mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 34

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

General Description
1.6 Pin Functions
1.6.1 Power Supply Pins (V
1.6.2 Voltage Regulator Output Pin (V
Technical Data
34
Description of pin functions are provided here.
V
from a single power supply.
Fast signal transitions on MCU pins place high, short-duration current
demands on the power supply. To prevent noise problems, take special
care to provide power supply bypassing at the MCU as
shows. Place the bypass capacitors as close to the MCU power pins as
possible. Use high-frequency-response ceramic capacitors for C
C
that require the port pins to source high current levels.
V
internally for the MCU operation and the USB data driver. It is also used
to supply the voltage for the external pullup resistor required on the
USB’s D– line. The V
or larger and a 0.1µF ceramic bypass capacitor as
Place the bypass capacitors as close to the V
DD
REG
BULK
and V
DD
is the 3.3V output of the on-chip voltage regulator. V
are optional bulk current bypass capacitors for use in applications
, V
SS
SS
)
are the power supply and ground pins. The MCU operates
General Description
Figure 1-4. Power Supply Bypassing
REG
NOTE: Values shown are typical values.
)
REG
V
pin requires an external bulk capacitor 4.7µF
V
DD
DD
MCU
C
0.1 µF
C
+
BYPASS
BULK
V
SS
REG
MC68HC908JB16
Freescale Semiconductor
pin as possible.
Figure 1-5
Figure 1-4
REG
shows.
—
BYPASS
is used
Rev. 1.1
.