1.5 Pin Assignments
Figure 1-2 shows the pin assignments.
Figure 1-2. LQFP Pin Assignments
1.5.1 Power Supply Pins (VDD and VSS)
VDD and VSS are the power supply and ground pins. The MCU operates
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 shown in
Figure 1-3. Place the bypass capacitors as close to the MCU power pins
as possible. Use high-frequency-response ceramic capacitors for
CBypass. CBulk are optional bulk current bypass capacitors for use in
applications that require the port pins to source high-current levels.
MC68HC908RF2 — Rev. 1