Silicon Laboratories Si5347-EVB, User Manual

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S i 5 3 4 7 - E V B
4 Rev. 1.1
5. Status LEDs
D27, D22, and D26 are illuminated when USB +5 V, 3.3 V, and Si5347 Vcore supply voltages,
respectively, are present. D25, D21, and D24 are status LEDs showing on-board 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 4
internal DSPLLs (A–D). D11 indicates Si5347 interrupt output is active (as configured by Si5347 register
programming). LED locations are highlighted below with LED function name indicated on board silkscreen.
Table 2. Si5347-EVB 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 Core voltage present
D25 INTR Red MCU INTR (Interrupt) active
D21 READY Green MCU Ready
D24 BUSY Green MCU Busy
D2 LOS_XAX-
B_B
Blue Loss of Signal at XAXB input
D5 LOL_AB Blue Loss of Lock - DSPLL A
D6 LOL_BB Blue Loss of Lock - DSPLL B
D8 LOL_CB Blue Loss of Lock _ DSPLL C
D11 INTRB Blue Si5347 Interrupt Active
D12 LOL_DB Blue Loss of Lock _ DSPLL D