MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 33

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

1.5.1 Power Supply Pins (V
MC68HC708AS48
MOTOROLA
NOTE:
—
Rev. 4.0
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 C1 bypass capacitor as close to the MCU as possible.
Use a high-frequency-response ceramic capacitor for C1. C2 is an
optional bulk current bypass capacitor for use in applications that require
the port pins to source high current levels.
V
for the serial clock in the serial peripheral interface module (SPI). (See
Section 18. Serial Peripheral Interface
V
DD
SS
SS
is also the ground for the port output buffers and the ground return
must be grounded for proper MCU operation.
and V
DD
and V
SS
are the power supply and ground pins. The MCU operates
NOTE: Component values shown represent typical applications.
SS
General Description
Figure 1-4. Power Supply Bypassing
)
V
DD
V
DD
MCU
0.1 F
+
C1
C2
(SPI).)
V
SS
Advance Information
General Description
Figure 1-4
Pin Assignments
33