2.8.5 Using Global Resources with PLLs

Each global resource has an associated PLL at its root. For example, PLLA can drive HCLKA, PLLE can drive CLKE, and so on. (see the following figure).

Figure 2-46. Example of HCLKA Driven from a PLL with External Clock Source

In addition, each clock pin of the package can be used to drive either its associated global resource or PLL. For example, package pins CLKEP and CLKEN can drive either the RefCLK input of PLLE or CLKE.

There are two macros required when interfacing the embedded PLLs with the global resources: PLLINT and PLLOUT.