M29W128GH70N6F NUMONYX, M29W128GH70N6F Datasheet - Page 50

• Manufacturer Part Number: M29W128GH70N6F
• Manufacturer: NUMONYX

Specifications of M29W128GH70N6F

• Cell Type: NOR
• Density: 128Mb
• Access Time (max): 70ns
• Interface Type: Parallel
• Address Bus: 24/23Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8/16Bit
• Number Of Words: 16M/8M
• Supply Current: 10mA
• Mounting: Surface Mount
• Pin Count: 56
• Lead Free Status / RoHS Status: Compliant

7
7.1
7.1.1
7.1.2
7.1.3
7.1.4
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Registers
The device feature two registers:
Lock register
The lock register is a 16-bit one-time programmable register. The bits in the lock register are
summarized in
See
to read and program the lock register.
Password protection mode lock bit (DQ2)
The password protection mode lock bit, DQ2, 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 V
Table 10
DQ15 to DQ3 reserved
They are ‘don’t care’.
Section 6.3.3: Lock register command set
A lock register that allows to configure the memory blocks and extended memory block
protection (see
A status register that provides information on the current or previous program or erase
operations.
and
ID
to A9 (see
Table
Table 18: Lock register
11).
Table 19: Block protection
Table 8
and
Table
bits.
9) or by issuing an Auto Select command (see
for a description of the commands allowing
status)