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参数资料
| 型号： | DS2251T-128-16 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Microcontroller |
| 英文描述： | 8-BIT, MICROCONTROLLER, SMA72 |
| 封装： | SIMM-72 |
| 文件页数： | 19/20页 |
| 文件大小： | 654K |
| 代理商： | DS2251T-128-16 |
DS2251T
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DS2251T MEMORY MAP WITH (PES=1) Figure 4
POWER MANAGEMENT
The DS2251T monitors VCC 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 VPFW, VCCMIN, and VLI respectively. When VCC drops below VPFW, 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 VCCMIN, the DS2251T invokes a reset state. No further code
execution will be performed unless power rises back above VCCMIN. 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. VCC is still the
power source at this time. When VCC drops further to below VLI, 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 VCCMIN and VPFW are listed in the electrical specifications.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2251T-64-16 | 8-BIT, 16 MHz, MICROCONTROLLER, SMA72 |
| DS2251T-32-16 | 8-BIT, 16 MHz, MICROCONTROLLER, SMA72 |
| DS2252T-128-16 | 8-BIT, 16 MHz, MICROCONTROLLER, SMA40 |
| DS2252T-64-16 | 8-BIT, MICROCONTROLLER, SMA40 |
| DS2252T-32-16 | 8-BIT, MICROCONTROLLER, SMA40 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2251T-128-16# | 功能描述:模块化系统 - SOM 128K Soft MCU Module RoHS:否 制造商:Digi International 外观尺寸:ConnectCore 9P 处理器类型:ARM926EJ-S 频率:150 MHz 存储容量:8 MB, 16 MB 存储类型:NOR Flash, SDRAM 接口类型:I2C, SPI, UART 工作电源电压:3.3 V 最大工作温度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in |
| DS2251T32-08 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| DS2251T-32-12 | 功能描述:模块化系统 - SOM RoHS:否 制造商:Digi International 外观尺寸:ConnectCore 9P 处理器类型:ARM926EJ-S 频率:150 MHz 存储容量:8 MB, 16 MB 存储类型:NOR Flash, SDRAM 接口类型:I2C, SPI, UART 工作电源电压:3.3 V 最大工作温度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in |
| DS2251T32-12 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| DS2251T-32-16 | 功能描述:模块化系统 - SOM 32K Soft MCU Module RoHS:否 制造商:Digi International 外观尺寸:ConnectCore 9P 处理器类型:ARM926EJ-S 频率:150 MHz 存储容量:8 MB, 16 MB 存储类型:NOR Flash, SDRAM 接口类型:I2C, SPI, UART 工作电源电压:3.3 V 最大工作温度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in |
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