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參數(shù)資料
| 型號： | 101-0558 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數(shù)： | 32/94頁 |
| 文件大?。?/td> | 0K |
| 描述： | COMPUTER SNG BD BL1800 512K SRAM |
| 標準包裝： | 10 |
| 系列： | SBC |
| 模塊/板類型： | 單板計算機模塊 |
| 適用于相關產(chǎn)品： | BL1800 |
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34
Jackrabbit (BL1800)
3.8 Other Hardware
3.8.1 External Interrupts
Jackrabbit boards that carry the CE mark have external interrupts available on digital
inputs PE4 and PE5.
3.8.2 Clock Doubler
Jackrabbit BL1810 and BL1820 models take advantage of the Rabbit 2000 microproces-
sor’s internal clock doubler. A built-in clock doubler allows half-frequency crystals to be
used to reduce radiated emissions. The 14.74 MHz frequency is generated using a
7.37 MHz resonator. The clock doubler is disabled automatically in the BIOS for crystals
or resonators with a frequency above 12.9 MHz.
The clock doubler may be disabled if 14.74 MHz clock speeds are not required. Disabling
the Rabbit 2000 microprocessor’s internal clock doubler will reduce power consumption
and further reduce radiated emissions. Disable the clock doubler by adding a simple con-
figuration macro as shown below.
1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.
2. Add the line CLOCK_DOUBLED=0 to always disable the clock doubler.
The clock doubler is enabled by default, and usually no entry is needed. If you need to
specify that the clock doubler is always enabled, add the line CLOCK_DOUBLED=1 to
always enable the clock doubler. The clock speed will be doubled as long as the crystal
frequency is less than or equal to 26.7264 MHz.
3. Click OK to save the macro. The clock doubler will now remain off whenever you are
in the project file where you defined the macro.
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| 101-0411 | INTERFACE 12KEYDISP ETHNT OP6700 |
| AT24C02A-10PI-2.7 | IC EEPROM 2KBIT 400KHZ 8DIP |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 10105584 | 制造商:Amphenol Corporation 功能描述:10-341374-222 - Bulk |
| 101055OO | 制造商:TE Connectivity 功能描述: |
| 101056084S | 制造商:Amphenol Aerospace 功能描述:CONNECTOR |
| 101-0561 | 功能描述:模塊化系統(tǒng) - SOM RCM3400 RABBITCORE 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 |
| 10-105610-02S | 制造商:Amphenol Aerospace 功能描述:PLUG |
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