Professional 20-Pin ARM to 6-Pin SWD Adapter
The ARM20-CTX adapter transforms standard 20-pin ARM debugger connections into the compact 6-pin Tag Connect TC2030 interface, saving 84% of PCB space whilst maintaining full SWD debugging capability. This adapter enables seamless integration between professional debuggers like Segger J-Link, ST-Link/V2, and PEmicro tools with space-constrained target boards.
Wiring Quick-Start
Standard Connection: 20-pin male connector → debugger, 6-pin IDC connector → TC2030 cable
| 20-Pin ARM Connector | 6-Pin TC2030 Footprint | Function |
|---|---|---|
| Pin 1 (VCC) | Pin 1 | Target reference voltage |
| Pin 7 (SWDIO/TMS) | Pin 2 | Serial wire data I/O |
| Pin 15 (nRESET) | Pin 3 | Target reset signal |
| Pin 9 (SWCLK/TCK) | Pin 4 | Serial wire clock |
| Pins 4,6,8,10,12 (GND) | Pin 5 | Ground reference |
| Pin 13 (SWO/TDO) | Pin 6 | Serial wire output (optional) |
PCB Integration: Target boards require TC2030 footprint (0.05" pitch) consisting of 6 contact pads and 3 alignment holes. No mating connector needed on PCB.
Compatible Debuggers
- Segger J-Link (all models with 20-pin connector)
- ST-Link/V2 and ST-Link/V3SET
- PEmicro Multilink ACP and Universal/FX
- PEmicro Cyclone ARM and LC/FX Universal
- IAR I-Jet (requires ARM20-CTX-M variant)
- Keil ULINK Pro (requires ARM20-CTX-M variant)
[Product connection diagram showing ARM20-CTX between J-Link and target board]
Target Applications
Ideal for ARM Cortex-M microcontrollers requiring SWD programming and debugging on space-constrained PCBs. Compatible with STM32, LPC, Kinetis, and other ARM Cortex-based devices. Enables production programming without dedicated connectors.
ode class="language-c-c"> // Enable SWD debugging in target code void SystemInit(void) { // Ensure SWD pins remain enabled RCC->APB2ENR |= RCC_APB2ENR_AFIOEN; // Do not disable JTAG/SWD pins AFIO->MAPR &= ~AFIO_MAPR_SWJ_CFG; }