MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 98
MC908AZ32ACFU
Manufacturer Part Number
MC908AZ32ACFU
Description
IC MCU 32K FLASH 8.4MHZ 64-QFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AZ32ACFUE.pdf
(324 pages)
Specifications of MC908AZ32ACFU
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
40
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K 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)
The series resistor (R
crystals. Refer to the crystal manufacturer’s data for more information.
Figure 8-3
Routing should be done with great care to minimize signal cross talk and noise. (See
Time Specifications
effects on PLL performance).
8.4 I/O Signals
The following paragraphs describe the CGM input/output (I/O) signals.
8.4.1 Crystal Amplifier Input Pin (OSC1)
The OSC1 pin is an input to the crystal oscillator amplifier.
8.4.2 Crystal Amplifier Output Pin (OSC2)
The OSC2 pin is the output of the crystal oscillator inverting amplifier.
8.4.3 External Filter Capacitor Pin (CGMXFC)
The CGMXFC pin is required by the loop filter to filter out phase corrections. A small external capacitor is
connected to this pin.
8.4.4 Analog Power Pin (V
V
potential as the V
8.4.5 Oscillator Enable Signal (SIMOSCEN)
The SIMOSCEN signal enables the oscillator and PLL.
8.4.6 Crystal Output Frequency Signal (CGMXCLK)
CGMXCLK is the crystal oscillator output signal. It runs at the full speed of the crystal (f
comes directly from the crystal oscillator circuit.
to OSC1 and OSC2 and may not represent the actual circuitry. The duty cycle of CGMXCLK is unknown
and may depend on the crystal and other external factors. Also, the frequency and amplitude of
CGMXCLK can be unstable at startup.
98
DDA
•
•
is a power pin used by the analog portions of the PLL. Connect the V
Bypass capacitor, C
Filter capacitor, C
also shows the external components for the PLL:
To prevent noise problems, C
pin as possible with minimum routing distances and no routing of other
signals across the C
Route V
capacitors as close as possible to the package.
DD
for routing information and more information on the filter capacitor’s value and its
pin.
S
) may not be required for all ranges of operation, especially with high-frequency
DDA
F
BYP
carefully for maximum noise immunity and place bypass
DDA
F
)
MC68HC908AZ32A Data Sheet, Rev. 2
connection.
F
should be placed as close to the CGMXFC
Figure 8-3
NOTE
NOTE
shows only the logical relation of CGMXCLK
DDA
pin to the same voltage
Freescale Semiconductor
8.9 Acquisition/Lock
CGMXCLK
) and
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