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參數(shù)資料
| 型號： | DS2252T |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Secure Microcontroller Module(安全的微控制器模塊) |
| 中文描述： | 8-BIT, MICROCONTROLLER, SMA40 |
| 封裝： | SIMM-40 |
| 文件頁數(shù)： | 7/15頁 |
| 文件大小： | 125K |
| 代理商： | DS2252T |
DS2252T
021998 7/15
DS2252T MEMORY MAP WITH (PES=1)
Figure 4
DATA MEMORY (MOVX)
64K
16K
REAL–TIME
CLOCK
PROGRAM MEMORY
NV RAM
FFFFh
C000h
8000h
4000h
0000h
PARTITION
NOT ACCESSIBLE
POWER MANAGEMENT
The DS2252T 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 DS2252T 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 DS2252T
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. V
CC
is still the power source at this
time. When V
CC
drops further to below V
LI
, internal cir-
cuitry 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. The
User’s Guide has more information on this topic. The trip
points V
CCMIN
and V
PFW
are listed in the electrical spec-
ifications.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS2252T_06 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Soft Microcontroller Module |
| DS2252T_1 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Secure Microcontroller Module |
| DS2252T08-08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| DS2252T128-08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| DS2252T-128-12 | 功能描述:模塊化系統(tǒng) - SOM RoHS:否 制造商:Digi International 外觀尺寸:ConnectCore 9P 處理器類型:ARM926EJ-S 頻率:150 MHz 存儲容量:8 MB, 16 MB 存儲類型:NOR Flash, SDRAM 接口類型:I2C, SPI, UART 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in |
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