參數(shù)資料
型號(hào)： DS2251T
英文描述： 128k Soft Microcontroller Module
中文描述： 128k柔性微控制器模塊
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 654K
代理商： DS2251T
DS2251T
8 of 20
DS2251T MEMORY MAP WITH (PES=1)
Figure 4
POWER MANAGEMENT
The DS2251T monitors V
CC
to provide Power-fail Reset, early warning Power-fail Interrupt, and switch-
over to lithium backup. It uses an internal band-gap reference in determining the switch points. These are
called V
PFW
, V
CCMIN
, and V
LI
respectively. When V
CC
drops below V
PFW
, the DS2251T will perform an
interrupt vector to location 2Bh if the power-fail warning is enabled. Full processor operation continues
regardless. When power falls further to V
CCMIN
, the DS2251T invokes a reset state. No further code
execution will be performed unless power rises back above V
CCMIN
. All decoded chip enables and the
R/
W
signal go to an inactive (logic 1) state. The
VRST
signal will be driven to a logic 0. V
CC
is still the
power source at this time. When V
CC
drops further to below V
LI
, internal circuitry will switch to the built-
in lithium cell for power. The majority of internal circuits will be disabled and the remaining nonvolatile
states will be retained.
PF
will be driven to a logic 0. The User’s Guide has more information on this
topic. The trip points V
CCMIN
and V
PFW
are listed in the electrical specifications.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2251T_06 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:128k Soft Microcontroller Module
DS2251T08-08 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
DS2251T08-12 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
DS2251T08-16 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
DS2251T128-08 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
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