S29GL128S10DHIV10 Datasheet, PDF (17/106 Pages) SPANSION – GL-S MirrorBit® Eclipse™ Flash Non-Volatile Memory Family

Data Sheet
2.6 Sector Protection Control
2.6.1
Lock Register ASO
The Lock register ASO contains a single word of OTP memory. When the ASO is entered the Lock Register
appears at all word locations in the device address space. However, it is recommended to read or program
the Lock Register only at location 0 of the device address space for future compatibility.
2.6.2
Persistent Protection Bits (PPB) ASO
The PPB ASO contains one bit of a Flash Memory Array for each Sector in the device. When the PPB ASO is
entered, the PPB bit for a sector appears in the Least Significant Bit (LSB) of each address in the sector.
Reading any address in a sector displays data where the LSB indicates the non-volatile protection status for
that sector. However, it is recommended to read or program the PPB only at address 0 of the sector for future
compatibility. If the bit is 0 the sector is protected against programming and erase operations. If the bit is 1 the
sector is not protected by the PPB. The sector may be protected by other features of ASP.
2.6.3
2.6.4
PPB LOCK ASO
The PPB Lock ASO contains a single bit of volatile memory. The bit controls whether the bits in the PPB ASO
may be programmed or erased. If the bit is 0 the PPB ASO is protected against programming and erase
operations. If the bit is 1 the PPB ASO is not protected. When the PPB Lock ASO is entered the PPB Lock bit
appears in the Least Significant Bit (LSB) of each address in the device address space. However, it is
recommended to read or program the PPB Lock only at address 0 of the device for future compatibility.
Password ASO
The Password ASO contains four words of OTP memory. When the ASO is entered the Password appears
starting at address 0 in the device address space. All locations above the forth word are undefined.
2.6.5
Dynamic Protection Bits (DYB) ASO
The DYB ASO contains one bit of a volatile memory array for each Sector in the device. When the DYB ASO
is entered, the DYB bit for a sector appears in the Least Significant Bit (LSB) of each address in the sector.
Reading any address in a sector displays data where the LSB indicates the non-volatile protection status for
that sector. However, it is recommended to read, set, or clear the DYB only at address 0 of the sector for
future compatibility. If the bit is 0 the sector is protected against programming and erase operations. If the bit
is 1 the sector is not protected by the DYB. The sector may be protected by other features of ASP.
October 9, 2013 S29GL_128S_01GS_00_08
GL-S MirrorBit^® Family
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