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Commit | Line | Data |
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1 | ------------------------------------------------------------------------------- | |
2 | SiLabs CP2110 serial-over-HID, UT612 LCR meter | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is a capture of UART-over-HID communication to a UNI-T UT612 LCR meter | |
6 | which contains the SiLabs CP2110 HID chip and the ES51919 LCR meter chip. | |
7 | UART communication uses 9600/8n1, USB HID runs at full speed (USB1.1 12MHz). | |
8 | ||
9 | The LCR meter actually exclusively transmits data to the PC's RX line. The | |
10 | PC's TX traffic is just a development hack in preparation of bidirectional | |
11 | communication where cables support it. | |
12 | ||
13 | ||
14 | Logic analyzer setup | |
15 | -------------------- | |
16 | ||
17 | The Asix Sigma analyzer was set to 50MHz samplerate. Capture length is 200M | |
18 | samples, which translates to four seconds duration. | |
19 | ||
20 | Probe CP2110 signals | |
21 | -------------------------- | |
22 | 1 USB D+ | |
23 | 2 USB D- | |
24 | 3 UART TX (sigrok to meter) | |
25 | 4 UART RX (meter to sigrok) |