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【应用手册】General-Purpose PLLs in Stratix & Stratix GX Devices
Stratix® and Stratix GX devices have highly versatile phase-locked loops
(PLLs) that provide robust clock management and synthesis for on-chip
clock management, external system clock management, and high-speed
I/O interfaces. There are two types of PLLs in each Stratix and Stratix GX
device: enhanced PLLs and fast PLLs. Each device has up to four
enhanced PLLs, which are feature-rich, general-purpose PLLs supporting
advanced capabilities such as external feedback, clock switchover, phase
and delay control, PLL reconfiguration, spread spectrum clocking, and
programmable bandwidth. There are also up to eight fast PLLs per
device, which offer general-purpose clock management with
multiplication and phase shifting as well as high-speed outputs to
manage the high-speed differential I/O interfaces.
The Altera® Quartus® II software enables the PLLs and their features
without requiring any external devices.ch_1_vol_2(Replaces AN 200).pdf