EVB-EMC2104/05 User Manual
Revision 1.0 (08-21-07)
SMSC EMC2104/05
8
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Outputs: FAN_OUT, DAC2, ALERT#, OVERT1#/PWM1, OVERT2#/GPIO4, OVERT3#/GPIO5, and
SYS_SHDN#
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Inputs: CLK_IN and TACH1
3.8
LED Indicators
LEDs indicate the status of the following signals (
3.9
Jumper Settings
This EVB has many jumper configurations to evaluate all of the features of the EMC2104/05 .
Fan control can conveniently be evaluated with the onboard 5V fan. Connecting this fan to J3 will allow
full control from the EMC2104/05 via Chipman.
If a 5V 4-wire fan is available, connectors J1 and J2 can be used to evaluate the EMC2104/05 ’s ability
to drive and control these types of fans. If PWM1 is to control the 4-wire fan, the appropriate register
in Chipman should be set. If PWM2 is desired to drive a 4-wire 5V fan, J2 should be used. In addition,
JP18 must be in postion 2-3 and JP7 in Position 2-3.
Table 3.1 LED Status Indicators
LED
SIGNAL
OFF
GREEN
RED
D3
SYS_SHDN#
+3.3V power OFF
NA
SYS_SHDN#
asserted
LED1
ALERT#
+3.3V power OFF
ALERT# not asserted
ALERT# asserted
LED2
OVERT1#
+3.3V power OFF
OVERT1# not
asserted
OVERT1# asserted
LED3
OVERT2#
+3.3V power OFF
OVERT2# not
asserted
OVERT2# asserted
GPIO4
+3.3V power OFF
GPIO4 logic high
GPIO4 logic low
LED4
+3.3V
+3.3V power OFF
+3.3V power ON
NA
LED5
Bridge Activity
NO Activity on
USB/SMBus Bridge
Activity on
USB/SMBus Bridge
NA
LED6
USB Activity
NO Activity on USB port
Activity on USB port
NA
LED7
OVERT3#
+3.3V power OFF
OVERT3# not
asserted
OVERT3# asserted
GPIO5
+3.3V power OFF
GPIO5 logic high
GPIO5 logic low
LED8
GPIO1
+3.3V power OFF
GPIO1 logic high
GPIO1 logic low
LED9
GPIO2
+3.3V power OFF
GPIO2 logic high
GPIO2 logic low
LED10
GPIO3
+3.3V power OFF
GPIO3 logic high
GPIO3 logic low
LED11
GPIO6
+3.3V power OFF
GPIO6 logic high
GPIO6 logic low
