MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 111

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68HC908AP Family — Rev. 2.5
MOTOROLA
NOTE:
Exceeding the recommended maximum bus frequency or VCO
frequency can crash the MCU.
5. Select the VCO’s power-of-two range multiplier E, according to
6. Select a VCO linear range multiplier, L, where f
7. Calculate and verify the adequacy of the VCO programmed
8. Verify the choice of P, R, N, E, and L by comparing f
Freescale Semiconductor, Inc.
For More Information On This Product,
this table:
center-of-range frequency, f
the midpoint between the minimum and maximum frequencies
attainable by the PLL.
For proper operation,
and f
application’s tolerance of f
possible to f
NOTE: Do not program E to a value of 3.
VCLKDES
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19,660,800 ≤ f
9,830,400 ≤ f
VCLK.
. For proper operation, f
0 < f
Frequency Range
VCLK
f
VRS
L
VCLK
f
VCLK
VRS
=
< 9,830,400
–
round
f
< 19,660,800
VCLK
=
< 39,321,600
VCLKDES
(
VRS
L
⎛
⎜
⎝
×
--------------------------
2
≤
E
2
. The center-of-range frequency is
f
f
--------------------------
E
VCLK
×
NOM
)f
f
, and f
NOM
NOM
2
×
VCLK
⎞
⎟
⎠
2
Clock Generator Module (CGM)
E
VRS
must be within the
must be as close as
Functional Description
NOM
E
0
1
2
= 125kHz
VCLK
Data Sheet
to f
VRS
111