AR# 44714

PLL/MMCM DRP - Simulating XAPP878/XAPP879 Produces "Warning: Address DADDR=25"

描述

When simulating the XAPP878 or XAPP879, the following warnings are seen in ModelSim:

# ** Warning: Warning : Address DADDR=25 on the PLL_ADV instance is unsupported. # # Time: 35430 ns Iteration: 2 Instance: /m5_clock_generator_tb/cinst_m5_clock_generator_1/cinst_pll_adv_1

# ** Warning: Warning : Address DADDR=25 on the PLL_ADV instance is unsupported. # # Time: 35570 ns Iteration: 2 Instance: /m5_clock_generator_tb/cinst_m5_clock_generator_1/cinst_pll_adv_1

# ** Warning: Warning : Address DADDR=26 on the PLL_ADV instance is unsupported. # # Time: 35710 ns Iteration: 2 Instance: /m5_clock_generator_tb/cinst_m5_clock_generator_1/cinst_pll_adv_1

# ** Warning: Warning : Address DADDR=26 on the PLL_ADV instance is unsupported. # # Time: 35850 ns Iteration: 2 Instance: /m5_clock_generator_tb/cinst_m5_clock_generator_1/cinst_pll_adv_1

# ** Warning: Warning : Address DADDR=29 on the PLL_ADV instance is unsupported. # # Time: 35990 ns Iteration: 2 Instance: /m5_clock_generator_tb/cinst_m5_clock_generator_1/cinst_pll_adv_1

# ** Warning: Warning : Address DADDR=29 on the PLL_ADV instance is unsupported.

Why is this the case?

解决方案

ThePLL and MMCM simulation model does not have all of the DRP registers available, so the simulator does not know how to handle them all and produces the warnings mentioned above. You can safely ignore them and the simulation should be correct. The warnings do not affect overall operation of the simulation.

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AR# 44714
日期	12/15/2012
状态	Active
Type	综合文章
器件	Spartan-6 LX Spartan-6 LXT Spartan-6Q More Virtex-6 CXT Virtex-6 HXT Virtex-6 LX Virtex-6 LXT Virtex-6 SXT Virtex-6Q Virtex-6QL Less

AR# 44714

PLL/MMCM DRP - Simulating XAPP878/XAPP879 Produces "Warning: Address DADDR=25"

描述

解决方案

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