Freescale Semiconductor, Inc.
General Description
Pin Assignments
1.5 Pin Assignments
Figure 1-2 shows the pin assignments.
PTA1/KBD1
V
1
24
23
22
21
20
19
18
17
DD
PTA0
PTB0/MCLK
PTB1
V
2
3
4
5
6
7
8
SS
OSC2
OSC1
PTB2/TCH0
DATA
PTB3/TCLK
UPCLK
MODE
XTAL0
XTAL1
PLLEN
Figure 1-2. LQFP Pin Assignments
1.5.1 Power Supply Pins (V and V )
DD
SS
V
and V are the power supply and ground pins. The MCU operates
SS
DD
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
C
. C
are optional bulk current bypass capacitors for use in
Bulk
Bypass
applications that require the port pins to source high-current levels.
MC68HC908RFRK2
MOTOROLA
AdvanceInformation
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General Description
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