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3.3 DIRECT INPUT/OUTPUT COMMUNICATIONS
Modules shipped since January 2012 have status LEDs that indicate the status of the DIP switches, as shown in the follow-
ing figure.
3
The clock configuration LED status is as follows:
•
Flashing green — loop timing mode while receiving a valid data packet
•
Flashing yellow — internal mode while receiving a valid data packet
•
Solid red — (switch to) internal timing mode while not receiving a valid data packet
The link/activity LED status is as follows:
•
Flashing green — FPGA is receiving a valid data packet
•
Solid yellow — FPGA is receiving a "yellow bit" and remains yellow for each "yellow bit"
•
Solid red — FPGA is not receiving a valid packet or the packet received is invalid
3-40
Figure 3–44: STATUS LEDS
B90 Low Impedance Bus Differential System
3 HARDWARE
GE Multilin
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