silicon Sector com-
mand sequence, or until power is removed from the de-
vice. On power-up, or following a hardware reset, the
device reverts to sending command to sector SA0.
A9
VID X
VID X
VID X
A8
to
A7
A6
L
L
L
A5
X
X
X
MX29LV065
A1
L
L
H
L
A0 Q7 to Q0
H
L
C2H
93H
01h(protected)
00h(unprotected)
REV. 0.4, JUL. 22, 2003