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PLL Summary Section (Compilation Report)



Lists information about the PLLs in Cyclone devices and the enhanced PLLs and fast PLLs in Stratix and Stratix GX devices. This section is omitted if the design does not include PLLs.

Information is provided for each PLL instance as follows:

PLL Property Description Value
PLL type Shows the type of PLL. Enhanced | Fast | Auto
Scan chain Shows the value specified for the scan chain option. None | Long | Long(unused) | Short | Short(unused)
PLL mode Shows the mode in which the PLL is operating. Normal | Zero delay buffer | No compensation | External feedback
Feedback source Shows the feedback source for the PLL. ExtClk0 | ExtClk1 | ExtClk2 | ExtClk3
Compensate clock Shows the mode of the PLL compensate clock. Clock0 | Clock1 | Clock2 | Clock3 | Clock4 | Clock5 | Global clock | Regional clock | Diffio clock | ExtClock0 | ExtClock1 | ExtClock2 | ExtClock3
Switchover on loss of clock Shows whether the switchover on loss of clock was turned on for the PLL. on | off
Switchover on gated lock Shows whether switchover on gated clock was turned on for the PLL. on | off
Switchover counter Shows the value of the PLL switchover counter. <counter value>
Primary clock Shows which clock acts as the primary clock for the PLL. <clock name>
Input frequency clock0 Shows the input frequency for input clock 0 in megahertz. <input frequency> MHz
Input frequency clock1 Shows the input frequency for input clock 1 in megahertz. <input frequency> MHz
Nominal VCO frequency Shows the value of the minimal VCO frequency for the PLL in megahertz. <frequency>MHz
Freq min lock Shows the minimum lock frequency for the PLL in megahertz. <frequency>MHz
Freq max lock Shows the maximum lock frequency for the PLL in megahertz. <frequency>MHz
Hold conf done Shows whether the QUALIFY_CONF_DONE parameter was turned on for the PLL. on | off
M value Shows the value of the M counter <counter value>
N value Shows the value of the N counter <counter value>
M counter delay Shows the delay value for the M counter. <time> ps
N counter delay Shows the delay value for the N counter. <time> ps
M2 value Shows the spread spectrum modulus for the M counter. <modulus value>
N2 value Shows the spread spectrum modulus for the N counter. <modulus value>
SS counter Shows the value for the spread spectrum counter for the PLL. <counter value>
Downspread Shows the downspread percentage for the PLL in megahertz. <downspread percentage> %
Spread frequency Shows the spread frequency for the PLL in megahertz. <frequency> MHz
Charge pump current Shows the charge pump current value for the PLL in microamperes. <current> uA
Loop filter R Shows the value for the loop filter R resistor in ohms. <value> Ohm
Loop filter C Shows the value for the loop filter C capacitor in picofarads. <value> pF
F zero Shows the frequency of F zero for the PLL. <frequency> MHz
Bandwidth Shows the bandwidth value for the PLL in megahertz or kilohertz. <frequency> MHz | KHz
F pole Shows the frequency of F pole for the PLL in megahertz. <frequency> MHz
Enable0 counter Shows which PLL counter is used by the enable0 input port of DIFFIOCLK. <counter value>
Enable1 counter Shows which PLL counter is used by the enable1 input port of DIFFIOCLK. <counter value>
Real time configurable Shows whether the real time configuration option was turned on for the PLL. on | off
Bit stream for reprogramming Shows the hexadecimal bit stream needed for reprogramming the PLL in real time. The bit stream should be shifted in from left to right: the first bit to shift in is the left-most bit shown in the bit stream for reprogramming value. The direction in which the bit stream needs to be shifted into the PLL is included in the right hand side of the bit stream value. The transfer enable bit is included in the bit stream value and is logic level high and shifted in first (for example, the left-most bit of the bitstream is always a value of one). <bit stream value>

 

The following example shows a portion of the PLL Summary section generated for a sample design:


PLL Summary Section (Compilation Report)


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