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參數(shù)資料
| 型號： | 20-101-1235 |
| 廠商： | Rabbit Semiconductor |
| 文件頁數(shù)： | 52/119頁 |
| 文件大?。?/td> | 0K |
| 描述： | CORE MODULE RCM5700 |
| 特色產(chǎn)品： | MiniCore? RCM5700 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | MiniCore™ |
| 模塊/板類型： | MPU 核心模塊 |
| 適用于相關(guān)產(chǎn)品： | RCM5700 |
| 其它名稱： | 316-1153 |
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MiniCore RCM5700/RCM6700 User’s Manual
38
4.3.1 Standalone Operation of the RCM5700/RCM6700
The RCM5700/RCM6700 must be programmed via the Interface Board or via a similar arrange-
ment on a customer-supplied board. Once the MiniCore has been programmed successfully, reset
the MiniCore. The MiniCore may be reset by cycling power off/on or by pressing the RESET but-
ton on the Interface Board. The jumper across pins 1–2 on header JP1 on the Interface Board must
be removed in order for the MiniCore to operate in the Run Mode after it is reset. The MiniCore
module may now be removed from the Interface Board for end-use installation.
CAUTION: Power to the Interface Board or other boards should be disconnected when removing
or installing your RCM5700/RCM6700 module to protect against inadvertent shorts across the
pins or damage to the MiniCore if the pins are not plugged in correctly. Do not reapply power
until you have verified that the MiniCore module is plugged in correctly.
4.4 Other Hardware
4.4.1 Clocks
The RCM5700 takes advantage of the Rabbit 5000 microprocessor’s internal clock doubler. A
built-in clock doubler allows half-frequency crystals to be used to reduce radiated emissions. The
50.0 MHz frequency specified for the RCM5700 model is generated using a 25.0 MHz crystal.
The RCM5700 requires that the clock doubler remain enabled for proper Ethernet operation.
The RCM6700 requires that the clock doubler remain disabled, but takes advantage of the Rabbit
6000 microprocessor's internal PLL, providing clock speeds up to 187.5 MHz.
4.4.2 Spectrum Spreader
The Rabbit 5000/6000 features a spectrum spreader, which helps to mitigate EMI problems. The
spectrum spreader is on by default on the RCM5700, but is off on the RCM6700 because of its
115 MHz maximum clock limitation. It may also be turned off or set to a stronger setting. The
means for doing so is through a simple configuration macro as shown below.
1. Select the “Defines” tab from the Dynamic C Options > Project Options menu.
2. Normal spreading is the default, and usually no entry is needed. If you need to specify normal
spreading, add the line
ENABLE_SPREADER=1
For strong spreading, add the line
ENABLE_SPREADER=2
To disable the spectrum spreader, add the line
ENABLE_SPREADER=0
NOTE: The strong spectrum-spreading setting is not recommended since it may limit the maxi-
mum clock speed or the maximum baud rate. It is unlikely that the strong setting will be used in a
real application.
3. Click OK to save the macro. The spectrum spreader will be set according to the macro value
whenever a program is compiled using this project file.
NOTE: Refer to the Rabbit 5000 Microprocessor User’s Manual or the Rabbit 6000 Micropro-
cessor User’s Manual for more information on the spectrum-spreading setting and the maximum
clock speed.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 20-101-1236 | 功能描述:界面開發(fā)工具 INTERFACE BOARD RCM56/57XX RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| 20-101-1246 | 功能描述:模塊化系統(tǒng) - SOM RCM5400W RABBITCORE 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 |
| 20-101-1247 | 功能描述:模塊化系統(tǒng) - SOM RCM5450W RABBITCORE 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 |
| 20-101-1252 | 功能描述:開發(fā)板和工具包 - 其他處理器 RCM56/57 Prototyping Board RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
| 20-101-1253 | 功能描述:開發(fā)板和工具包 - 其他處理器 RCM56/57XX Serial Comm Board RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Systems 工具用于評估:P3041 核心:e500mc 接口類型:I2C, SPI, USB 工作電源電壓: |
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