Overview
The Acute MIPI D-PHY Option (BFO-PHY) equips BusFinder analysers with full-speed capture and decode for CSI-2 1.3 and DSI 1.3 across 1+4 lanes up to 2.0 Gbps per lane, including LP-to-HS transition coverage for reliable bring-up and debug.
It displays reconstructed images (RGB, YCbCr, RAW, DSC), counts porches for timing verification, and tallies ECC/CRC errors while exposing packet tables, search and filter tools to pinpoint protocol faults and data integrity issues quickly.
Engineers typically pair this option with the BusFinder BF7264B/BF7264B+/Pro platforms, adding Way Stations, SMPM coax, and differential end-tips for safe access to CLK and D0–D3; see Acute BusFinder BF7264B for the host instrument on The Debug Store.
Related product: Acute BusFinder BF7264B Protocol Analyser — https://thedebugstore.com/products/acute-technology-busfinder-bf7264b-protocol-analyser-uk
Professional MIPI D-PHY Decode for CSI-2 and DSI
Add-on option for Acute BusFinder protocol analysers to capture, decode and visualise MIPI D-PHY traffic from Low-Power to High-Speed transitions.
| Interface | Standard | Lanes | Data Rate | Display Formats | Error Checks |
|---|---|---|---|---|---|
| MIPI D-PHY | V1.2 | 1 + 4 (CLK, D0–D3) | Up to 2.0 Gbps per lane | RGB, YCbCr, RAW, DSC | ECC/CRC count & report |
What it does
- Decodes CSI-2 1.3 and DSI 1.3 packets with DCS 1.3 command analysis.
- Captures from LP init through HS data, with filters to ignore image payloads and extend capture depth.
- Restores and displays image frames; provides porch statistics for timing analysis.
- Searches by packet type, virtual channel, data ID or error; compiles command statistics.
- Detects TE (Tearing Effect) signalling; exports logs to TXT/CSV for post-processing.
Way Station Pinout
| Pair | Signals | Notes |
|---|---|---|
| CLK (Diff) | CLK+ / CLK− | Differential clock input |
| D0 (Diff) | D0+ / D0− | Data lane 0 |
| D1 (Diff) | D1+ / D1− | Data lane 1 |
| D2 (Diff) | D2+ / D2− | Data lane 2 |
| D3 (Diff) | D3+ / D3− | Data lane 3 |
| TE (Optional) | TE | Tearing Effect detection channel |
Signal access: keep solder pigtails under 5 mm; on the DUT, place a 100 Ω termination and connect to the end-tip with ~3 cm coax to minimise loading.
Wiring Quick-Start
- Power and connect the BusFinder; fit the D-PHY Way Station to Slot-B and SMPM coax leads to the end-tips.
- Solder ultra-short pigtails to CLK and D0–D3 differential pairs at the DUT test pads; add optional TE lead if required.
- Launch BusFinder software, select MIPI D-PHY DSI/CSI mode, verify Way Station LEDs, then arm capture in LP mode.
- Use Data Filter to suppress image payloads, enable ECC/CRC counters, and configure triggers on specific packet types.
Ready-to-Run CSV Post-Processing
# Parse BusFinder MIPI CSV and summarise ECC/CRC errors per virtual channel import csv, collections errors = collections.defaultdict(lambda: {"ECC":0, "CRC":0}) with open("mipi_dphy_log.csv", newline="") as f: rd = csv.DictReader(f) for r in rd: vc = r.get("VC","NA") if r.get("ECC_Error") == "1": errors[vc]["ECC"] += 1 if r.get("CRC_Error") == "1": errors[vc]["CRC"] += 1
print("VC, ECC_Errors, CRC_Errors")
for vc, d in errors.items():
print(f"{vc}, {d['ECC']}, {d['CRC']}")Frequently Asked Questions
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