mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 114

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

Clock Generator Module (CGM)
MC68HC08AZ60 — Rev 1.0
114
NOTE:
For proper operation,
Exceeding the recommended maximum bus frequency or VCO
frequency can crash the MCU.
6. If the calculated f
7. Using the value 4.9152 MHz for f
8. Calculate the VCO center-of-range frequency, f
9. Program the PLL registers accordingly:
Freescale Semiconductor, Inc.
For More Information On This Product,
application, select another f
range multiplier, L. The linear range multiplier controls the
frequency range of the PLL.
center-of-range frequency is the midpoint between the minimum
and maximum frequencies attainable by the PLL.
a. In the upper four bits of the PLL programming register (PPG),
b. In the lower four bits of the PLL programming register (PPG),
Example: f
program the binary equivalent of N.
program the binary equivalent of L.
Clock Generator Module (CGM)
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Example:
Example:
VRS
f
VRS
f
bus
f
BUS
f
VRS
BUS
L
L
= 7
–
is not within the tolerance limits of your
=
=
=
f
VCLK
= L
------------------------------- -
4.9152 MHz
=
round
32 MHz
------------------- -
4.9152 MHz = 34.4 MHz
32 MHz
f
------------ -
VCLK
4
4
BUSDES
f
NOM
f
--------------- -
NOM
f
------------ -
f
VCLK
NOM
2
=
NOM
.
8 MHz
or another f
=
, calculate the VCO linear
7
RCLK
VRS
. The
.
MOTOROLA
10-cgm