M29W128GH60N1F View Datasheet(PDF) - Numonyx -> Micron
Part Name
Description
MFG CO.
M29W128GH60N1F
Numonyx -> Micron
'M29W128GH60N1F' PDF : 94 Pages View PDF
M29W128GH, M29W128GL
7
Registers
Registers
The device feature two registers:
● A Lock Register that allows to configure the memory blocks and extended memory
block protection (see Table 19: Block protection status)
● A Status Register that provides information on the current or previous Program or
Erase operations.
7.1
7.1.1
7.1.2
7.1.3
7.1.4
Lock Register
The Lock Register is a 16-bit one-time programmable register. The bits in the Lock Register
are summarized in Table 18: Lock Register bits.
See Section 6.3.3: Lock Register command set for a description of the commands allowing
to read and program the Lock Register.
Password Protection Mode Lock bit (DQ2)
The Password Protection Mode Lock bit, DQ0, is one-time programmable. Programming
(setting to ‘0’) this bit permanently places the device in Password Protection mode.
Any attempt to program the Password Protection mode Lock bit when the Non-volatile
Protection Mode bit is programmed causes the operation to abort and the device to return to
Read mode.
Non-volatile Protection Mode Lock bit (DQ1)
The Non-volatile Protection Mode Lock bit, DQ1, is one-time programmable. Programming
(setting to ‘0’) this bit permanently places the device in Non-volatile Protection mode.
When shipped from the factory, all parts default to operate in Non-volatile Protection mode.
The memory blocks can be either unprotected (NVPBs set to ‘1’) or protected (NVPBs set to
‘0’), according to the ordering option that has been chosen.
Any attempt to program the Non-volatile Protection mode Lock bit when the Password
Protection Mode bit is programmed causes the operation to abort and the device to return to
Read mode.
Extended Block Protection bit (DQ0)
If the device has not been shipped with the extended memory block factory locked, the block
can be protected by setting the Extended Memory Block Protection bit, DQ0, to ‘0’.
However, this bit is one-time programmable and once protected the extended memory block
cannot be unprotected.
The extended memory block protection status can be read in Auto Select mode either by
applying VID to A9 (see Table 8 and Table 9) or by issuing an Auto Select command (see
Table 10 and Table 11).
DQ15 to DQ3 reserved
They are ‘Don’t care’.
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