mc68hc05jp6pe Freescale Semiconductor, Inc, mc68hc05jp6pe Datasheet - Page 25

• Manufacturer Part Number: mc68hc05jp6pe
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

1.6 V
1.7 OSC1 and OSC2 Pins
MC68HC05JJ6/MC68HC05JP6
Freescale Semiconductor
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. Bypassing requirements vary,
depending on how heavily the MCU pins are loaded.
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 15. Ordering
The frequency, f
two to produce the internal operating frequency, f
resistor may be selected between OSC1 and OSC2 by the shunt resistor
mask option.
1. A crystal as shown in
2. A ceramic resonator as shown in
3. An external resistor as shown in
4. An external clock signal as shown in
—
Rev. 3.2
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
General Release Specification
SS
OP
(b)
(a)
. V
. An internal 2 M
DD
(c)
General Description
is the positive
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