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| MC68HC908RK2 Datasheet, PDF (27/232 Pages) Motorola, Inc – Microcontroller Unit | |||
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1.5 Pin Assignments
Figure 1-2 shows the pin assignments.
General Description
Pin Assignments
PTA0 1
PTB0/MCLK 2
PTB1 3
PTB2/TCH0 4
PTB4/TCH1 5
PTB5 6
PTB3/TCLK 7
OSC1 8
OSC2 9
VSS 10
20 PTA1/KBD1
19 PTA2/KBD2
18 PTA3/KBD3
17 PTA4/KBD4
16 PTA5/KBD5
15 PTA6/KBD6
14 PTA7
13 RST
12 IRQ1
11 VDD
Figure 1-2. SSOP/SOIC 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.
MC68HC908RK2 â Rev. 4.0
MOTOROLA
General Description
Advance Information
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