M29DW641F70N1 NUMONYX [Numonyx B.V], M29DW641F70N1 Datasheet - Page 17

• Manufacturer Part Number: M29DW641F70N1
• Description: 64 Mbit (4Mb x16, Multiple Bank, Page, Boot Block) 3V Supply Flash Memory
• Manufacturer: NUMONYX [Numonyx B.V]

M29DW641F
3.5
3.6
3.6.1
3.6.2
3.6.3
3.6.4
Automatic Standby
If CMOS levels (V
more the memory enters Automatic Standby where the internal Supply current is reduced to
the Standby Supply current, I
Read Operation is in progress.
Special Bus Operations
Additional Bus Operations can be performed to read the Electronic Signature, verify the
Protection status of the Extended Memory Block (second section), and apply or remove
Block Protection. These Bus Operations are intended for use by programming equipment
and are not usually used in applications. They require V
Read Electronic Signature
The memory has two codes, the Manufacturer code and the Device code used to identify
the memory. These codes can accessed by performing Read Operations with control
signals and addresses set as shown in
These codes can also be accessed by issuing an Auto Select command (see
Command interface
Verify Extended Block Protection indicator
The Extended Block is divided in two sections of which one is Factory Locked and the
second one is either Customer Lockable or Customer Locked.
The Protection status of the second section of the Extended Block (Customer Lockable or
Customer Locked) can be accessed by reading the Extended Block Protection indicator.
This is done by applying the signals listed in
of the Extended Block is then output on bits DQ7 and DQ6 of the Data Input/Outputs. (see
Table 3: Bus Operations
The Protection status of the Extended Block can also be accessed by issuing an Auto Select
command (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 0001h is output on Data Input/Outputs, otherwise 0000h is
output.
Hardware Block Protect
The V
is at V
of the Block Protection status or the Reset/Block Temporary Unprotect pin state.
PP
IL
the four outermost parameter blocks are protected and remain protected regardless
/WP pin can be used to protect the four outermost parameter blocks. When V
Section 6: Command interface
CC
,
Section 6.1.2: Auto Select command
± 0.2V) are used to drive the bus and the bus is inactive for 300ns or
).
CC2
. The Data Inputs/Outputs will still output data if a Bus
Table 3: Bus Operations
Table 5: Block Protection
,
Section 6.1.2: Auto Select command
Table 5: Block Protection
ID
).
to be applied to some pins.
.
. The Protection status
Bus Operations
.
Section 6:
).
PP
17/80
/WP