 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
LCMXO2-640ZE-2MG132C 数据表(PDF) 11 Page - Lattice Semiconductor |
|
||||||||||||||||||||||||||||||
LCMXO2-640ZE-2MG132C 数据表(HTML) 11 Page - Lattice Semiconductor |
|
|
11 / 106 page  2-7 Architecture MachXO2 Family Data Sheet Eight secondary high fanout nets are generated from eight 8:1 muxes as shown in Figure 2-6. One of the eight inputs to the secondary high fanout net input mux comes from dual function clock pins and the remaining seven come from internal routing. The maximum frequency for the secondary clock network is shown in MachXO2 Exter- nal Switching Characteristics table. Figure 2-6. Secondary High Fanout Nets for MachXO2 Devices sysCLOCK Phase Locked Loops (PLLs) The sysCLOCK PLLs provide the ability to synthesize clock frequencies. The MachXO2-640U, MachXO2-1200/U and larger devices have one or more sysCLOCK PLL. CLKI is the reference frequency input to the PLL and its source can come from an external I/O pin or from internal routing. CLKFB is the feedback signal to the PLL which can come from internal routing or an external I/O pin. The feedback divider is used to multiply the reference fre- quency and thus synthesize a higher frequency clock output. The MachXO2 sysCLOCK PLLs support high resolution (16-bit) fractional-N synthesis. Fractional-N frequency syn- thesis allows the user to generate an output clock which is a non-integer multiple of the input frequency. For more information about using the PLL with Fractional-N synthesis, please see TN1199, MachXO2 sysCLOCK PLL Design and Usage Guide. Each output has its own output divider, thus allowing the PLL to generate different frequencies for each output. The output dividers can have a value from 1 to 128. The CLKOS2 and CLKOS3 dividers may also be cascaded together to generate low frequency clocks. The CLKOP, CLKOS, CLKOS2, and CLKOS3 outputs can all be used to drive the MachXO2 clock distribution network directly or general purpose routing resources can be used. 17 8:1 8:1 8:1 8:1 8:1 8:1 8:1 8:1 Clock Pads Routing Secondary High Fanout Net 0 Secondary High Fanout Net 1 Secondary High Fanout Net 2 Secondary High Fanout Net 3 Secondary High Fanout Net 4 Secondary High Fanout Net 5 Secondary High Fanout Net 6 Secondary High Fanout Net 7 |
类似零件编号 - LCMXO2-640ZE-2MG132C |
|
类似说明 - LCMXO2-640ZE-2MG132C |
|
|
链接网址 |
| 隐私政策 |
| ALLDATASHEETCN.COM |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
