參數(shù)資料
型號(hào)： TH50VSF2581AASB
廠商： Toshiba Corporation
元件分類： 圓形連接器
英文描述： Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:7; Connector Shell Size:18; Connecting Termination:Solder; Circular Shell Style:Square Flange Receptacle; Body Style:Straight
中文描述： SRAM和閃存混合多芯片封裝
文件頁(yè)數(shù)： 31/50頁(yè)
文件大小： 546K
代理商： TH50VSF2581AASB
TH50VSF2580/2581AASB
2001-10-26 31/50
DATA PROTECTION
The TH50VSF2580/2581AASB includes a function which guards against malfunction or data corruption.
Protection against Program/Erase Caused by Low Supply Voltage
To prevent malfunction at power-on or power-down, the device will not accept commands while V
CCf
is below
V
LKO
. In this state, command input is ignored.
If V
CCf
drops below V
LKO
during an Auto Operation, the device will terminate Auto-Program execution. In
this case, Auto operation is not executed again when V
CCf
return to recommended V
CCf
voltage Therefore,
command need to be input to execute Auto operation again.
When V
CCf
>
V
LKO
, make up countermeasure to be input accurately command in system side please.
Protection against Malfunction Caused by Glitches
To prevent malfunction during operation caused by noise from the system, the device will not accept pulses
shorter than 3 ns(Typ.) input on WE, CEF or OE . However, if a glitch exceeding 3 ns(Typ.) occurs and the
glitch is input to the device malfunction may occur.
The device uses standard JEDEC commands. It is conceivable that, in extreme cases, system noise may be
misinterpreted as part of a command sequence input and that the device will acknowledge it. Then, even if a
proper command is input, the device may not operate. To avoid this possibility, clear the Command Register
before command input. In an environment prone to system noise, Toshiba recommend input of a software or
hardware reset before command input.
Protection against Malfunction at Power-on
To prevent damage to data caused by sudden noise at power-on, when power is turned on with WE
=
CEF
=
V
IL
, the device does not latch the command on the first rising edge of WE or CEF. Instead, the device
automatically Resets the Command Register and enters Read Mode.
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