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User's Guide
SLAU195A – December 2006 – Revised February 2009
AMC6821EVM and AMC6821EVM-PDK
This user’s guide describes the characteristics, operation, and the use of the AMC6821EVM, both by itself
and as part of the AMC6821EVM-PDK. This evaluation module (EVM) is a complete thermal management
kit solution with several fan hardware configuration and temperature sensing options. This manual covers
all pertinent areas involved to properly use this EVM board along with the devices that it supports, as well
as the software tool in exercising the EVM. The physical printed-circuit board (PCB) layout, schematic
diagram, and circuit descriptions are included.
Contents
1 EVM Overview ............................................................................................................... 2
2 PCB Design................................................................................................................... 4
3 EVM Operation ............................................................................................................. 12
4 EVM Software Evaluation Tool Operation .............................................................................. 21
5 Schematic ................................................................................................................... 39
List of Figures
1 Top Silkscreen ............................................................................................................... 4
2 Top Layer (Signal Plane) ................................................................................................... 5
3 Internal Layer 1 (Split Ground Plane) ..................................................................................... 6
4 Internal Layer 2 (Split Power Plane) ...................................................................................... 7
5 Bottom Layer (Signal Plane) ............................................................................................... 8
6 Bottom Silkscreen ........................................................................................................... 9
7 Drill Drawing ................................................................................................................ 10
8 Jumper Setting for 12-V Fan Configuration (3-Wire) .................................................................. 13
9 Jumper Setting for 12-V Fan Configuration (4-Wire) .................................................................. 13
10 Digital Serial Interface Pinout ............................................................................................. 14
11 AMC6821EVM and USB-MODEVM Hardware Setup ................................................................. 15
12 AMC6821EVM-PDK Connection ......................................................................................... 16
13 Spin-Up Process ........................................................................................................... 19
14 PWM Output Comparison During Spin-Up Process ................................................................... 20
15 Spin-Up Process (with NMOS Driver on Power-Up) ................................................................... 20
16 Hardware Configuration Spin-Up Using NMOS FET Drive ........................................................... 21
17 AMC6821EVM and USB-MODEVM Mating Connection .............................................................. 22
18 Block Diagram of the AMC6821EVM-PDK Assembly ................................................................. 22
19 Register Settings ........................................................................................................... 32
List of Tables
1 Parts List .................................................................................................................... 10
2 Factory Default Jumper Setting .......................................................................................... 12
3 USB-MODEVM SW2 Settings ............................................................................................ 17
4 Jumper Setting Function .................................................................................................. 18
Microsoft Windows is a trademark of Microsoft Corporation.
LabVIEW is a trademark of National Instruments Corporation.
I
2
C is a trademark of Philips Electronics.
SLAU195A – December 2006 – Revised February 2009 AMC6821EVM and AMC6821EVM-PDK 1
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