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參數(shù)資料
| 型號： | DS2251T-128-16 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 21/22頁 |
| 文件大小： | 0K |
| 描述： | IC MICROCNTRLR 128K 16MHZ 72SIMM |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | DS225x |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 16MHz |
| 連通性： | SIO，UART/USART |
| 外圍設(shè)備： | 電源故障復(fù)位，WDT |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器類型： | SRAM |
| RAM 容量： | 128K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 4.5 V ~ 5.5 V |
| 振蕩器型： | 外部 |
| 工作溫度： | 0°C ~ 70°C |
| 封裝/外殼： | 72-SIMM |
| 包裝： | 托盤 |
DS2251T
8 of 22
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
switchover 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 Secure Microcontroller User’s
Guide has more information on this topic. The trip points VCCMIN and VPFW 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-128-16# | 功能描述:模塊化系統(tǒng) - SOM 128K Soft MCU Module 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 |
| DS2251T32-08 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| DS2251T-32-12 | 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 |
| DS2251T32-12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| DS2251T-32-16 | 功能描述:模塊化系統(tǒng) - SOM 32K Soft MCU Module 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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