Silicon Laboratories Si5397 Series, User Manual

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5. Status LEDs
Location Silkscreen Color Status Function Indication
D27 5VUSBMAIN Blue Main USB +5 V present
D22 3P3V Blue DUT +3.3 V is present
D26 VDD DUT Blue DUT VDD voltage present
D25 INTR Red MCU INTR (Interrupt) active
D21 READY Green MCU Ready
D24 BUSY Green MCU Busy
D2 LOS_XAXB_B Blue Loss of Signal at XAXB input
D5 LOL_AB Blue Lossof Lock - DSPLL A
D6 LOL_BB Blue Lossof Lock - DSPLL B
D8 LOL_CB Blue Lossof Lock - DSPLL C
D11 INTRB Blue Si5397 Interrupt Active
D12 LOL_DB Blue Loss of Lock _ DSPLL D
D27, D22, and D26 are illuminated when USB +5 V, 3.3 V, and Si5397 Vcore supply voltages, respectively, are present. D25,
D21, and D24 are status LEDs showing onboard MCU activity. D2 indicates loss of signal at XAXB input (either crystal osc or external
reference). D5, D6, D8, D12 indicate loss of lock for one of four internal DSPLLs (A–D). D11 indicates the Si5397 interrupt output is
active (as configured by Si5397 register programming). LED locations are highlighted below with LED function name indicated on board
silkscreen.
Figure 5.1. Status LEDs
UG353: Si5397 Evaluation Board User's Guide
Status LEDs
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