Altera HardCopy II Clock Uncertainty Calculator - Manual (Page 11)

Altera Corporation 1–5
August 2007 HardCopy II Clock Uncertainty Calculator User Guide
About HardCopy II Clock Uncertainty Calculator
Intra-Clock Transfer
Intra-clock transfer occurs when the source and destination clocks come
from the same PLL/I/O clock pin, as shown in
Figure 1–3 .
Figure 1–3. Intra-Clock Transfer
Inter-Clock Transfer
Inter-clock transfer occurs when the source and destination clocks come
from different PLLs and I/O clock pins, as shown in
Figure 1–4 .
Figure 1–4. Inter-Clock Transfer
PLL
INBUF
Source
Clock
Destination
Clock
Source
Register
Destination
Register
CLK11
CLK11
PLL5
INBUF
Source
Clock
Destination
Clock
Source
Register
Destination
Register
CLK2
CLK7
PLL9