SMSC EVB-EMC2104, User Manual

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EVB-EMC2104/05 User Manual
SMSC EMC2104/05 Revision 1.0 (08-21-07)
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Table 3.2 summarizes the options available to drive various 5V fans..
The remote diode on board the EMC2104/05 EVB has a heater and an optional inline series resistance
adjustment. Checking the REC feature of the EMC2104/05 is accomplished by removing the jumper
on JP9. This adds 100 ohms of series resistance to the DN line of the diode connection. To return to
0 ohm series resistance, replace the jumper on JP9.
To heat the diode, place a jumper on JP10 in position 1-2. To return to ambient conditions, place
shorting bar in position 2-3 on JP2. These remote diode options are summarized in
Table 3.3 below.
Table 3.2 Fan Driver Configuration
FAN DRIVER
CONFIGURATION FAN TYPE
FAN
CONNECTOR
REQUIRED
JUMPERS
FAN_OUT 3-wire J3 None -
PWM1 4-wire J1 None, SW programmed
PWM2 4-wire J2 JP7 -Position 2-3
JP18 - Position 2-3
DAC2 2 or 3-wire TP17 user provided offboard
circuitry needed
Table 3.3 Remote Diode and Thermistor Connections and Heater Settings
NAME JUMPER CONDITION 1 CONDITION 2
Ext Diode 1 JP5 onboard diode
JP5 - positions 1-2 and 3-4
JP14 - open
external offboard diode
JP5 - connect DP to pin 1 and DN to pin 3
JP14 - open
Ext Diode 2 JP6 onboard diode
JP6 - positions 1-2 and 3-4
JP16 - open
external offboard diode
JP6 - connect DP to pin 1 and DN to pin 3
JP16 - open
Ext Diode 3/4 JP8 onboard diodes
JP8 - positions 1-2 and 3-4
JP17 - open
external offboard diodes
JP8 - connect DP to pin 1 and DN to pin 3
JP17 - open
REC JP9 100 ohms in
DN line (diode remote -)
JP9 - Open
0 ohms in
DN line (diode remote -)
JP9- Short
HEATER JP10 1W resistive heater on remote
diode Q1
JP10 - Position 1-2
Ambient temp on remote diode Q1
JP10 - Position 2-3
Thermistor 1 JP14 onboard thermistor 1
JP14 - positions 1-2 and 3-4
JP5 - open
Thermistor 2 JP16 onboard thermistor 2
JP16 - positions 1-2 and 3-4
JP6 - open
Thermistor 3 JP17 onboard thermistor 3
JP17 - positions 1-2 and 3-4
JP8 - open