SPRSP61 Data sheet

PRODMIX

Table 6-4 Possible Reference Clock Sources

CLOCK SOURCE	DESCRIPTION
INTOSC1	Internal oscillator 1. Zero-pin overhead 10-MHz internal oscillator.
INTOSC2⁽¹⁾	Internal oscillator 2. Zero-pin overhead 10-MHz internal oscillator.
X1 (XTAL)	External crystal or resonator connected between the X1 and X2 pins or single-ended clock connected to the X1 pin.

(1) On reset, internal oscillator 2 (INTOSC2) is the default clock source for the PLL (OSCCLK).

Figure 6-14 Clocking System

Figure 6-15 System PLL

In the System PLL figure,

Equation 1.

f_{P L L R A W C L K} = \frac{f_{O S C C L K}}{(R E F D I V + 1)} \times \frac{I M U L T}{(O D I V + 1)}