MC68HC908GP20 Datasheet, PDF (119/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

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):
f_BUS
2.0 MHz
2.4576 MHz
2.5 MHz
4.0 MHz
4.9152 MHz
5.0 MHz
7.3728 MHz
8.0 MHz
Table 7-1. Numeric Example
f_RCLK
32.768 kHz
32.768 kHz
32.768 kHz
32.768 kHz
32.768 kHz
32.768 kHz
32.768 kHz
32.768 kHz
R
N
PE
L
1
F5
0 0 D1
1
12C
01
80
1
132
0
1
83
1
1E9
0 1 D1
1
258
0
2
80
1
263
0
2
82
1
384
0 2 C0
1
3D1
0 2 D0
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
Advance Information
119