C. time-of-day (tod) clock, Tod clock features, Tod clock device family support – Altera Triple Speed Ethernet MegaCore Function User Manual
Page 201: Tod clock performance and resource utilization, Time-of-day (tod) clock
C
Time-of-Day (ToD) Clock
2014.06.30
UG-01008
The Time-of-Day (ToD) clock provides a stream of timestamps for the IEEE 1588v2 feature.
ToD Clock Features
• Provides a stream of 64-bit and 96-bit timestamps.
• The 64-bit timestamp has 48-bit nanosecond field and 16-bit fractional nanosecond field.
• The 96-bit timestamp has 48-bit second field, 32-bit nanosecond field, and 16-bit fractional nanosecond
field.
• Runs at 125-MHz for the Triple-Speed Ethernet MegaCore function.
• Supports coarse adjustment and fine adjustments through clean frequency adjustment.
• Supports period adjustment for frequency control using the Period register.
• Supports offset adjustment using the AdjustPeriod register.
ToD Clock Device Family Support
Table C-1: Device Family Support
Support
Device Family
Preliminary
Arria V GX/GT/GZ/SoC
Preliminary
Cyclone V GX/GT/SoC
Preliminary
Stratix V GX/GT
No support
Other device families
ToD Clock Performance and Resource Utilization
provides the estimated resource utilization and performance of the ToD clock for the Stratix V
device family. The estimates are obtained by compiling the Triple-Speed Ethernet MegaCore function using
the Quartus II software targeting a Stratix V GX (5SGXMA7N3F45C3) device with speed grade -3.
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