MC68HC705V12CFN MOTOROLA [Motorola, Inc], MC68HC705V12CFN Datasheet - Page 29

• Manufacturer Part Number: MC68HC705V12CFN
• Description: The Motorola microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

1.7.2 V
1.7.3 V
1.7.4 V
1.7.5 OSC1 and OSC2
MC68HC705V12
MOTOROLA
SSA
CCA
REFH
and V
—
Rev. 3.0
REFL
MCU supply pins as possible. Two sets of V
to maintain on-chip supply noise within acceptable limits. Each supply
pin pair will require its own decoupling capacitor. These are high-current
pins.
V
analog-to-digital (A/D) subsystem and the digital-to-analog (D/A) gauge
subsystem. To prevent digital noise contamination, this pin should be
connected directly to a low-impedance ground reference point.
V
of the A/D converter and gauge drivers. This pin must be connected to
the V
this pin should be adequately decoupled to a low-impedance ground
reference.
V
V
V
any loss of accuracy from the A/D converter.
The OSC1 and OSC2 pins are the connections for the on-chip oscillator.
OSC1 is the input to the oscillator inverter. The output (OSC2) will
always reflect OSC1 inverted except when the device is in stop mode
which forces OSC2 high.
SSA
CCA
REFH
REFL
REFH
DD
is a separate ground pad which provides a ground return for the
is a separate supply pin providing power to the analog subsystems
is the negative (low) reference voltage for the A/D subsystem.
and V
is the positive (high) reference voltage for the A/D subsystem.
pin externally. To prevent contamination from the digital supply,
REFL
General Description
should be isolated from the digital supplies to prevent
DD
and V
Functional Pin Descriptions
SS
Advance Information
pins are required
General Description
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