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參數(shù)資料
| 型號(hào)： | MX29L3211MC-10 |
| 廠商： | MACRONIX INTERNATIONAL CO LTD |
| 元件分類： | DRAM |
| 英文描述： | 32M-BIT [4M x 8/2M x 16] CMOS SINGLE VOLTAGE PAGEMODE FLASH EEPROM |
| 中文描述： | 2M X 16 FLASH 3.3V PROM, 100 ns, PDSO44 |
| 封裝： | 0.500 INCH, PLASTIC, MO-175, SOP-44 |
| 文件頁數(shù)： | 13/38頁 |
| 文件大?。?/td> | 659K |
| 代理商： | MX29L3211MC-10 |
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13
P/N:PM0641
REV. 0.3, NOV. 06, 2001
MX29L3211
SECTOR UNPROTECT
It is also possible to unprotect the sector , same as the
first five write command cycles in activating sector
protection mode followed by the Unprotect Sector
command -40H, the automatic Unprotect operation
begins on the rising edge of the last WE pulse in the
command sequence and terminates when the Status on
Q7 is '1' at which time the device stays at the read status
register mode. (Refer to table 3,6 and Figure 11,12)
The device remains enabled for read status register
mode until the CIR contents are altered by a valid
command sequence.
ABORT MODE
To activate Abort mode, a three-bus cycle operation is
required. The E0H command (Refer to table 3) only
stops Page program or Sector /Chip erase operation
currently in progress and puts the device in Abort mode.
So the program or erase operation will not be completed.
Since the data in some page/sectors is no longer valid
due to an incomplete program or erase operation, the
program fail (Q4) or erase fail (Q5)bit will be set.
A read array command MUST be written to bring the
device out of the abort state without incurring any wake
up latency. Note that once device is brought out, Clear
status register mode is required before a program or
erase operation can be executed.
SECTOR PROTECTION
The MX29L3211 features sector protection. This feature
will disable both program and erase operations in either
the top or the bottom sector (0 or 31). The sector
protection feature is enabled using system software by
the user(Refer to table 3). The device is shipped with
both sectors unprotected. Alternatively, MXIC may
protect sectors in the factory prior to shipping the device.
To activate this mode, a six-bus cycle operation is
required. There are two 'unlock' write cycles. These are
followed by writing the 'set-up' command. Two more
'unlock' write cycles are then followed by the Lock Sector
command - 20H. Sector address is latched on the falling
edge of CE or WE of the sixth cycle of the command
sequence. The automatic Lock operation begins on the
rising edge of the ast WE pulse n the command sequence
and terminates when the Status on Q7 is 1' at which time
the device stays at the read status register mode.
The device remains enabled for read status register
mode until the CIR contents are altered by a valid
command sequence (Refer to table 3,6 and Figure
10,12 ).
VERIFY SECTOR PROTECT
To verify the Protect status of the Top and the Bottom
sector, operation is initiated by writing Silicon ID read
command into the command register. Following the
command write, a read cycle from address XXX0H
retrieves the Manufacturer code of C2H. A read cycle
from XXX1H returns the Device code F9H. A read cycle
from appropriate address returns information as to which
sectors are protected. To terminate the operation, it is
necessary to write the read/reset command sequence
into the CIR.
(Refer to table 3,4 and Figure 12)
A few retries are required if Protect status can not be
verified successfully after each operation.
DATA PROTECTION
The MX29L3211 is designed to offer protection against
accidental erasure or programming caused by spurious
system level signals that may exist during power
transitions. During power up the device automatically
resets the internal state machine in the Read Array mode.
Also, with its control register architecture, alteration of the
memory contents only occurs after successful completion
of specific multi-bus cycle command sequences.
The device also incorporates several features to prevent
inadvertent write cycles resulting from VCC power-up
and power-down transitions or system noise.
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| MX29LV040CQC-90G | 制造商:MISCELLANEOUS 功能描述: 制造商:Macronix International Co Ltd 功能描述:IC FLASH 4MBIT 90NS 32PLCC 制造商:Macronix International Co Ltd 功能描述:MX29LV Series 3 V 4 Mb (512K x 8) 90 ns Parallel Flash - PLCC-32 |
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