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參數(shù)資料
| 型號： | DS2251T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 128K Soft Microcontroller Module(128K軟件微控制器模塊) |
| 中文描述： | 8-BIT, MICROCONTROLLER, SMA72 |
| 文件頁數(shù)： | 8/20頁 |
| 文件大?。?/td> | 156K |
| 代理商： | DS2251T |
DS2251T
021998 8/20
DS2251T MEMORY MAP WITH (PES=1)
Figure 4
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ììììì
DATA MEMORY (MOVX)
PE3
PE4
64K
48K
32K
16K
REAL–TIME
CLOCK
ìììììì
ìììììì
ìììììì
ìììììì
PROGRAM MEMORY
NV RAM
FFFFh
C000h
8000h
4000h
0000h
PARTITION
ìì
ìì
NOT ACCESSIBLE
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 ref-
erence 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 inter-
rupt vector to location 2Bh if the power–fail warning was
enabled. Full processor operation continues regard-
less. 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 inac-
tive (logic 1) state. The VRST signal will be driven to a 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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