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Ref# 420826 Intel

Atom™ processor CE4100 119

Platform Design Guide

Intel Confidential

Figure 8-24. GPIO Interface Topology

Table 8-15. GPIO Interface list

Traces Layer Min Length

Max

Length

Trace:

Width/Spacing

Spacing from other

signals

w_TL0

Breakout

0.1” 0.5” 4 mils >=4 mils

w_TL1+w_TL2

Micro strip

1” 15” 4 mils >=8 mils

Notes:

• Match W_TL1 within 0.25 inch.

• All traces impedance required to be 55 Ω+/- 10%.

• Simulation data based on IBIS model.

• All signals should be referenced to ground. Reference to unbroken power plane is also accepted.

1 2 ... 114 115 116 117 118 119 120 121 122 123 124 ... 137 138

Platform Design Guide 1
May 2010 1
Intel Confidential 1
Legal Statements 2
Contents 3
Atom™ processor CE4100 5 5
List of Tables 6
Atom™ processor CE4100 7 7
List of Figures 8
Atom™ processor CE4100 9 9
Revision History 10
Ref# 420826 Intel 11
Platform Design Guide 11
Intel Confidential 11
1.1 Related Documents 12
14 Intel 14
Acronym Definition 15
16 Intel 16
18 Intel 18
20 Intel 20
22 Intel 22
24 Intel 24
3.1.1 1080 Prepreg 25
3.1.4 Break Out Traces 26
4.1 Platform Power Rails 27
28 Intel 28
4.3 Power Decoupling 29
4.4 Power Sequence 31
32 Intel 32
4.5 Reset Sequence 33
4.5.1.1 Warm Reset Sequence 34
36 Intel 36
4.6 Straps 37
38 Intel 38
Topology 39
4.7.2 Design Example Two 40
4.8 Debug Port Guidelines 41
Table 5 44
Routing Guidelines 46
52 Intel 52
58 Intel 58
60 Intel 60
62 Intel 62
5.7 VREF Circuit 65
6.1 Video DAC Interface 67
68 Intel 68
VDACDOUT_P/M 70
1.1k1.1k 70
Caution! 71
72 Intel 72
74 Intel 74
Sodaville Package 75
76 Intel 76
78 Intel 78
80 Intel 80
82 Intel 82
7.1 Overview 85
S Audio Input Interface 85
S Audio Output Interface 86
7.4 S/PDIF Audio Interface 87
88 Intel 88
TL=TL1+TL2+TL3 89
90 Intel 90
8.1.3 SATA Test Note 93
8.2 USB 2.0 94
96 Intel 96
USBRBIASP 97
USBRBIASN 97
Notes: 97
8.2.1.3 USB Power Sequence 98
8.3 Gigabit Ethernet 99
8.4 Expansion Bus Interface 103
Guidelines 103
EXP_IO_WRB 105
8.4.3 Data Bus A 106
8.5 NAND Flash 108
8.5.3 NAND_IO Topology 109
NAND_ALE Topology 110
8.5.5 NAND_CE_N Topology 111
Sodaville 112
C* Interface 114
8.7 UART Interface 115
8.8 GPIO Interface 118
8.9 SPI Serial Interface 120
SodavilleSodaville 121
Recommendation 122
8.10 Smart Card Interface 124
126 Intel 126
9.2 HDVCAP Routing Topology 128
130 Intel 130
10.1.1 CK505 Clock Topology 132
RS=33+/-5% 134
RT=55+/-5% 134
IDT6V49601 135
Routing Recommendation 136
138 Intel 138

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