M29DW128F60NF1F NUMONYX [Numonyx B.V], M29DW128F60NF1F Datasheet - Page 15
M29DW128F60NF1F
Manufacturer Part Number
M29DW128F60NF1F
Description
128 Mbit (16Mb x8 or 8Mb x16, Multiple Bank, Page, Boot Block) 3V supply Flash memory
Manufacturer
NUMONYX [Numonyx B.V]
Datasheet
1.M29DW128F60NF1F.pdf
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M29DW128F
2.7
2.8
Write Enable (W)
The Write Enable pin, W, controls the Bus Write operation of the memory’s Command
Interface.
V
The V
use an external high voltage power supply to reduce the time required for Program
operations. This is achieved by bypassing the unlock cycles and/or using the multiple Word
(2 or 4 at-a-time) or multiple byte Program (2, 4 or 8 at-a-time) commands.
The Write Protect function provides a hardware method of protecting the four outermost
boot blocks (two at the top, and two at the bottom of the address space). When V
Protect is Low, V
operations in these blocks are ignored while V
V
When V
of the four outermost boot blocks. Program and Erase operations can now modify the data
in these blocks unless the blocks are protected using Block Protection.
Applying V
(including the four outermost parameter blocks) using a High Voltage Block Protection
technique (In-System or Programmer technique). See
details.
When V
Bypass mode. When V
During Unlock Bypass Program operations the memory draws I
programming circuits. See the description of the Unlock Bypass command in the Command
Interface section. The transitions from V
t
Never raise V
memory may be left in an indeterminate state.
The V
become unreliable. A 0.1µF capacitor should be connected between the V
pin and the V
track widths must be sufficient to carry the currents required during Unlock Bypass Program,
I
VHVPP
PP
ID
PP/
.
.
PP
PP
Write Protect (V
, see
PP
PP
/Write Protect pin provides two functions. The V
/Write Protect pin must not be left floating or unconnected or the device may
/Write Protect is High, V
/Write Protect is raised to V
PPH
Figure 20
SS
PP
to the V
/Write Protect to V
Ground pin to decouple the current surges from the power supply. The PCB
IL
, the memory protects the four outermost boot blocks; Program and Erase
.
PP
PP
/WP pin will temporarily unprotect any block previously protected
/Write Protect returns to V
PP
/WP)
PP
IH
, the memory reverts to the previous protection status
from any mode except Read mode, otherwise the
PP
IH
the memory automatically enters the Unlock
to V
PP
PP
/Write Protect is Low, even when RP is at
and from V
IH
or V
Table 9: Hardware Protection
PP
IL
function allows the memory to
normal operation resumes.
PP
PP
to V
from the pin to supply the
IH
must be slower than
Signal descriptions
PP
/Write Protect
PP
/Write
for
15/94
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