M29W320ET70N6 Micron Technology Inc, M29W320ET70N6 Datasheet - Page 15

• Manufacturer Part Number: M29W320ET70N6
• Manufacturer: Micron Technology Inc

Specifications of M29W320ET70N6

• Cell Type: NOR
• Density: 32Mb
• Access Time (max): 70ns
• Interface Type: Parallel
• Boot Type: Top
• Address Bus: 22/21Bit
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Program/erase Volt (typ): 2.7 to 3.6/12V
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 8/16Bit
• Number Of Words: 4M/2M
• Supply Current: 10mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Not Compliant

2.7
2.8
2.9
Write Enable (W)
The Write Enable, 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 Double word
or Quadruple byte Program commands.
The Write Protect function provides a hardware method of protecting the two outermost boot
blocks. When V
blocks; Program and Erase operations in these blocks are ignored while V
is Low, even when RP is at V
When V
of the two outermost boot blocks. Program and Erase operations can now modify the data
in these blocks unless the blocks are protected using Block Protection.
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
Reset/Block Temporary Unprotect (RP)
The Reset/Block Temporary Unprotect pin can be used to apply a Hardware Reset to the
memory or to temporarily unprotect all Blocks that have been protected.
Note that if V
if RP is at V
A Hardware Reset is achieved by holding Reset/Block Temporary Unprotect Low, V
least t
ready for Bus Read and Bus Write operations after t
See the Ready/Busy Output section,
Unprotect ac
Holding RP at V
and Erase operations on all blocks will be possible. The transition from V
slower than t
VHVPP
PP
PP/
.
PP
PP
PLPX
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
. After Reset/Block Temporary Unprotect goes High, V
ID
Figure 17
PHPHH
PP
SS
waveforms, for more details.
PP
.
/WP is at V
PP
ID
/Write Protect to V
Ground pin to decouple the current surges from the power supply. The PCB
/Write Protect is Low, V
will temporarily unprotect the protected Blocks in the memory. Program
.
PP
/Write Protect returns to V
IL
, then the two outermost boot blocks will remain protected even
ID
PP
.
/WP)
PP
IH
, the memory reverts to the previous protection status
Table 16
from any mode except Read mode, otherwise the
PP
IH
the memory automatically enters the Unlock
IL
to V
, the memory protects the two outermost boot
and
PP
and from V
Figure 16: Reset/Block Temporary
IH
PHEL
or V
PP
or t
IL
function allows the memory to
normal operation resumes.
PP
RHEL
PP
to V
IH
, whichever occurs last.
from the pin to supply the
, the memory will be
IH
must be slower than
IH
PP
PP
to V
/Write Protect
/Write Protect
ID
must be
IL
, for at
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