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參數(shù)資料
| 型號(hào)： | 101-0404 |
| 廠商： | Rabbit Semiconductor |
| 文件頁(yè)數(shù)： | 30/80頁(yè) |
| 文件大小： | 0K |
| 描述： | MODULE RABBITCORE RCM2000 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | RabbitCore® |
| 模塊/板類型： | MPU 核心模塊 |
| 適用于相關(guān)產(chǎn)品： | RCM2000 |
| 其它名稱： | 316-1008 |
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32
RabbitCore RCM2000
4.5 Other Hardware
4.5.1 Clock Doubler
The RCM2000 takes advantage of the Rabbit 2000 microprocessor’s internal clock dou-
bler. A built-in clock doubler allows half-frequency crystals to be used to reduce radiated
emissions. The 25.8 MHz (RCM 2000 and RCM2010) and 18.4 MHz (RCM 2020) fre-
quencies are generated using 12.9 MHz and 9.2 MHz crystals. The clock doubler is dis-
abled automatically in the BIOS for crystals with a frequency above 12.9 MHz.
The clock doubler can be disabled if 25.8 MHz or 18.4 MHz clock speeds are not required.
Disabling the Rabbit 2000 microprocessor’s internal clock will reduce power consumption
and further reduce radiated emissions. The clock doubler is disabled with a simple config-
uration macro as shown below.
Change the serial baud rate to 57,600 bps when the RCM2000 is operated at 12.9 MHz or
9.2 MHz.
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.
相關(guān)PDF資料 |
PDF描述 |
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| 006200505130000+ | CONN FFC/FPC 5POS 1MM R/A SMD |
| 006208505110000 | CONN FFC/FPC 5POS 1MM ZIF SMD |
| 006208505110000+ | CONN FFC/FPC 5POS 1MM ZIF SMD |
| 395-030-541-204 | CARD EDGE 30POS DL .100X.200 BLK |
| 395-030-541-202 | CARD EDGE 30POS DL .100X.200 BLK |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 101-040400 | 制造商:Distributed By MCM 功能描述:RJ10 PLUGS STRANDED FLAT WIREPK10 |
| 101-040400-24 | 制造商:Distributed By MCM 功能描述:RJ10 PLUGS SOLID STRANDED WIRE FLAT PK10 |
| 10104046SP | 制造商:Pentair Technical Products / Hoffman 功能描述:RFG TXV SPO BBINE2GAB15 |
| 101-0405 | 功能描述:模塊化系統(tǒng) - SOM RCM2010 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(chǔ)容量:8 MB, 16 MB 存儲(chǔ)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 |
| 101-0406 | 功能描述:開(kāi)發(fā)板和工具包 - 其他處理器 Cloning Board RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評(píng)估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
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