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Motorola M68CPU32BUG User Manual Page 16

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MOTOROLA MC68332TUT/D
16
Figure 11 Pinout of MC68332 132 Pin Package
To control power supply/ground noise, use dedicated ground and supply planes. When designing a two-lay-
er board, make the power and ground traces on the PCB as large as practical and connect a bypass capac-
itor to each power supply pin. The V
DDI
/V
SSI
and V
DDE
/V
SSE
supply pins should all have dedicated filter
capacitors, and, ideally, all supply pins should be connected to the supply at a single location. A recom-
mended layout technique is shown in Figure 12. Essentially, the bypass capacitor should be positioned so
that it serves the power pin itself rather than the surrounding metal trace. This is accomplished by running
a specific conductor to the power pin and then locating the bypass capacitor as close to the power pin as
possible.
MC68332
18
51
17
117
16
15
14
13
12
11
10
9
8
7
6
5
4
3
131
130
129
128
127
126
125
124
123
122
121
120
119
118
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
116
115
114
113
112
111
110
109
108
107
106
105
104
103
102
101
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
DATA9
DATA10
DATA11
DATA12
DATA13
DATA14
DATA15
ADDR0
PQS7/TxD
RxD
IPIPE/DSO
FREEZE/QUOT
XTAL
EXTAL
XFC
CLKOUT
PF0/MODCLK
PE7/SIZ1
PE6/SIZ0
ADDR1
ADDR2
ADDR3
ADDR4
ADDR5
ADDR6
ADDR7
ADDR8
ADDR9
ADDR10
ADDR11
ADDR12
ADDR13
ADDR14
ADDR15
ADDR16
ADDR17
ADDR18
PQS0/MISO
PQS1/MOSI
PQS2/SCK
PQS3/PCS0/SS
PQS4/PCS1
PQS5/PCS2
PQS6/PCS3
TPUCH0
TPUCH1
TPUCH2
TPUCH3
TPUCH4
TPUCH5
TPUCH6
TPUCH7
TPUCH8
TPUCH9
TPUCH10
TPUCH11
TPUCH13
TPUCH14
TPUCH15
T2CLK
TPUCH12
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
DATA8
V
SS
V
SS
V
SS
V
DD
V
SS
V
DD
V
SS
V
DD
V
DD
V
DD
V
SS
V
SS
V
DD
V
SS
V
DD
V
SS
VSS
VDD
V
SS
V
DD
V
SS
V
DD
V
DD
V
DD
V
SS
V
SS
PE1/DSACK1
PE0/DSACK0
PE2/AVEC
PE3/RMC
PE5/DS
CSBOOT
BGACK/CS2
BG/CS1
BR/CS0
PC0/FC0/CS3
PC1/FC1/CS4
PC2/FC2/CS5
PC3/ADDR19/CS6
PC4/ADDR20/CS7
PC5/ADDR21/CS8
PC6/ADDR22/CS9
ADDR23/CS10
AS
R/W
PF1/IRQ1
PF2/IRQ2
PF3/IRQ3
PF4/IRQ4
PF5/IRQ5
PF6/IRQ6
PF7/IRQ7
BERR
HALT
RESET
TSC
BKPT/DSCLK
IFETCH/DSI
2
1
132
V
STBY
V
DDSYN
V
DD
V
SS
V
SSI
V
DDI
V
SSI
V
SSI
V
DDI
V
SSI
33332TUT MCU PINOUT
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