It requires you do download a small Chinese font file, once you’ve done that it displays the PDF just fine. The PDF is in English, it’s only their business name that is also shown in Chinese characters.
I’m curious about that clock, too.
I was looking at a different remote control IC that explained things more fully, and the gist of the timing resistors was this: The timing resistor on the transmitter chip controls how fast the serial signals are sent. The timing resistor on the receiver controls the clock of the decoder; it does run in sync with the transmitter, rather it is the clock of a decoding CPU inside.
I know I’m not explaining that well.
I have some used RC cars I’ve bought just to take apart and hack into some RC airplanes, I’ll be putting them on an O’scope and will get a better idea of the signals.
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