XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 40

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

General Description
1.5.1 Power Supply Pins (V
Technical Data
40
NOTE:
NOTE:
The following pin descriptions are just a quick reference. For a more
detailed representation, see
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
1-6. 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
Serial Peripheral Interface (SPI)
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
NOTE: Component values shown represent typical applications.
are the power supply and ground pins. The MCU operates
Figure 1-6. Power supply bypassing
SS
General Description
)
V
DD
V
DD
Input/Output Ports
MCU
0.1 µ F
+
C1
C2
on page 285.
V
SS
MC68HC908AZ60A — Rev 2.0
on page 353.
MOTOROLA
Figure