XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 29

• Manufacturer Part Number: XC68HC705JJ7
• Description: MICROCONTROLLER
• Manufacturer: Motorola

1.6 V
1.7 OSC1 and OSC2 Pins
MC68HC705JJ7 • MC68HC705JP7 — REV 4
MOTOROLA
DD
and V
SS
Pins
Power is supplied to the MCU through V
supply, and V
supply.
Very fast signal transitions occur on the MCU pins. The short rise and fall
times place very high short-duration current demands on the power
supply. To prevent noise problems, special care should be taken to
provide good power supply bypassing at the MCU by using bypass
capacitors with good high-frequency characteristics that are positioned
as close to the MCU as possible.
The OSC1 and OSC2 pins are the connections for the external pin
oscillator (EPO). The OSC1 and OSC2 pins can accept these sets of
components:
The selection of the crystal/ceramic resonator or RC oscillator
configuration is done by product part number selection as described in
Section 17. Ordering
The frequency, f
two to produce the internal operating frequency, f
•
•
•
•
A crystal as shown in
A ceramic resonator as shown in
An external resistor as shown in
An external clock signal as shown in
SS
General Description
OSC
is ground. The MCU operates from a single power
, of the EPO or external clock source is divided by
Information.
Figure 1-3
Figure 1-3
(a)
Figure 1-3
DD
and V
Figure 1-3
SS
OP
(b)
(a)
. V
.
DD
Advance Information
(c)
General Description
VDD and VSS Pins
is the positive
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