m29dw128f-70za6t Numonyx, m29dw128f-70za6t Datasheet - Page 19

• Manufacturer Part Number: m29dw128f-70za6t
• Description: 128 Mbit 16mb X8 Or 8mb X16, Multiple Bank, Page, Boot Block 3v Supply Flash Memory
• Manufacturer: Numonyx

M29DW128F
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 and 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
issuing an Auto Select command (see
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 performed by applying the signals as shown in
Status of the Extended Block is then output on bits DQ7 and DQ6 of the Data Input/Outputs.
(see
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
protected, then 01h (in x8 mode) is output on Data Input/Outputs DQ0-DQ7, otherwise 00h
is output.
Hardware Block Protect
The V
is at V
of the Block Protection Status or the Reset/Block Temporary Unprotect pin state.
Table 3
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
and
Table 6
CC
± 0.2V) are used to drive the bus and the bus is inactive for 300ns or
Section 6.1.2: Auto Select command
, Bus Operations).
CC2
Table 4
. The Data Inputs/Outputs will still output data if a Bus
Section 6.1.2: Auto Select command
and
Table 6
. These codes can also be accessed by
Table 5
Table 5
ID
to be applied to some pins.
).
and
and
Table 8
Table 8
. If the Block is
. The Protection
Bus operations
).
PP
19/94
/WP