參數(shù)資料
型號(hào)： MX29F1611
廠(chǎng)商： Electronic Theatre Controls, Inc.
英文描述： 16M-BIT [2M x 8/1M x 16] CMOS SINGLE VOLTAGE PAGEMODE FLASH EEPROM
中文描述： 1,600位[2米x 8/1M × 16] CMOS單電壓閃存EEPROM PAGEMODE
文件頁(yè)數(shù)： 13/36頁(yè)
文件大?。?/td> 171K
代理商： MX29F1611
13
P/N: PM0440
REV. 1.6, JUL. 16, 1998
MX29F1611
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 DQ7 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.
Either Protect or Unprotect sector mode is accomplished
by keeping WP high, i.e. protect-bit status can only be
changed with a valid command sequence and WP at high.
When WP is high, all sectors can be programmed or
erased regardless of the state of the protect-bits. Protect-
bit status will not be changed during chip/sector erase
operations. With WP at VIL, only unprotected sectors
can be programmed or erased.
HARDWARE SECTOR PROTECTION
The MX29F1611 features sector protection. This feature
will disable both program and erase operations in either
the top or the bottom sector (0 or 15). 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.
SECTOR PROTECTION
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 last WE pulse in the command
sequence and terminates when the Status on DQ7 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 F7H. 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.
SECTOR UNPROTECT
It is also possible to unprotect the sector , same as the first
SLEEP MODE
The MX29F1611 features two software controlled low-
power modes : Sleep and Abort modes. Sleep mode is
allowed during any current operations except that once
Suspend command is issued, Sleep command is ignored.
Abort mode is excuted only during Page Program and
Chip/Sector Erase mode.
To activate Sleep mode, a three-bus cycle operation is
required. The C0H command (Refer to table 3) puts the
device in the Sleep mode. Once in the Sleep mode and
with CMOS input level applied, the current of the device
is 100uA.
The Sleep command allows the device to COMPLETE
current operations before going into Sleep mode. Once
current operation is done, device stays at read status
register mode. The status registers are not reset during
sleep command. Program or erase fail bit may have been
set if during program/erase mode the device retry
exceeds maximum count.
During Sleep mode, the status registers, Silicon ID codes
remain valid and can still be read. The Device Sleep
Status bit - DQ2 will indicate that the device in the sleep
mode.
Writing the Read Array command wakes up the device
out of sleep mode. DQ2 is reset to "0" and Device returns
to standby current level.
INDEX
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