Intel Stratix 10 GX User Manual page 83

6 Board Test System
Figure 37. Clock Controller
The following sections describe the Clock Control controls
Serial Port Registers
The Serial Port Registers control shows the current values from the Si570 registers.
Note: For more information about the Si570 registers, refer to the Si570/Si571 data sheet
available on the Silicon Labs website (www.silabs.com).
fXTAL
The fXTAL control shows the calculated internal fixed-frequency crystal, based on the
serial port register values.
Note: For more information about the fXTAL value and how it is calculated, refer to the
Si570/Si571 data sheet available on the Silicon Labs website (www.silabs.com)
Target Frequency
The Target frequency control allows you to specify the frequency of the clock. Legal
values are between 10 MHz and 945 MHz and select frequencies to 1400 MHz. For
example, 421.31259873 is possible within 100 parts per million (ppm). The Target
Frequency control works in conjunction with the Set New Frequency Control.
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Intel Stratix 10 GX Transceiver Signal Integrity Development Kit User Guide
83