M29DW128G70NF6E NUMONYX, M29DW128G70NF6E Datasheet - Page 20

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

Hardware protection
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5.1
6
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Hardware protection
The M29DW128G features hardware protection/unprotection. Refer to
protection
Write protect
The V
Section 2: Signal descriptions
V
the block protection status or the reset pin state.
Table 7.
Software protection
The M29DW128G has three different software protection modes:
On first use all parts default to operate in non-volatile protection mode and the customer is
free to activate the non-volatile or the password protection mode.
The desired protection mode is activated by setting either the one-time programmable non-
volatile protection mode lock bit or the password protection mode lock bit of the lock register
(see
the password protection mode lock bit to ‘0’ will permanently activate the non-volatile or the
password protection mode, respectively. These three bits are one-time programmable and
non-volatile: once the protection mode has been programmed, it cannot be changed and the
device will permanently operate in the selected protection mode. It is recommended to
activate the desired software protection mode when first programming the device.
The non-volatile and password protection modes provide non-volatile protection. Volatilely
protected blocks and non-volatilely protected blocks can co-exist within the memory array.
However, the volatile protection only control the protection scheme for blocks that are not
protected using the non-volatile or password protection.
IL
the four outermost parameter blocks are protected and remain protected regardless of
Volatile protection
Non-volatile protection
Password protection
Section 8.1: Lock
PP
V
PP
V
/WP pin can be used to protect the four outermost parameter blocks (refer to
V
V
PPH
/WP
IH
for details on hardware block protection/unprotection using V
IL
Hardware protection
4 outermost parameter blocks (first two and last two) protected from
program/erase operations
4 outermost parameter blocks unprotected unless a software activated (see
Section 5: Hardware
Unlock bypass mode. It supplies the current needed to speed up
programming
register). Programming the non-volatile protection mode lock bit or
for a detailed description of the signals). When V
protection)
Function
Table 7: Hardware
PP
/WP and RP pins.
M29DW128G
PP
/WP is at