MX29LV800AB Macronix, MX29LV800AB Datasheet - Page 20

• Manufacturer Part Number: MX29LV800AB
• Description: 8M-BIT [1Mx8/512K x16] CMOS SINGLE VOLTAGE 3V ONLY FLASH MEMORY
• Manufacturer: Macronix

MX29LV800T/B & MX29LV800AT/AB
CHIP UNPROTECTED
The MX29LV800T/B & MX29LV800AT/AB also features
the chip unprotected mode, so that all sectors are un-
protected after chip unprotected is completed to incor-
porate any changes in the code. It is recommended to
protect all sectors before activating chip unprotected
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.
Refer to chip unprotected algorithm and waveform for
the chip unprotected algorithm. The unprotection mecha-
nism 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
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
unprotected algorithm is completed.
P/N:PM0709
REV. 2.5, DEC. 23, 2003
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