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AM3892 Datasheet(PDF) 155 Page - Texas Instruments

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Part # AM3892
Description  AM389x Sitara ARM Microprocessors (MPUs)
PDF  299 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

AM3892 Datasheet(HTML) 155 Page - Texas Instruments

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AM3894
AM3892
www.ti.com
SPRS681A – OCTOBER 2010 – REVISED MARCH 2011
Complete stackup specifications are provided in Table 8-4.
Table 8-4. PCB Stackup Specifications
NO.
PARAMETER
MIN
TYP
MAX
UNIT
1
PCB routing/plane layers
6
2
Signal routing layers
3
3
Full ground layers under DDR2 routing region
2
4
Number of ground plane cuts allowed within DDR routing region
0
5
Number of ground reference planes required for each DDR2 routing layer
1
6
Number of layers between DDR2 routing layer and reference ground plane
0
7
PCB routing feature size
4
Mils
8
PCB trace width, w
4
Mils
9
PCB BGA escape via pad size(1)
18
20
Mils
10
PCB BGA escape via hole size(1)
10
Mils
11
MPU BGA pad size
12
DDR2 device BGA pad size(2)
13
Single-ended impedance, Zo
50
75
Ω
14
Impedance control(3)
Z-5
Z
Z+5
Ω
(1)
A 20/10 via may be used if enough power routing resources are available. An 18/10 via allows for more flexible power routing to the
MPU.
(2)
For the DDR2 device BGA pad size, see the DDR2 device manufacturer documentation.
(3)
Z is the nominal singled-ended impedance selected for the PCB specified by item 13.
Copyright © 2010–2011, Texas Instruments Incorporated
Peripheral Information and Timings
155
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