mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 37

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

1.6 Pin Functions
1.6.1 Power Supply Pins (V
MC68HC908GP20
Freescale Semiconductor
—
Rev 2.1
Descriptions of the pin functions are provided here.
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.
DD
and V
DD
PTE1/RxD
PTE0/TxD
and V
PTC0
PTC1
PTC2
PTC3
PTC4
PTC5
PTC6
RST
SS
IRQ
are the power supply and ground pins. The MCU operates
11
1
SS
2
3
4
5
6
7
8
9
10
)
Figure 1-3. QFP Pin Assignments
32
31
30
29
28
27
26
25
24
Advance Information
Figure 1-4
23
33
PTA1/KBD1
PTA0/KBD0
V
V
PTB7/AD7
PTB6/AD6
PTB5/AD5
PTB4/AD4
PTB3/AD3
PTB2/AD2
PTB1/AD1
SSAD
DDAD/
/V
V
REFL
REFH
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