User manual

Protocol Analysis
R&S
®
RTO
259User Manual 1316.0827.02 ─ 06
10.2.2.1 Configuring I²C Protocol
The configuration of the I²C is simple - assign the two lines to input channels, and set the
thresholds.
For details on configuration settings, see chapter 10.2.3.1, "I²C Configura-
tion", on page 260.
1. Press the PROTOCOL key on the front panel.
2. At the left-hand side, select the vertical tab of the bus you want to set up.
3. Select the "Configuration" tab.
4. Tap the "Protocol" button and select the protocol: "I2C".
5. Optionally, you can enter a "Bus label" on the "Display" tab.
6. Tap the "SDA" button, and select the waveform of the data line.
7. Tap the "SCL" button, and select the waveform of the clock line.
8. Set the logical thresholds: Either according to technology definition with "Preset", or
to the middle reference levels with "Set to 50%", or enter a user-defined value directly
in the "Threshold" fileds.
10.2.2.2 Triggering on I²C
Prerequesites: A I²C-bus is configured, see chapter 10.2.2.1, "Configuring I²C Proto-
col", on page 259. SDA and SCL lines are set to channel waveforms.
1. Press the TRIGGER key.
If the "Protocol Configuration" dialog box is open, you can tap the "Trigger Setup"
button.
2. Tap the "Source" button and select the "Serial" trigger source.
3. Select the serial bus that is set to I²C.
4. Select the "Trigger type".
5. For more complex trigger types, enter the address and/or data conditions: address,
acknowledge bits, R/W bit, and data pattern.
For details, see chapter 10.2.3.2, "I²C Trigger", on page 261
I²C