参数资料
型号: 20-101-0492
厂商: Rabbit Semiconductor
文件页数: 32/110页
文件大小: 0K
描述: MODULE OP6800 FULL-FEATURED
标准包装: 1
系列: SBC
模块/板类型: 单板计算机模块
适用于相关产品: OP6800
其它名称: 20-101-492
20-101-492-ND
24
MiniCom (OP6800)
3.5 Other Hardware
3.5.1 Clock Doubler
The OP6800 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 global
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.
相关PDF资料
PDF描述
101-0492 INTERFACE OP6800 W/ETHERNET PORT
11FMN-BMTR-A-TB CONN FMN HSNG 11POS SGL REV SMD
11FMN-BMT-A-TF CONN FMN HSNG 11POS SNGL NOR SMD
AT24C01-10SI-2.7 IC EEPROM 1KBIT 400KHZ 8SOIC
AT24C01-10PI-2.7 IC EEPROM 1KBIT 400KHZ 8DIP
相关代理商/技术参数
参数描述
20-101-0494 功能描述:模块化系统 - SOM RCM2250 RabbitCore Module RoHS:否 制造商:Digi International 外观尺寸:ConnectCore 9P 处理器类型:ARM926EJ-S 频率:150 MHz 存储容量:8 MB, 16 MB 存储类型:NOR Flash, SDRAM 接口类型:I2C, SPI, UART 工作电源电压:3.3 V 最大工作温度:+ 85 C 尺寸:1.97 in x 1.97 in x 6.1 in
20-101-0495 功能描述:处理器配件 BASEPLATE RoHS:否 制造商:Olimex Ltd. 产品:Cable 用于:
20-101-0497 功能描述:单板计算机 OP6810 RoHS:否 制造商:Ampro By ADLINK 外观尺寸:EPIC 处理器类型:Intel Atom D510 频率:1.66 GHz 存储容量:2 GB (max) 存储类型:DDR2, L2 Cache 接口类型:Ethernet, PS/2, SATA, Serial, USB 工作电源电压:5 V, 12 V 功耗:13 W 最大工作温度:+ 70 C 尺寸:165.1 mm x 114.3 mm
201-01050 功能描述:铝质电解电容器 - 带引线 1 uF Electrolytic Capacitor RoHS:否 制造商:Kemet 引线类型: 电容:220 uF 容差:20 % 电压额定值:25 V 工作温度范围: 端接类型:Radial 外壳直径:8 mm 外壳长度:11 mm 引线间隔:5 mm 产品:General Purpose Electrolytic Capacitors 封装:Bulk
201-0105-01 功能描述:印刷电路板和试验板 JTAG 20 Pin Connector RoHS:否 制造商:3M Electronic Solutions Division 产品:Jumper & Insulated Wires 描述/功能:Jumper wire, 22 AWG 0.1 inch 长度:0.1 in 宽度: