ep1sgx25d Altera Corporation, ep1sgx25d Datasheet - Page 159

• Manufacturer Part Number: ep1sgx25d
• Description: Stratix Gx Device Family Data Sheet
• Manufacturer: Altera Corporation

Figure 4–56. extclkena Signals
Altera Corporation
February 2005
COUNTER
OUTPUT
CLKENA
CLKOUT
unless the PLL is using external feedback mode. In order to lock in
external feedback mode, the external output must drive the board trace
back to the FBIN pin.
Fast PLLs
Stratix GX devices contain up to four fast PLLs with high-speed serial
interfacing ability, along with general-purpose features.
shows a diagram of the fast PLL.
Stratix GX Device Handbook, Volume 1
Stratix GX Architecture
Figure 4–57
4–93