mc68336 Freescale Semiconductor, Inc, mc68336 Datasheet - Page 16

• Manufacturer Part Number: mc68336
• Description: An Introduction To The Mc68331 And Mc68332
• Manufacturer: Freescale Semiconductor, Inc

PQS3/PCS0/SS
PQS0/MISO
PQS1/MOSI
PQS4/PCS1
PQS5/PCS2
PQS6/PCS3
PQS2/SCK
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
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.
16
ADDR10
ADDR11
ADDR12
ADDR13
ADDR14
ADDR15
ADDR16
ADDR17
ADDR18
ADDR1
ADDR2
ADDR3
ADDR4
ADDR5
ADDR6
ADDR7
ADDR8
ADDR9
V STBY
V DD
V DD
V DD
V SS
V SS
V DD
V SS
18
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
V SSI
Freescale Semiconductor, Inc.
Figure 11 Pinout of MC68332 132-Pin Package
For More Information On This Product,
V SSI
DDI
Go to: www.freescale.com
/V
V DDI
SSI
and V
MC68332
V SSI V
DDE
DDI
/V
SSE
supply pins should all have dedicated filter
V SSI
M68331/332TUT/D
MC68331/332
116
115
114
113
112
110
109
108
107
106
105
104
103
102
101
100
111
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
33332TUT MCU PINOUT
V DD
BGACK/CS2
BG/CS1
BR/CS0
CSBOOT
DATA0
DATA1
DATA2
DATA3
V DD
V SS
DATA4
DATA5
DATA6
DATA7
V SS
DATA8
DATA9
DATA10
DATA11
V DD
V SS
DATA12
DATA13
DATA14
DATA15
ADDR0
PE0/DSACK0
PE1/DSACK1
PE2/AVEC
PE3/RMC
PE5/DS
V DD