MX29F200BMI-70 View Datasheet(PDF) - Macronix International
Part Name
Description
MFG CO.
'MX29F200BMI-70' PDF : 46 Pages View PDF
MX29F200T/B
POWER SUPPLY DECOUPLING
In order to reduce power switching effect, each device
should have a 0.1uF ceramic capacitor connected
between its VCC and GND.
in the system by writing the Read Silicon ID command.
Performing a read operation with A1=VIH, it will produce
00H at data outputs(Q0-Q7) for an unprotected sector.
It is noted that all sectors are unprotected after the chip
unprotect algorithm is completed.
SECTOR PROTECTION WITH 12V SYSTEM
The MX29F200T/B features hardware sector protection.
This feature will disable both program and erase
operations for these sectors protected. To activate this
mode, the programming equipment must force VID on
address pin A9 and control pin OE, (suggest VID = 12V)
A6 = VIL and CE = VIL.(see Table 2) Programming of
the protection circuitry begins on the falling edge of the
WE pulse and is terminated on the rising edge. Please
refer to sector protect algorithm and waveform.
To verify programming of the protection circuitry, the
programming equipment must force VID on address pin
A9 ( with CE and OE at VIL and WE at VIH. When A1=1,
it will produce a logical "1" code at device output Q0 for
a protected sector. Otherwise the device will produce
00H for the unprotected sector. In this mode, the
addresses,except for A1, are in "don't care" state.
Address locations with A1 = VIL are reserved to read
manufacturer and device codes.(Read Silicon ID)
It is also possible to determine if the sector is protected
in the system by writing a Read Silicon ID command.
Performing a read operation with A1=VIH, it will produce
a logical "1" at Q0 for the protected sector.
CHIP UNPROTECT WITH 12V SYSTEM
The MX29F200T/B also features the chip unprotect
mode, so that all sectors are unprotected after chip
unprotect is completed to incorporate any changes in
the code. It is recommended to protect all sectors before
activating chip unprotect mode.
To activate this mode, the programming equipment
must force VID on control pin OE and address pin A9.
The CE pins must be set at VIL. Pins A6 must be set to
VIH.(see Table 2) Refer to chip unprotect algorithm and
waveform for the chip unprotect algorithm. The
unprotection mechanism begins on the falling edge of
the WE pulse and is terminated on the rising edge .
It is also possible to determine if the chip is unprotected
SECTOR PROTECTION WITHOUT 12V
SYSTEM
The MX29F200T/B also feature a hardware sector
protection method in a system without 12V power suppply.
The programming equipment do not need to supply 12
volts to protect sectors. The details are shown in sector
protect algorithm and waveform.
CHIP UNPROTECT WITHOUT 12V SYSTEM
The MX29F200T/B also feature a hardware chip
unprotection method in a system without 12V power
supply. The programming equipment do not need to
supply 12 volts to unprotect all sectors. The details are
shown in chip unprotect algorithm and waveform.
POWER-UP SEQUENCE
The MX29F200T/B powers up in the Read only mode. In
addition, the memory contents may only be altered after
successful completion of the predefined command
sequences.
P/N:PM0549
REV. 1.3 , DEC. 24, 2001
14
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