.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;} .ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;} .ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;} .ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;} .ut-cat p{margin:.6em 0;} .ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;} .ut-cat img{max-width:100%;height:auto;} .ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;} .ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;} .ut-cat td strong{color:#222;} Overview The MSO/UPO2000-I2C adds I2C bus triggering, decoding, and search to your MSO/UPO2000 Series oscilloscope — the standard two-wire bus for sensors, EEPROMs, ADCs, DACs, and peripheral ICs on virtually every circuit board. Debugging I2C issues — NAKs, wrong data, bus contention, clock stretching? This decodes every transaction (address, R/W, data, ACK/NAK) overlaid on the waveform. The option is enabled by a software license keyed to the oscilloscope's serial number and is permanent for the life of the instrument. Key Features I2C Triggering — Trigger on start/stop, device addresses, data values, ACK/NAK, or missing acknowledges. Real-Time Decoding — Decoded I2C transactions on the waveform — address (7/10-bit), R/W, data bytes, ACK/NAK status. Bus Contention Detection — Identifies multi-master arbitration events and SDA/SCL conflicts. Clock Stretching Visibility — Shows when slaves hold SCL low, causing timeout issues. Lifetime License Activation — activate once, owned for the life of the instrument. No subscriptions, no renewals, no maintenance fees. When You Need This Option The option fits the following workflows: Sensor Read Failures — Trigger on a sensor's I2C address to capture successful and failed reads — find NAKs, corrupt data, or marginal timing. Bus Lockup Debug — An 8-device I2C bus freezes intermittently. Decode to identify which device holds SDA or SCL low. Compatibility This option is compatible with all MSO/UPO2000 Series oscilloscopes (MSO/UPO2102, 2104, 2202, 2204 and -S variants). The same capability is offered on other UNI-T oscilloscope families: MSO/UPO3000CS. Frequently Asked Questions Should I buy this individually or get a bundle? If you only need I2C, the individual license covers exactly that protocol. The BND bundle includes every protocol in the series. How is this option activated? The option is enabled by a software license keyed to the oscilloscope's serial number. After purchase, the license is registered on the UNI-T website to generate the license file, which is then loaded onto the instrument from a USB drive through the option-install menu. Refer to the oscilloscope's user manual for the step-by-step procedure. Is the license permanent, or does it require renewal? The license is permanent — a one-time purchase that stays active for the life of the instrument. No subscriptions, no annual renewals, and no expiration.
