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| MC68HC08AS32A Datasheet, PDF (23/296 Pages) Motorola, Inc – Microcontrollers | |||
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Freescale Semiconductor, Inc.
General Description
Pin Assignments
PTC4 1
IRQ
2
RST
3
PTF0/TCH2
4
PTF1/TCH3
5
PTF2/TCH4
6
PTF3/TCH5
7
NC
8
BDRxD
9
BDTxD
10
NC
11
NC
12
PTE0/TxD
13
PTE1/RxD
14
PTE2/TCH0
15
PTE3/TCH1 16
48 NC
47
PTD3/ATD11
46
PTD2/ATD10
45
NC
44
NC
43
PTD1/ATD9
42
PTD0/ATD8
41
PTB7/ATD7
40
PTB6/ATD6
39
PTB5/ATD5
38
PTB4/ATD4
37
PTB3/ATD3
36
PTB2/ATD2
35
PTB1/ATD1
34
PTB0/ATD0
33 PTA7
Figure 1-3. 64-Pin QFP Assignments (Top View)
1.4.1 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 Figure 1-4 shows. 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.
MC68HC08AS32A â Rev. 1
MOTOROLA
General Description
For More Information On This Product,
Go to: www.freescale.com
Data Sheet
23
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