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1
SMSC EMC2102 manual available for free PDF download: User Manual
SMSC EMC2102 User Manual (38 pages)
Brand:
SMSC
| Category:
Controller
| Size: 4 MB
Table of Contents
Table of Contents
2
1 Overview
6
2 Audience
6
3 References
6
4 The Evaluation System
6
Figure 4.1 EMC2102 Fan Control Evaluation System
7
Figure 4.2 EVB-EMC2102 Board
7
5 Basic Operation Experiments
8
Experiment 1 - Manual Fan Control
8
Chipman Installation
8
Setting up the Chipman
8
Figure 5.1 Chipman Message for First Operation
8
Figure 5.2 Chipman Device Selection Window
9
Figure 5.3 Selecting the Device and Master Controller Type
10
Figure 5.4 Chipman Operation Window
10
Figure 5.5 Changing Fan Speed
11
Plotting from Chipman
12
Figure 5.6 Plotting from the Chipman
12
Experiment 2 - RPM Based Closed-Loop Fan Control
13
Getting Started
13
Figure 5.8 Plot Examples
13
Figure 5.7 Plot Windows
13
Basic RPM Based Fan Control
14
Effects of Loading
14
Figure 5.9 Plots for Proper Control Settings
14
Figure 5.10 Effects of Loading
14
Register Change Summary
15
Experiment 3 - Spin-Up Configuration Options
16
Fan Control Parameters
16
Figure 5.11 Fan Control Parameters
16
Getting Started
17
Forced Kick Function
17
Spin-Up Level
17
Figure 5.12 Forced Kick Function
17
Spin-Up Time
18
Figure 5.13 60% Spin Level Setting
18
Figure 5.14 Reduced Spin-Up Time
18
Register Change Summary
19
Experiment 4 - RPM Drive Mode Rate Controls
20
General Setup
20
Controlling the Ramp Rate
20
Figure 5.15 Default Ramp Rate
20
Figure 5.16 Default Step Size with Different UPDATE Settings
21
Figure 5.17 Default UPDATE with Different Step Size Settings
21
Register Change Summary
22
Figure 5.18 Exceptionally Slow Rate
22
Experiment 5 - Optimizing RPM Control Response
23
General Setup
23
Fan Configuration Register (52H)
23
Figure 5.19 Update Time Modifications
23
FAN Minimum Drive Register (55H) and Valid TACH Count (56H)
24
Figure 5.20 Minimum Drive Setting
24
Figure 5.21 Valid Tach Count Setting
24
Register Change Summary
25
Experiment 6 - Limits and Alerts
26
General Setup
26
Fan Spin and Stall Interrupts
26
Register Change Summary
27
Figure 5.22 Fan Spin and Stall
27
Experiment 7 - Troubleshooting
28
Repetitious Spin-Up Routine Caused by Incorrect Settings
28
Figure 5.23 Fan Spin-Up Routine Restarted Repeatedly
28
Figure 5.24 Theoretical Plot of Case 1
29
Figure 5.25 Spin-Up Case 1 Fix 1
29
Figure 5.26 Spin-Up Case 1 Fix 2
30
Figure 5.27 Theoretical Plot of Case 2
30
Figure 5.28 Spin-Up Case 2
31
Figure 5.29 Theoretical Plot of Case 3
31
Figure 5.30 Spin-Up Case 3
32
Figure 5.31 Spin-Up Routine Restarted During Normal Operation
32
Figure 5.32 Theoretical Plot of Case 4
33
Figure 5.33 Spin-Up Case 4
33
Figure 5.34 Spin-Up Case 5
34
Figure 5.35 Spin-Up Case 5 Fix
34
6 Appendix
35
DC Fan Basics - Poles, Tach Meter Pulses and Edges
35
Figure 6.1 a Typical 2-Pole DC Fan
35
Figure 6.2 Output Signal of a 2-Pole Fan
35
Characterizing a DC Fan with EVB-EMC2102 and Chipman
36
General Setup
36
Figure 6.3 Fan TACH Measurement with EMC2102
36
Set the Correct LIMIT2K Value
37
Determine the Number of Poles and the Maximum Fan Speed
37
Determine the Minimum Startup Speed
37
Determine the Stall Speed
37
Determine the Minimum Valid TACH Speed
37
Determine the Spin-Up Levels (Rpm60 and Rpm75)
38
Using the Tested Parameters
38
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