MBM29LV320TE80TN Meet Spansion Inc., MBM29LV320TE80TN Datasheet - Page 28

• Manufacturer Part Number: MBM29LV320TE80TN
• Description: Flash Memory Cmos 32 M 4 M ? 8/2 M ? 16 Bit
• Manufacturer: Meet Spansion Inc.

28
MBM29LV320TE/BE
10. RESET
Hardware Reset
11. Boot Block Sector Protection
12. Accelerated Program Operation
In addition to normal sector group protection, the device has Extended Sector Group Protection as extended
function. This function enables to protect sector group by forcing V
sequence. Unlike conventional procedure, it is not necessary to force V
extended sector group protection requires V
by writing the set-up command (60h) into the command register. Then, the sector group addresses pins (A
A
(recommend to set V
A sector group is typically protected in 250 μs. To verify programming of the protection circuitry, the sector group
addresses pins (A
a command (40h). Following the command write, a logic “1” at device output DQ
sector in the read operation. If the output is logic “0”, please repeat to write extended sector group protection
command (60h) again. To terminate the operation, it is necessary to set RESET pin to V
Sector Group Protection Timing Diagram” in ■TIMING DIAGRAM and “7. Extended Sector Group Protection
Algorithm” in ■FLOW CHART.)
The device resets by driving RESET pin to V
(V
executed is terminated and the internal state machine is reset to the read mode “t
driven low. Furthermore once the RESET pin goes high, the device requires an additional “t
read access. When the RESET pin is low, the device is in the standby mode for the duration of the pulse and
all the data output pins are tri-stated. If a hardware reset occurs during program or erase operation, the data at
that particular location will be corrupted. Please note that the RY/BY output signal should be ignored during the
RESET pulse. See “10. RESET, RY/BY Timing Diagram” in ■TIMING DIAGRAM for the timing diagram. See “8.
Temporary Sector Group Unprotection” for additional functionality.
The Write Protection function provides hardware method of protecting certain boot sectors without using V
This function is provided by the WP/ACC pin.
If the system asserts V
“outermost” 8 K byte boot sectors (MBM29LV320TE : SA69 and SA70, MBM29LV320BE : SA0 and SA1)
independently of whether those sectors are protected or unprotected using the method described in “Sector
Group Protection”. The two outermost 8 K byte boot sectors are the two sectors containing the lowest addresses
in a bottom-boot-configured device, or the two sectors containing the highest addresses in a top-boot-configured
device.
If the system asserts V
sectors were last set to be protected or unprotected. That is, sector group protection or unprotection for these
two sectors depends on whether they were last protected or unprotected using the method described in “Sector
Group Protection”.
The device offers accelerated program operation which enables the programming in high speed. If the system
asserts V
for program operation will reduce to about 60%. This function is primarily intended to allow high speed program,
so caution is needed as the sector group becomes temporarily unprotected.
The system uses fast program command sequence when programming during acceleration mode. Set command
to fast mode and reset command from fast mode are not necessary. When the device enters the acceleration
mode, the device automatically set to fast mode. Therefore the present sequence is used for programming and
detection of completion during acceleration mode.
Removing V
ACC pin while programming. See “17. Accelerated Program Timing Diagram” in ■TIMING DIAGRAM.
Erase operation during Accelerated Program Operation is strictly prohibited.
19
IL
, A
) for at least “t
18
, A
ACC
17
, A
ACC
to the WP/ACC pin, the device automatically enters the acceleration mode and the time required
16
, A
from the WP/ACC pin returns the device to normal operation. Do not remove V
15
RP
20
, A
, A
” in order to properly reset internal state machine. Any operation in the process of being
IL
for the other addresses pins), and write extended sector group protection command (60h).
14
19
IH
, A
, A
IL
on the WP/ACC pin, the device reverts to whether the two outermost 8 K byte boot
13
on the WP/ACC pin, the device disables program and erase functions in the two
18
and A
, A
17
, A
12
16
) and (A
, A
Retired Product DS05-20894-5E_July 31, 2007
15
80/90/10
, A
6
14
ID
, A
IL
, A
on RESET pin only. With this condition, the operation is initiated
. The RESET pin has pulse requirement and has to be kept low
1
, A
13
0
and A
) = (0, 1, 0) should be set to the sector group to be protected
12
) and (A
6
, A
ID
1
ID
, A
on RESET pin and write a command
and control timing for control pins. The
0
) = (0, 1, 0) should be set and write
READY
0
will produce for protected
” after the RESET pin is
IH
. (See “16. Extended
RH
” before it allows
ACC
from WP/
20
ID
,
.