ep2c35 Altera Corporation, ep2c35 Datasheet - Page 37

• Manufacturer Part Number: ep2c35
• Description: Cyclone Ii Device Family Data Sheet
• Manufacturer: Altera Corporation

Altera Corporation
February 2007
PLLs
Cyclone II PLLs provide general-purpose clocking as well as support for
the following features:
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■
■
■
■
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Cyclone II devices contain either two or four PLLs.
PLLs available for each Cyclone II device.
EP2C5
EP2C8
EP2C15
EP2C20
EP2C35
EP2C50
EP2C70
Table 2–3. Cyclone II Device PLL Availability
Device
Clock multiplication and division
Phase shifting
Programmable duty cycle
Up to three internal clock outputs
One dedicated external clock output
Clock outputs for differential I/O support
Manual clock switchover
Gated lock signal
Three different clock feedback modes
Control signals
PLL1
v
v
v
v
v
v
v
PLL2
Cyclone II Device Handbook, Volume 1
v
v
v
v
v
v
v
PLL3
v
v
v
v
v
Cyclone II Architecture
Table 2–3
shows the
PLL4
v
v
v
v
v
2–25