MC908AZ60ACFU Freescale Semiconductor, MC908AZ60ACFU Datasheet - Page 132
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MC908AZ60ACFU
Manufacturer Part Number
MC908AZ60ACFU
Description
IC MCU FLASH 8.4MHZ 60K 64QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AZ60ACFUER.pdf
(414 pages)
Specifications of MC908AZ60ACFU
Core Processor
HC08
Core Size
8-Bit
Speed
8.4MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
52
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 15x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Clock Generator Module (CGM)
10.3.2.4 Programming the PLL
Use this 9-step procedure to program the PLL.
(Please also reference
132
1. Choose the desired bus frequency, f
2. Calculate the desired VCO frequency, f
3. Using a reference frequency, f
4. Calculate the VCO frequency, f
5. Calculate the bus frequency, f
6. If the calculated f
multiplier, N. Round the result to the nearest integer.
another f
Example:
Example:
Example: f
RCLK
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
.
CGMVCLK
f
f
f
BUSDES
VCLKDES
VCLKDES
Figure
bus
f
f
Variable
f
f
CGMRCLK
CGMVCLK
f
VCLKDES
CGMVRS
BUSDES
is not within the tolerance limits of your application, select another f
f
f
NOM
BUS
10-1).
= 8 × 4 MHz = 32 MHz
= 8 MHz
= 4 × f
= 4 × 8 MHz = 32 MHz
Example:
Table 10-2. Variable Definitions
BUS
f
Example:
RCLK
f
BUS
Desired Bus Clock Frequency
Desired VCO Clock Frequency
Chosen Reference Crystal Frequency
Calculated VCO Clock Frequency
Calculated Bus Clock Frequency
Nominal VCO Center Frequency
Shifted VCO Center Frequency
CGMVCLK
CGMVCLK
BUSDES
, and compare f
N
, equal to the crystal frequency, calculate the VCO frequency
=
BUSDES
f
=
BUS
f
----------------------- -
VCLKDES
CGMVCLK
-------------------------
f
.
Table 10-2
f
N
CGMRCLK
VCLKDES
=
=
4
=
.
32 MHz
------------------- -
N f
32 MHz
------------------- -
4 MHz
×
.
4
Definition
BUS
CGMRCLK
lists the variables used and their meaning
with f
=
=
8 MHz
8
BUSDES
.
Freescale Semiconductor
BUSDES
or
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