參數(shù)資料
型號： 20-101-0554
廠商： Rabbit Semiconductor
文件頁數(shù)： 30/94頁
文件大?。?/td> 0K
描述： COMPUTER SNGL BD BL2000 BOTT MNT
標準包裝： 1
系列： SBC
模塊/板類型： 單板計算機模塊
適用于相關產品： BL2000
32
Wildcat (BL2000)
3.9 Other Hardware
3.9.1 External Interrupts
BL2000 boards with a Rabbit 2000 microprocessor labeled IQ3T or higher have external
interrupts available on digital inputs IN2 and IN3. Older BL2000 boards (Rabbit 2000
microprocessors labeled IQ2T) have one external interrupt available—see Technical Note
TN301, Rabbit 2000 Microprocessor Interrupt Problem, for further information on how
to use this interrupt on the older boards.
3.9.2 Clock Doubler
The BL2000 takes advantage of the Rabbit 2000 microprocessor’s internal clock doubler.
A built-in clock doubler allows half-frequency crystals to be used to reduce radiated emis-
sions. The 22.1 MHz frequency is generated using an 11.0592 MHz crystal. The clock
doubler is disabled automatically in the BIOS for crystals with a frequency above
12.9 MHz.
The clock doubler may be disabled if 22.1 MHz clock speeds are not required. Disabling
the Rabbit 2000 microprocessor’s internal clock doubler will reduce power consumption
and further reduce radiated emissions. The clock doubler is disabled with a simple config-
uration 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.
相關PDF資料
PDF描述
006200508130000+ CONN FFC/FPC 8POS 1MM R/A SMD
32FMN-BMTR-A-TB CONN FMN HSNG 32POS SGL REV SMD
32FMN-BMT-A-TF CONN FMN HSNG 32POS SNGL NOR SMD
006200512230000 CONN FFC/FPC 12POS 1MM R/A SMD
101-1051 MODULE MEMORY CORE RCM3365
相關代理商/技術參數(shù)
參數(shù)描述
20-101-0555 功能描述:單板計算機 BL2000 Friction Lock RoHS:否 制造商:Ampro By ADLINK 外觀尺寸:EPIC 處理器類型:Intel Atom D510 頻率:1.66 GHz 存儲容量:2 GB (max) 存儲類型:DDR2, L2 Cache 接口類型:Ethernet, PS/2, SATA, Serial, USB 工作電源電壓:5 V, 12 V 功耗:13 W 最大工作溫度:+ 70 C 尺寸:165.1 mm x 114.3 mm
20-101-0556 功能描述:模塊化系統(tǒng) - SOM BL2000 W/IDCHEADERS 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
20-101-0561 功能描述:模塊化系統(tǒng) - SOM RCM3400 Rabbit Core 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
20-101-0562 功能描述:模塊化系統(tǒng) - SOM RCM3410 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
20-101-0563 功能描述:模塊配件 RCM3400 PROTOTYPING BOARD RoHS:否 制造商:Lantronix 產品: 用于:
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