set_input_delay -clock virtclk -max4[get_ports dina] set_input_delay -clock virtclk -min2[get_ports dina] 5.双沿时钟的约束,对上升沿和下降沿都需要进行约束 create_clock -name clk_ddr -period6[get_ports DDR_CLK_IN] set_input_delay -clock clk_ddr -max2.1[get_ports DDR_IN] set_inpu...
create_clock -name sysclk -period 10 [get_ports clkin] create_clock -name virtclk -period 10 set_clock_latency -source 1 [get_clock virtclk] set_input_delay -clock virtclk -max 4 [get_ports dina] set_input_delay -clock virtclk -min 2 [get_ports dina] 5.双沿时钟的约束,对上升...
Part Number:LMK04828 CLKIN0 got uFL connector so the external clock can be fed to LMK04828. 40MHz differential clock is connected at CLKIN1p/n (pin 34, 35). I am observing 40Mhz clock from CLKIN1 is leaking on CLKIN0 while no input signal at CLKIN0. What co...
CLKINx Input Figure 29. DC-Coupled LVDS or LVPECL Output Driver Figure 33. System Clock Input (SYSCLKP/SYSCLKN) When Using a TCXO/ OCXO with 3.3 V CMOS Output Figure 30. Reference Input Figure 31. SYSCLKx Input Figure 34. System Clock Input (XOA/XOB) in Crystal Mode analog.com Rev...
To work around this issue, the following MIG IP core parameters will need to be updated inside the<mig_core_name>_mig.svmodule: parameter CLKIN_PERIOD = 13328, parameter CLKFBOUT_MULT = 16, // write MMCM VCO multiplier parameter DIVCLK_DIVIDE = 1, // write MMCM VCO divisor ...
Symbol Parameter Test Conditions Min Typ Max Units Digital Inputs (OE, SEL0, SEL1) VLow VHigh Input Low Voltage Input High Voltage Vdd = 2.5 V Vdd = 2.5 V Vdd = 3.3 V 0.4 1.3 V 1.6 IIH High Level Input Current IIL Low Level Input Current -5 CLKin0/0* and CLKin1/1* Input ...
The concept is very general in that a synthesis constraint can as well refer to a circuit's longest clock period, to its maximum acceptable input or output delay (all upper bounds), or even specify a minimum contamination delay (lower bound). Any difference between the target value specified...
Other Parts Discussed in Thread: LMK04821 Is it possible to use one of clkin0 / 1/2 as a reference clock input for single-phase-locked loop mode? THX
See Table 1 . CLKIN jitter also applies to CLKIN_DESKEW and CLKFB_DESKEW in digital compensation. CLKFBIN applies only to analog compensation. This parameter is in regards to the functionality of the MMCM. Input jitter above ~1 MHz is reduced by the filtering properties of the MMCM....
● If LOCKP is already at 1 and CLKIN is lost (no longer present on the input pin), LOCKP stays at 1. In this case, the PLL is unlocked. PLL filter Figure 6 below shows the PLL filter circuit. Recommended values are R1 = 12.5 kΩ, C1 = 250 pF and C2 = 82 pF. Figure 6....