MC68HC908GP32 Datasheet, PDF (118/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Freescale Semiconductor, Inc.
Clock Generator Module (CGMC)
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.
NOTE: The values for P, E, N, L, and R can only be programmed when the PLL
is off (PLLON = 0).
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
Technical Data
116
MC68HC908GP32•MC68HC08GP32 — Rev. 6
Clock Generator Module (CGMC)
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