Manuale d’uso / di manutenzione del prodotto EMC2102 del fabbricante SMSC
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Insert EVB graphic/photo here (this text can be removed on master page view) SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) Copyright © 2007 SMSC or its sub sidiaries. Al l rights rese rved. Circuit diagrams and other infor mation relating to SMSC product s are included as a means of il lustrating typical applications.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 2 T able of Content s 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Audience .
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 3 6.2.8 Using the Tested Parameters . . . . . . . . . . . .
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 4 List of Figures Figure 4.1 EMC2102 Fan Control Evaluation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4.2 EVB-EMC2102 Board .
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 5 List of T ables Table 5.1 Register Change Summary for Experiment 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 5.2 Register Change Summary for Experiment 3 .
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 6 1 Overview SMSC has introduced a serie s of Environmental Monitoring a nd Control (EMC) devices with integ rated fan control.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 7 Figure 4.1 EMC2102 F an Control Evaluation Syste m Figure 4.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 8 5 Basic Operation Experiment s In this chapter ba sic operation exp eriments will be provided to help users to get familiar wi th the system.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 9 in Figure 5.4, "ChipMan Operati on Window" . Click o n the HWM icon to show the di fferent windows available. The EMC2102 W atchDog will have timed out at this point, and the on-board DC fan will be running at 100%.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 10 Figure 5.3 Selecting the Device and Master C ontroller T ype Figure 5.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 11 Notes: 1. The EVB-EMC2102 needs to be configured usin g the USB SMBus Bridge to work properly .
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 12 5.1.3 Plotting From ChipMan The ChipMan software has the ability to plot regi ster value s in real-time, up to 10Hz contin uous rate. T o select a register to plot, highlight its name or va lue, and right-click.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 13 The two plots shown in Figure 5.8, "Plot Examples" are in sync. If the scaled dat a is desired for analysis or archival, the data may be stored in a se mi -colon separated text file from each of the plot windows.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 14 5.2.2 Basic RPM Based Fan Control The EMC2102 defaults will enable cl osed-loop operatio n. Prior to other options, examine the vari ous parameters on ChipMan window p age 3: Fan Settings.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 15 5.2.4 Register Change Summary T able 5.1, "Register Change Summary for Experiment 2" lists all register value cha nges from the default cmf load to accomplish the tests.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 16 5.3 Experiment 3 - Spin -up Configuration Options This experiment is designed to ga in familiari ty with the va rious spin-up o ptions available in the EMC2102 devices.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 17 the 60% drive the regi ster 51h value i s 153d or 99h, and for 75% it i s 191d or BFh. Tho se two drive settings will run a DC fan at two different speeds and we will cal l them rpm60 and rpm7 5.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 18 Note: When a fan starts, the first T ACH count captured by the EMC2102 may not reflect the fan’s speed correctly , since the counti ng clock (32.768 kHz) coul d only part ially fill the coun ting window , which will cause a higher spee d reading.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 19 5.3.6 Register Change Summary T able 5.2, "Register Change Summary for Experiment 3" lists all register value cha nges from the default cmf load to accomplish the tests.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 20 5.4 Experiment 4 - RPM Drive Mode Rate Controls This experiment is designed to gain familiarity with the ra te control options available in the EMC2102 devices.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 21 In the next experiment ( Figure 5.17, "Default UP DA TE with Different S tep Size Settings" ), two different maximum step sizes, 16 and 63, were used.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 22 5.4.3 Register Change Summary T able 5.3, "Register Change Summary for Experiment 4" lists all register value cha nges from the default cmf load to accomplish the tests.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 23 5.5 Experiment 5 - Opti mizing RPM Control Response This experiment is designed to gain familiarity wi th the parameters that affect the closed-loop controller implemented in the EMC2102.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 24 5.5.3 F AN Minimum Drive Register (55h) and V alid T ACH Count (56h) These two registers assist the user in defining the operational envi ronment for a given fan.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 25 5.5.4 Register Change Summary T able 5.4, "Register Change Summary for Experiment 7" lists all register value cha nges from the default cmf load to accomplish the tests.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 26 5.6 Experiment 6 - Limit s and Alert s This experiment is designed to gain familiarity wit h the control registers for generating fan related alarms and alerts associated with the EMC2 102.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 27 5.6.3 Register Change Summary All register values are default for the tests in this section.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 28 5.7 Experiment 7 - T roubleshooting 5.7.1 Repetitious S pin-up Routine Caused by Incorrect Settings At the end of spin-up routine (see Section 5.3.1, "Fan C ontrol Parameters" ), the EMC2102 checks the T ACH Reading register (58h).
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 29 If the fan is already set to 75% level, we will need to lower the va lid speed (function of 56h, V alid T ACH) to a value below the rpm75, to fix the problem.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 30 5.7.1.2 Case 2 - V alid RPM << T arget RPM < S pin-up Level RPM In this case, the ta rget speed is sma ller than t he spin-up level speed (rpm60 or rpm75) and is much bigger than the valid sp eed.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 31 5.7.1.3 Case 3 - V alid RPM =< T arget RPM << S pin-up Level RPM In this case, the target speed is only a little gr eater than the valid spe ed, and both of them are much smaller than the spin-up level speed (rpm60 or rpm75) .
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 32 Using the EVB-EMC2102 to test th is situation with rpm75 (~5650 rpm), simply set the V alid T ACH register (56h) with 4500 rp m, set the UPDA TE (52h[2:0]) = 100ms an d start the fan with 4700 rpm, the spin-up routine starts over ‘and over ( Fig ure 5.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 33 5.7.1.4 Case 4 - 4.V alid RPM < Spin-up Level R P M ( r p m 6 0 o r r p m 7 5 ) < T a r g e t R P M In this case, the spin-up level speed (rpm60 or rpm75) is greater than the valid speed and smaller than the target speed, as shown in Figure 5.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 34 5.7.1.5 Case 5 - Correct RPM Rela tions hip s with a Slow Response DC Fan In this case, the spin-up routine i s too short to make the fan reach a spee d highe r than the vali d sp eed.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 35 6 Appendix 6.1 DC Fan Basics - Poles, T ach Meter Pulses and Edges An n-pole fan has n pairs of Nort h-South magnetic poles which are ge nerated by electromagnet coil s.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 36 Note: Although users can set the number of edges (in register 52h) to ei ther 3, 5, 7 or 9, it is strongly recommended using the default value 5 while driving a 2-pole DC fan.
Fan S peed Control with the EMC2102 Device SMSC EMC2102 USER MANUAL Revision 0.2 (09-17-07) 37 V erify the device is in Manu al Mode (52h[7] = 0) 6.2.2 Set the Correct LIMIT2K V alue Register 52h (FAN Configuration) bit 6 (LIMIT2K ) is a fan dependent parameter as discussed in Section 5.
Fan S peed Control with the EMC2102 Device Revision 0.2 (09-17-07) USER MANUAL SMSC EMC2102 38 6.2.7 Determine the Spi n-up Levels (rpm60 and rpm75) Drive the fan with 60% of the maximum outpu t (.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il SMSC EMC2102 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del SMSC EMC2102 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso SMSC EMC2102 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul SMSC EMC2102 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il SMSC EMC2102, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del SMSC EMC2102.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il SMSC EMC2102. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo SMSC EMC2102 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
