Datasheet

MC68HC908GP20 — Rev 2.1 Advance Information
Freescale Semiconductor 119
11. Program the PLL registers accordingly:
a. In the PRE bits of the PLL control register (PCTL), program
the binary equivalent of P.
b. In the VPR bits of the PLL control register (PCTL), program
the binary equivalent of E.
c. In the PLL multiplier select register low (PMSL) and the PLL
multiplier select register high (PMSH), program the binary
equivalent of N.
d. In the PLL VCO range select register (PMRS), program the
binary coded equivalent of L.
e. In the PLL reference divider select register (PMDS), program
the binary coded equivalent of R.
Table 7-1 provides numeric examples (numbers are in hexadecimal
notation):
Table 7-1. Numeric Example
f
BUS
f
RCLK
RNPEL
2.0 MHz 32.768 kHz 1 F5 0 0 D1
2.4576 MHz 32.768 kHz 1 12C 0 1 80
2.5 MHz 32.768 kHz 1 132 0 1 83
4.0 MHz 32.768 kHz 1 1E9 0 1 D1
4.9152 MHz 32.768 kHz 1 258 0 2 80
5.0 MHz 32.768 kHz 1 263 0 2 82
7.3728 MHz 32.768 kHz 1 384 0 2 C0
8.0 MHz 32.768 kHz 1 3D1 0 2 D0