MBM29SL160TD Fujitsu Microelectronics, Inc., MBM29SL160TD Datasheet - Page 16

• Manufacturer Part Number: MBM29SL160TD
• Description: Flash Memory 16m 2m X 8/1m X 16 Bit
• Manufacturer: Fujitsu Microelectronics, Inc.

16
MBM29SL160TD
RESET
Hardware Reset
Boot Block Sector Protection
Accelerated Program Operation
The MBM29SL160TD/BD devices may be reset by driving the RESET pin to V
requirement and has to be kept low (V
Any operation in the process of being executed will be terminated and the internal state machine will be reset
to the read mode “t
devices require an additional “t
be in the standby mode for the duration of the pulse and all the data output pins will be tri-stated. If a hardware
reset occurs during a 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 Figure 12 for the timing
diagram. Refer to Temporary Sector Group Unprotection for additional functionality.
The Write Protection function provides a hardware method of protecting certain boot sectors without using V
This function is one of two provided by the WP/ACC pin.
If the system asserts V
“outermost” 8K byte boot sectors independently of whether those sectors were protected or unprotected using
the method described in “Sector Protection/Unprotection”. The two outermost 8K 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-congfigured device.
(MBM29SL160TD: SA37 and SA38, MBM29SL160BD: SA0 and SA1)
If the system asserts V
sectors were last set to be protected or unprotected. That is, sector protection or unprotection for these two
sectors depends on whether they were last protected or unprotected using the method described in “Sector
protection/unprotection”.
The device offers accelerated program operations through the ACC function. This is one of two functions provided
by the WP/ACC pin. This function is primarily intended to allow faster factory throughput by 50 percent.
If the system asserts V
unprotects any protected sectors, and uses the higher voltage on the pin to reduce the time required for program
operations. The system would use a two-cycle program command sequence as required by the Fast mode.
Removing V
If you use this function, please contact a Fujitsu representative for more information.
HH
from the WP/ACC pin returns the device to normal operation.
READY
HH
IL
IH
” after the RESET pin is driven low. Furthermore, once the RESET pin goes high, the
on the WP/ACC pin, the device disables program and erase functions in the two
on this pin, the device automatically enters the after mentioned Fast mode, temporarily
on the WP/ACC pin, the device reverts to whether the two outermost 8K byte boot
-10/-12
RH
” before it will allow read access. When the RESET pin is low, the devices will
/MBM29SL160BD
IL
) for at least “t
RP
” in order to properly reset the internal state machine.
-10/-12
IL
. The RESET pin has a pulse
ID
.