MMCM原语包含MMCME3_BASE和MMCME3_ADV,在UltraScale+ 器件中MMCME4替代MMCME3。UltraScale+ 器件MMCM原语包含MMCME4_BASE和MMCME4_ADV。 MMCME4_BASE实现基本MMCM功能。MMCME4_ADV除了能实现MMCME4_BASE功能外,还可以实现动态可重配等功能。 计算输出时钟频率 时钟输出频率和VCO输出频率计算公式如下,...
61775 - Vivado - Critical warning: [Timing 38-1] DLL output pin(s) used on clock modifying cell clk_gen_i0/clk_core_i0/inst/mmcm_adv_inst without a feedback net: CLKOUT0 CLKOUT1 2月 16, 2023 Knowledge 标题 61775 - Vivado - Critical warning: [Timing 38-1] DLL output pin(s) ...
34901 - 11.5 ChipScope - IBERT - The following error has occurred. Error: map failed on chipscope_ibert. ERROR:PhysDesignRules:1997 - The computed value for the VCO operating frequency of MMCM_ADV instance Description When generating an IBERT core targeting Virtex-6 GTX FPGA, I see the followi...
database for the error code. Solution When an MMCM is generated in Coregen, some factors (Such as CLKFBOUT_MULT_F, CLKFBOUT_MULT_F) are fixed. In the above example, the DRC check contains the following for FVCO: FVCO = 1000*CLKFBOUT_MULT_F/(CLKIN1_PERIOD*DIVCLK_DIVIDE)). ...
67967 - UltraScale/UltraScale+ Memory IP - Error: [Unisim MMCME3_ADV-10] The calculated PFD frequency=799.360512 Mhz. This exceeds the permitted PFD frequency range Sep 23, 2021 Knowledge Title 67967 - UltraScale/UltraScale+ Memory IP - Error: [Unisim MMCME3_ADV-10] The calculated PFD ...
MMCME4_BASE实现基本MMCM功能。MMCME4_ADV除了能实现MMCME4_BASE功能外,还可以实现动态可重配等功能。 计算输出时钟频率 时钟输出频率和VCO输出频率计算公式如下,其中M值通过CLKFBOUT_MULT_F设置,D值通过DIVLK_DIVIDE设置,O的值为通过CLKOUT_DIVIDE.设置。
67967 - UltraScale/UltraScale+ Memory IP - Error: [Unisim MMCME3_ADV-10] The calculated PFD frequency=799.360512 Mhz. This exceeds the permitted PFD frequency range Description Version Found:DDR4/3 v2.1; QDRII+ v1.3; RLD3 v1.3; QDRIV v1.2 ...