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參數(shù)資料
| 型號： | DS2251T-128-16 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Microcontroller |
| 英文描述： | 8-BIT, MICROCONTROLLER, SMA72 |
| 封裝： | SIMM-72 |
| 文件頁數(shù)： | 12/20頁 |
| 文件大?。?/td> | 654K |
| 代理商： | DS2251T-128-16 |
DS2251T
2 of 20
The DS2251T provides the benefits of NV RAM without using I/O resources. Between 32 kbytes and 128
kbytes of onboard NV RAM are available. A non-multiplexed Byte-wide address and data bus is used for
memory access. This bus, which is available at the connector, can perform all memory access and also
provide decoded chip enables for off-board memory mapped peripherals. This leaves the 32 I/O port pins
free for application use.
The DS2251T provides high-reliability operation in portable systems or systems with unreliable power.
These features include the ability to save the operating state, Power-fail Reset, Power-fail Interrupt, and
Watchdog Timer. All nonvolatile memory and resources are maintained for over 10 years at room
temperature in the absence of power.
A user loads programs into the DS2251T via its on-chip serial Bootstrap loader. This function supervises
the loading of software into NV RAM, validates it, then becomes transparent to the user. Software is
stored in onboard CMOS SRAM. Using its internal Partitioning, the DS2251T can divide a common
RAM into user-selectable program and data segments. This Partition can be selected at program loading
time, but can be modified anytime later. The microprocessor will decode memory access to the SRAM,
access memory via its Byte-wide bus and write-protect the memory portion designated as program
(ROM).
ORDERING INFORMATION
PART NUMBER
RAM SIZE
MAX CRYSTAL
SPEED
TIMEKEEPING?
DS2251T-32-16
32 kbytes
16 MHz
Yes
DS2251T-64-16
64 kbytes
16 MHz
Yes
DS2251T-128-16
128 kbytes
16 MHz
Yes
Operating information is contained in the User’s Guide section of the Secure Microcontroller Data Book.
This data sheet provides ordering information, pinout, and electrical specifications.
相關(guān)PDF資料 |
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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