M29DW128G70NF6E NUMONYX, M29DW128G70NF6E Datasheet - Page 18

• Manufacturer Part Number: M29DW128G70NF6E
• Description: P7ED TSOP56 DUAL BANK
• Manufacturer: NUMONYX

Auto select mode
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4.0.1
4.0.2
4.0.3
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Auto select mode
The auto select mode allows the system or the programming equipment to read the
electronic signature, verify the protection status of the extended memory block, and
apply/remove block protection. For example, this mode can be used by a programming
equipment to automatically match a device and the application code to be programmed.
The auto select mode is entered by issuing the Auto Select command (see
Auto Select
At power-up, the device is in read mode, and can then be put in auto select mode by issuing
the Auto Select command.
The device cannot enter auto select mode when a program or erase operation is ongoing
(RB Low). However, auto select mode can be entered if the erase operation has been
suspended by issuing an Erase Suspend command (see
The auto select mode is exited by performing a reset. The device is returned to read mode,
except if the auto select mode was entered after an Erase Suspend or a Program Suspend
command. In this case, it returns to the erase or program suspend mode.
Read electronic signature
The memory has two codes, the manufacturer code and the device code used to identify the
memory. These codes can be accessed by performing read operations with control signals
and addresses set as shown in
signature.
Verify extended memory block protection indicator
The extended memory block is either factory locked or customer lockable.
The protection status of the extended memory block (factory locked or customer lockable)
can be accessed by reading the extended memory block protection indicator (see
Block
The protection status of the extended memory block is then output on bit DQ7 of the data
input/outputs (see
Verify block protection status
The protection status of a block can be directly accessed by performing a read operation
with control signals and addresses set as shown in
If the block is protected, then 01h is output on data input/outputs DQ0-DQ7, otherwise 00h
is output.
protection).
command).
Table 4: Bus
Table 6: Block protection
operations).
Table 6: Block
and
Section
Table 5: Read electronic
7.1.6).
protection.
Section 7.1.2:
M29DW128G
Table 6: