44-Pin Qfp Pin Assignments; Pin Functions - Motorola MC68HC908GP32 Technical Data Manual

1.6 Pin Functions

1.6.1 Power Supply Pins (V
MC68HC908GP32 MC68HC08GP32
•
MOTOROLA
Freescale Semiconductor, Inc.
RST
1
PTC0
2
PTC1
3
PTC2
4
PTC3
5
PTC4
6
PTC5
7
PTC6
8
PTE0/TxD
9
PTE1/RxD
10
IRQ
11
Figure 1-4. 44-Pin QFP Pin Assignments
Descriptions of the pin functions are provided here.
and V )
DD SS
V and V are the power supply and ground pins. The MCU operates
DD SS
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.
Rev. 6
—
General Description
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General Description
Pin Functions
PTA1/KBD1
33
PTA0/KBD0
32
V /V
31
SSAD REFL
V /V
30
DDAD REFH
PTB7/AD7
29
PTB6/AD6
28
PTB5/AD5
27
PTB4/AD4
26
PTB3/AD3
25
PTB2/AD2
24
PTB1/AD1
23
Figure 1-5
Technical Data
39