The TC2030-CTX-20 is the TC2030-CTX with a 20-pin 0.05″ Cortex Debug+ETM connector, for debuggers such as the IAR I-jet and Keil ULINKpro. It carries SWD, SWO and reset to a 6-pad TC2030 footprint on your PCB, with no header fitted to the board.
- Debugger end
- 20-pin 0.05″ (1.27 mm) Cortex Debug+ETM
- Board end
- TC2030 footprint, 6 pads
- Interface
- SWD + SWO + nRESET
- Not carried
- ETM trace (pins 11 to 20), full JTAG
Connector to Tag-Connect Head
Pin Table
| TC2030 pad | Signal | Cortex Debug+ETM pin | Connect on your PCB to |
|---|---|---|---|
| 1 | VTref | 1 | Target Vdd. Sets the debugger's I/O level; no series resistor |
| 2 | SWDIO / TMS | 2 | MCU SWDIO |
| 3 | nRESET | 10 | MCU reset pin, active low |
| 4 | SWCLK / TCK | 4 | MCU SWCLK |
| 5 | GND | 3, 5, 9 | Ground. Pin 9 is GNDDetect, so the debugger sees a target attached |
| 6 | SWO / TDO | 6 | MCU SWO, for trace output. Optional: leave unconnected if not used |
Cortex Debug+ETM pins 7, 8 and 11 to 20 are not carried, so this cable gives you no parallel ETM trace. For trace, use the TC2030-CTX-ETM, which adds a 10-pad TC2050 head for pins 11 to 20. For full JTAG, use the 10-pad TC2050-IDC-050-ALL family.
Pinout confirmed?The TC2030-CTX-20 plugs straight into your debugger's 20-pin Cortex connector.
Buy TC2030-CTX-20 →Footprint
- Six pads, Ø0.79 mm (0.031″), on a 1.27 mm (0.050″) pitch in two rows of three. Seen from the component side with the single alignment hole on the left, the top row is pads 2, 4, 6 and the bottom row is 1, 3, 5.
- Legged cables need four extra latch holes; the no-legs (NL) footprint needs only the pads and alignment holes. Mechanical drawings (PDF): TC2030 legged footprint, Rev B and TC2030-NL no-legs footprint, Rev B.
- No solder paste on the pads. Keep other tracks at least 0.5 mm (0.020″) from any pad.
- Mark the footprint "do not fit" on your BOM, so nobody tries to buy a part for it.
Debuggers This Cable Fits
Any debugger with a 20-pin 0.05″ Cortex Debug+ETM connector, including the IAR I-jet and Keil ULINKpro. For a debugger with the 10-pin 0.05″ Cortex connector, use the TC2030-CTX. For a J-Link or ST-LINK/V2 with the 20-pin 0.1″ connector, use the ARM20-CTX adapter with a TC2030-IDC cable. Full list in our Tag-Connect cable guide.
Other Versions of This Cable
These cables have the same 20-pin 0.05″ connector and the same TC2030 head, so the diagram and pin table above apply to both. Tag-Connect makes no SOFT or LEMTA version of the 20-pin cable. The TC2030-CTX-ETM uses the same connector but adds a second head, so it has its own page. Differences are highlighted.
| Cable | Tag-Connect head | What is different | |
|---|---|---|---|
| TC2030-CTX-20this page | Legged | The reference cable. Legs clip into the board for hands-free debugging. | Buy → |
| TC2030-CTX-20-NL | No legs | Smaller footprint: pads and alignment holes only, no latch holes. Hold it by hand or with a TC2030-CLIP. | Buy → |
Questions
Which Pins of the 20-Pin Connector Does the TC2030-CTX-20 Use?
Pins 1 to 10, wired exactly as the TC2030-CTX: VTref on pin 1, SWDIO on 2, SWCLK on 4, SWO on 6, nRESET on 10, and ground on 3, 5 and 9. Pins 11 to 20 (ETM trace) are not connected.
Can I Capture ETM Trace with the TC2030-CTX-20?
No. It carries SWO only. For 4-bit parallel trace use the TC2030-CTX-ETM, which adds a TC2050 head for the trace pins.
What Is the Difference Between the TC2030-CTX-20 and TC2030-CTX-20-NL?
Only the head. The legged version clips into four latch holes on the board; the NL version needs no latch holes and is held by hand or with a TC2030-CLIP.
Buy the Cable and Accessories
Everything on this page uses the TC2030-CTX-20. Add the clip if you choose the no-legs version, or the demo PCB to try the footprint before your board goes to fab.
TC2030-CTX-20
6-pin Plug-of-Nails cable for debuggers with the 20-pin 0.05″ Cortex Debug+ETM connector. Legged or no-legs.
Buy TC2030-CTX-20 →TC-FOOTPRINT
Demo PCB with every Tag-Connect footprint, to try cables before you commit a layout.
Buy TC-FOOTPRINT →Pin assignment: Tag-Connect TC2030-CTX-20 product page and TC2030-CTX datasheet. Footprint: Tag-Connect TC2030-IDC and TC2030-IDC-NL footprint drawings, Rev B. Checked 4 Oct 2026. Diagram redrawn by Debug Store in our house style. Tag-Connect and Plug-of-Nails are trademarks of Tag-Connect LLC. Debug Store is a UK specialist distributor of embedded debug, programming and test equipment, supplying engineers worldwide since 1990.