MC68HC705C4ACB MOTOROLA [Motorola, Inc], MC68HC705C4ACB Datasheet - Page 29

• Manufacturer Part Number: MC68HC705C4ACB
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

1.7 Pin Functions
1.7.1 V
1.7.2 OSC1 and OSC2
MC68HC705C4A • MC68HSC705C4A — Rev. 3.0
MOTOROLA
DD
and V
NOTE:
SS
The following paragraphs describe the MC68HC705C4A signals.
V
from a single power supply.
Very fast signal transitions occur on the MCU pins, placing high
short-duration current demands on the power supply. To prevent noise
problems, take special care to provide good power supply bypassing at
the MCU. Place bypass capacitors as close to the MCU as possible, as
shown in
The OSC1 and OSC2 pins are the control connections for the 2-pin
on-chip oscillator. The oscillator can be driven by:
The frequency of the internal oscillator is f
internal oscillator output by two to produce the internal clock with a
frequency of f
DD
•
•
•
and V
Crystal resonator
Ceramic resonator
External clock signal
Figure
Figure 1-7. Bypassing Layout Recommendation
SS
are the power supply and ground pins. The MCU operates
OP
General Description
.
1-7.
MCU
V
V
DD
SS
C1
V+
+
C2
OSC
. The MCU divides the
General Description
Technical Data
Pin Functions
29