SMSC EMC1428, User Manual

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EMC1428 EVB User Manual
Revision 1.0 (08-21-07) SMSC EMC1428
8
3.7 LED Indicators
LEDs indicate the status of the following signals ( Table 3.1 ).
3.8 Jumper Settings
This EVB has many jumper configurations to evaluate the many features of the EMC1428.
This EVB also allows for an off-board diode to be tested (see Table 3.2 ). This is done by removing
both jumpers of the channel of interest. Then connect Pin 1 to the ‘’ terminal of the remote
diode and Pin 3 to the ‘remote-‘ terminal of the remote diode. Make sure a common ground exists
between the remote diode (GPU, etc.) and the EVB-EMC1428. Also ensure that the remote diode is
properly biased according to the diode manufacture.
Table 3.1 LED Status Indicators
LED SIGNAL OFF GREEN RED
LED3 ALERT +3.3V power OFF No ALERT ALERT
LED4 SYS_SHDN +3.3V power OFF NA SYS_SHDN
LED11 +3.3V +3.3V power OFF +3.3V power ON NA
LED12 Bridge Activity NO Activity on
USB/SMBus Bridge
Activity on
USB/SMBus Bridge
NA
LED13 USB Activity NO Activity on USB port Activity on USB port NA
Table 3.2 Remote Diode Configurations
JUMPER CONFIGURATION PIN 1 PIN 2 PIN 3 PIN 4
JP1
On-board diode (Q1) short / DP short / DN
Off-board diode (CPU, GPU, etc.) /
DP
open remote - /
DN
open
JP2
On-board diode (Q2) short / DP short / DN
Off-board diode (CPU, GPU, etc.) /
DP
open remote - /
DN
open
JP3
On-board diode (Q3) short / DP short / DN
Off-board diode (CPU, GPU, etc.) /
DP
open remote - /
DN
open
JP4
On-board diode (Q4) short / DP short / DN
Off-board diode (CPU, GPU, etc.) /
DP
open remote - /
DN
open
JP5
On-board diode (Q5) short / DP short / DN
Off-board diode (CPU, GPU, etc.) /
DP
open remote - /
DN
open
JP6
On-board diode (Q6) short / DP short / DN
Off-board diode (CPU, GPU, etc.) /
DP
open remote - /
DN
open