MBM29DS163TE Fujitsu Media Devices, MBM29DS163TE Datasheet - Page 24

• Manufacturer Part Number: MBM29DS163TE
• Description: (MBM29DS163BE/TE) FLASH MEMORY CMOS 16 M (2 M X 8/1 M X 16) BIT
• Manufacturer: Fujitsu Media Devices

24
MBM29DS163TE/BE
RESET
Hardware Reset
Boot Block Sector Protection
Accelerated Program Operation
The device may be reset by driving the RESET pin to V
be kept low (V
of being executed will be terminated and the internal state machine will be reset to the read mode “t
the RESET pin is driven low. Furthermore, once the RESET pin goes high, the device requires an additional
“t
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 “RESET, RY/BY Timing Diagram” in “
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” 8 K byte boot sectors independently of whether those sectors are protected or unprotected using
the method described in “Sector Protection/Unprotection”. 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-congfigured device.
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 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 will temporarily be unprotected.
The system would use a 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,
used for programming and detection of completion during acceleration mode.
Removing V
ACC pin while programming. See “Accelerated Program Timing Diagram” in “ TIMING DIAGRAM”.
(MBM29DS163TE : SA37 and SA38, MBM29DS163BE : SA0 and SA1)
RH
” before it will allow read access. When the RESET pin is low, the device will be in the standby mode for the
ACC
ACC
to the WP/ACC pin, the device automatically enters the acceleration mode and the time required
IL
) for at least “t
from the WP/ACC pin returns the device to normal operation. Do not remove V
the device automatically set to fast mode. Therefore, the pressent sequence could be
IH
IL
on the WP/ACC pin, the device reverts to whether the two outermost 8 K byte boot
on the WP/ACC pin, the device disables program and erase functions in the two
RP
” in order to properly reset the internal state machine. Any operation in the process
10
IL
. The RESET pin has a pulse requirement and has to
TIMING DIAGRAM”
ACC
READY
from WP/
” after
ID
.