mc68hc908as60 Freescale Semiconductor, Inc, mc68hc908as60 Datasheet - Page 39

• Manufacturer Part Number: mc68hc908as60
• Description: Mc68hc908as60 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

1.5.1 Power Supply Pins (V
MC68HC908AS60 — Rev. 1.0
NOTE:
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 shown in
Figure
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
Freescale Semiconductor, Inc.
is also the ground for the port output buffers and the ground return
must be grounded for proper MCU operation.
and V
For More Information On This Product,
DD
1-4. Place the C1 bypass capacitor as close to the MCU as
and V
SS
Note: Component values shown represent typical applications.
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are the power supply and ground pins. The MCU operates
SS
General Description
Figure 1-4. Power Supply Bypassing
)
V
DD
V
DD
MCU
0.1 F
+
C1
C2
(SPI).
V
SS
General Description
Pin Assignments
Technical Data