th50vsf3583aasb TOSHIBA Semiconductor CORPORATION, th50vsf3583aasb Datasheet - Page 31

• Manufacturer Part Number: th50vsf3583aasb
• Description: Sram And Flash Memory Mixed Multi-chip Package
• Manufacturer: TOSHIBA Semiconductor CORPORATION

DATA PROTECTION
The TH50VSF3582/3583AASB features a function which makes malfunction or data damage difficult.
Protection Against Program/Erase Caused by Low Supply Voltage
V
Auto operation is not executed again when V
to be input to execute Auto operation again.
When V
Protection Against Malfunction Caused by Glitches
shorter than 3 ns(Typ.) input to WE , CEF , or OE . However, if a glitch exceeding 3 ns(Typ.) occurs and the
glitch is input to the device, although rare, malfunction may occur.
an extreme case a part of a command sequence input due to system noise may occur. At this time, the device
acknowledges the part of the command sequence. Then, even if the proper command is input, the device does
not operate. To avoid this, before command input, clear the Command register. In an environment where system
noise occurs easily, Toshiba recommends input of a software or hardware reset before command input.
Protection Against Malfunction at Power-on
= V
device automatically resets the Command register and enters Read mode.
LKO
To prevent malfunction at power on or power down, the device does not receive commands when V
If V
To prevent malfunction caused by noise from the system in operation, the device does not receive pulses
The device uses standard JEDEC commands; thus making command input difficult. It is conceivable that in
To prevent damage to data caused by sudden noise at power on, when power is turned on with WE = CEF
IL
. In this state, command input is ignored.
CCf
and OE = V
CCf
drops below V
> V
LKO
, make up countermeasure to be input accurately command in system side please.
IL
, the device does not latch the command at the first rising edge of WE or CEF . The
LKO
during Auto operations, the device terminates Auto Program execution. In this case,
CCf
return to recommended V
TH50VSF3582/3583AASB
CCf
voltage Therefore, command need
2001-06-08 31/50
CCf
is below