Altera HardCopy II Clock Uncertainty Calculator - Manual (Page 12)

1–6 Altera Corporation
HardCopy II Clock Uncertainty Calculator User Guide August 2007
General Description
I/O Transfer
I/O transfer occurs when the clock transfer from an off-chip to the
destination clock (input) or, clock transfer from the source clock to an
off-chip (output), as shown in
Figures 1–5 and 1–6 .
Figure 1–5. Input Transfer
Figure 1–6. Output Transfer
Refer to Appendix A, Clock Transfer Examples for more examples of
clock transfer cases.
Clock Uncertainty Calculator Spreadsheet
The clock uncertainty calculator spreadsheet consists of three parts:
■ Instructions
■ Clock uncertainty calculator
■ Advanced Clock Uncertainty (ACU) calculator
Instructions
The clock uncertainty calculator spreadsheet is a Microsoft Excel-based
file. The first worksheet provides quick-start instructions for using the
calculators. Both the clock uncertainty and advanced clock uncertainty
INBUF
CLK5
PLL10
Destination
Register
DATA
Destination
Clock
PLL7
INBUF
Source
Clock
Source
Register
CLK2 DATA