MBM29PL65LM Fujitsu Media Devices, MBM29PL65LM Datasheet - Page 17

• Manufacturer Part Number: MBM29PL65LM
• Description: FLASH MEMORY CMOS 64 M (4M X 16) BIT MirrorFlashTM
• Manufacturer: Fujitsu Media Devices

Hardware Reset
Write Protect (WP)
Accelerated Program Operation
V
CCQ
protected again. Refer to “Temporary Sector Group Unprotection Timing Diagram” in
FORMS and “Temporary Sector Group Unprotection Algorithm” in
The device may be reset by driving the RESET pin to V
be kept low (V
of being executed is terminated and the internal state machine is reset to the read mode “t
pin is driven low.
Furthermore once the RESET pin goes high the device requires an additional “t
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 a program or erase operation, the data at that
particular location are corrupted.
Aside from Sector Group Protection, MBM29PL65LM provides another function that protects the first sector
(SA0) during programming and erase. When WP = V
Group Protection for all the other sectors are temporarily lifted.
The device offers accelerated program operation which enables the programming in high speed. If the system
asserts V
program operation will reduce to about 85%. 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
V
The output voltage generated on the device is determined based on the V
to operate in mixed-voltage environments, driving and receiving signals to and from other devices on the same
bus.
ACC
from ACC pin while programming. See “Accelerated Program Timing Diagram”.
ACC
ACC
to the ACC pin, the device automatically enters the acceleration mode and the time required for
IL
) for at least “t
from the ACC pin and applying V
RP
” in order to properly reset the internal state machine. Any operation in the process
IL
or V
IL
IH
, this first sector (SA0) becomes protected while Sector
IL
returns the device to normal operation. Do not remove
. The RESET pin has a pulse requirement and has to
MBM29PL65LM
FLOW CHART.
CCQ
level. This feature allows the device
RH
” before it allows read access.
READY
SWITCHING WAVE-
” after the RESET
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