MC68HC908MR8CP Freescale Semiconductor, MC68HC908MR8CP Datasheet - Page 122
MC68HC908MR8CP
Manufacturer Part Number
MC68HC908MR8CP
Description
IC MCU 8K FLASH 8MHZ PWM 28-DIP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MCHC908MR8VFAE.pdf
(372 pages)
Specifications of MC68HC908MR8CP
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
LVD, POR, PWM
Number Of I /o
12
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Manufacturer
Quantity
Price
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Part Number:
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Clock Generator Module (CGM)
8.4.4 CGM External Connections
Technical Data
122
In its typical configuration, the CGM requires seven external
components. Five of these are for the crystal oscillator and two are for
the PLL.
The crystal oscillator is normally connected in a Pierce oscillator
configuration, as shown in
representation of the internal components and may not represent actual
circuitry.
The oscillator configuration uses five components:
The series resistor (R
oscillator guidelines and may not be required for all ranges of operation,
especially with high frequency 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
information and more information on the filter capacitor’s value and its
effects on PLL performance.
1. Crystal, X
2. Fixed capacitor, C
3. Tuning capacitor, C
4. Feedback resistor, R
5. Series resistor, R
•
•
Bypass capacitor, C
Filter capacitor, C
Clock Generator Module (CGM)
8.11 Acquisition/Lock Time Specifications
also shows the external components for the PLL:
1
S
) is included in the diagram to follow strict Pierce
S
F
1
(optional)
2
Figure
BYP
B
(can also be a fixed capacitor)
8-3.
Figure 8-3
MC68HC908MR8 — Rev 4.1
shows only the logical
Freescale Semiconductor
for routing
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