mc68hc912d60c Freescale Semiconductor, Inc, mc68hc912d60c Datasheet - Page 42

• Manufacturer Part Number: mc68hc912d60c
• Description: Hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Pinout and Signal Descriptions
3.4 Power Supply Pins
3.4.1 Internal Power (V
3.4.2 External Power (V
3.4.3 V
3.4.4 Analog to Digital Reference Voltages (V
Technical Data
42
DDA
, V
SSA
MC68HC912D60A power and ground pins are described below and
summarized in
All power supply pins must be connected to appropriate supplies.
On no account must any pins be left floating.
Power is supplied to the MCU through V
transitions place high, short-duration current demands on the power
supply, use bypass capacitors with high-frequency characteristics and
place them as close to the MCU as possible. Bypass requirements
depend on how heavily the MCU pins are loaded.
External power and ground for I/O drivers. Because fast signal
transitions place high, short-duration current demands on the power
supply, use bypass capacitors with high-frequency characteristics and
place them as close to the MCU as possible. Bypass requirements
depend on how heavily the MCU pins are loaded.
Provides operating voltage and ground for the analog-to-digital
converter. This allows the supply voltage to the ATD to be bypassed
independently. Connecting V
used will not result in an increase of power consumption.
V
V
If the ATD modules are not used, leaving V
result in an increase of power consumption.
DD
RH0
RH1
DDX
) and Ground (V
, V
, V
) and Ground (V
RL0
RL1
Pinout and Signal Descriptions
: reference voltage high and low for ATD converter 0.
: reference voltage high and low for ATD converter 1.
Table
SS
3-1.
SSX
)
RH
)
, V
DDA
RL
)
to V
DD
DD
if the ATD modules are not
and V
RH
connected to V
MC68HC912D60A — Rev. 3.1
SS
Freescale Semiconductor
. Because fast signal
DD
will not