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MC68HC08AS32A Datasheet(PDF) 23 Page - Motorola, Inc

No. de Pieza. MC68HC08AS32A
Descripción  Microcontrollers
Descarga  296 Pages
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Fabricante  MOTOROLA [Motorola, Inc]
Página de inicio  http://www.freescale.com
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MC68HC08AS32A Datasheet(HTML) 23 Page - Motorola, Inc

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


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