MSO/UPO3000CS-I2C Embedded serial bus trigger and analysis-I2C
Overview
The MSO/UPO3000CS-I2C adds I2C bus triggering, decoding, and search to your MSO/UPO3000CS 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 UPO1000CS and MSO3000E Series oscilloscopes. The same capability is offered on other UNI-T oscilloscope families: MSO/UPO2000.
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.
