S70GL01GN00 Datasheet, PDF (51/83 Pages) SPANSION – 3.0 Volt-only Page Mode Flash Memory featuring 110 nm MirrorBit™ Process Technology

Advance Information
a sector is actively erasing or is erase-suspended. Refer to the Write Operation
Status section for information on these status bits.
After an erase-suspended program operation is complete, the device returns to
the erase-suspend-read mode. The system can determine the status of the pro-
gram operation using the DQ7 or DQ6 status bits, just as in the standard word
program operation. Refer to Write Operation Status‚ on page 60 for more
information.
In the erase-suspend-read mode, the system can also issue the autoselect com-
mand sequence. Refer to the Autoselect Mode‚ on page 28 section and
Autoselect Command Sequence‚ on page 40 for details.
To resume the sector erase operation, the system must write the Erase Resume
command. The address of the erase-suspended sector is required when writing
this command. Further writes of the Resume command are ignored. Another
Erase Suspend command can be written after the chip resumes erasing. It is im-
portant to allow an interval of at least 5 ms between Erase Resume and Erase
Suspend.
Lock Register Command Set Definitions
The Lock Register Command Set permits the user to one-time program the Se-
cured Silicon Sector Protection Bit, Persistent Protection Mode Lock Bit, and
Password Protection Mode Lock Bit. The Lock Register bits are all readable after
an initial access delay.
The Lock Register Command Set Entry command sequence must be issued
prior to any of the following commands listed, to enable proper command
execution.
Note that issuing the Lock Register Command Set Entry command disables
reads and writes for the flash memory.
„ Lock Register Program Command
„ Lock Register Read Command
The Lock Register Command Set Exit command must be issued after the ex-
ecution of the commands to reset the device to read mode. Otherwise the device
hangs. If this happens, the flash device must be reset. Please refer to RESET#
for more information. It is important to note that the device is in either Persistent
Protection mode or Password Protection mode depending on the mode selected
prior to the device hang.
For either the Secured Silicon Sector to be locked, or the device to be perma-
nently set to the Persistent Protection Mode or the Password Protection Mode, the
associated Lock Register bits must be programmed. Note that the Persistent Pro-
tection Mode Lock Bit and Password Protection Mode Lock Bit can never be
programmed together at the same time. If so, the Lock Register Program opera-
tion aborts.
The Lock Register Command Set Exit command must be initiated to re-enable
reads and writes to the main memory.
Password Protection Command Set Definitions
The Password Protection Command Set permits the user to program the 64-bit
password, verify the programming of the 64-bit password, and then later unlock
the device by issuing the valid 64-bit password.
June 1, 2005 S70GL01GN00_00_A1
S70GL01GN00 MirrorBit^TM Flash
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