Modification needed for the Si570 output.
Tony just let me know CLK+ (pin 4) should be connected via a 0.1uF and not direct to T1.
"...Mike Collins did a design review on the RXTX Ensemble and pointed out the a direct connection to the CLK+ output of the Si570 is not allowed in the manufactures spec of the part. The fix is to cut the trace that connects the CLK+ pin of the Si570 to T1. With the trace cut, a 0.1uF capacitor may be soldered between the CLK+ pad and the T1 via. Care should be exercised to make sure the capacitor does not short to the USB ground plane on that part of the circuit board...."
So I modified the build.
Cut a track and stripped away the surrounding PCB and soldered a 0.1uF across the gap. Ugly but it works.
This short video shows the output still fine.
Tony just let me know CLK+ (pin 4) should be connected via a 0.1uF and not direct to T1.
"...Mike Collins did a design review on the RXTX Ensemble and pointed out the a direct connection to the CLK+ output of the Si570 is not allowed in the manufactures spec of the part. The fix is to cut the trace that connects the CLK+ pin of the Si570 to T1. With the trace cut, a 0.1uF capacitor may be soldered between the CLK+ pad and the T1 via. Care should be exercised to make sure the capacitor does not short to the USB ground plane on that part of the circuit board...."
So I modified the build.
Cut a track and stripped away the surrounding PCB and soldered a 0.1uF across the gap. Ugly but it works.
This short video shows the output still fine.
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