# Title: SEGGER STDC 14 Adapter - 20-pin to 14-pin Debug Connector ## Description: Technical Overview The SEGGER STDC 14 Adapter represents a critical interface solution for embedded systems developers working with STMicroelectronics' STDC14 connector standard. This passive adapter seamlessly bridges the gap between SEGGER's industry-standard 20-pin 0.1" J-Link connector and the compact 14-pin 0.05" STDC connector, maintaining full electrical compatibility across all supported debugging protocols. Connector Specifications STDC14 Pinout Compatibility: Pins 3-12 follow the standard ARM Cortex-M 10-pin debug connector specification, with pins 1-2 reserved and pins 13-14 providing UART functionality for Virtual COM port features. Pin STDC14 Function ARM10 Equivalent Signal Type 1-2 Reserved - Not Connected 3 T_VCC Pin 1 Target Power 4 T_JTMS/T_SWDIO Pin 2 JTAG/SWD Data 5 GND Pin 3 Ground 6 T_JCLK/T_SWCLK Pin 4 Clock Signal 7 GND Pin 5 Ground 8 T_JTDO/T_SWO Pin 6 Trace Output 9 T_JRCLK Pin 7 Return Clock 10 T_JTDI Pin 8 JTAG Data In 11 GND_DETECT Pin 9 Ground Detect 12 T_NRST Pin 10 Reset Signal 13 T_VCP_RX - UART Receive 14 T_VCP_TX - UART Transmit Wiring Quick-Start Connection setup requires no external power or configuration. Simply connect the adapter's 20-pin connector to your J-Link or Flasher probe, then connect the included 14-pin ribbon cable to your target system's STDC14 connector. STDC14 Connector Orientation: Pin 1 typically marked with square pad or dot notation on target boards Compatible Hardware The adapter supports the complete range of SEGGER debug probes including J-Link Pro PoE, J-Link Pro, J-Link ULTRA+, J-Link WiFi, J-Link PLUS series, and J-Link BASE series. All Flasher models are equally supported, providing maximum flexibility across development environments. Target Applications Primary applications include STM32 evaluation boards, custom STM32 designs, and any embedded system implementing the STDC14 connector standard. The adapter proves especially valuable in production environments where existing J-Link infrastructure must interface with newer STDC14-equipped targets. ## Product type: Adapter ## Vendor: SEGGER Microcontroller GmbH ## Tags: Accessory, Adapter, Debugger Accessory, Debugger Adapter, Programmer Adapter, SEGGER, STM32 ## Price range: 49.0 - 49.0 GBP ## Link: https://thedebugstore.com/products/segger-8-06-39-stdc-14-adapter-uk ## Options - Title: Default Title ## Collections - [New Products](https://thedebugstore.com/a/llms/collections/new-products-debug-store) - [Device Programmer Adapters](https://thedebugstore.com/a/llms/collections/device-programmer-adapters-catalogue) - [SEGGER Microcontroller GmbH](https://thedebugstore.com/a/llms/collections/segger-microcontroller-gmbh-catalogue-debug-store) - [Debugger Accessories](https://thedebugstore.com/a/llms/collections/debugger-accessories) ## Variants - Default Title, SKU: 8.06.39, Available: yes, Inventory: 2 ## Metafields - brand: SEGGER - manufacturer: SEGGER Microcontroller GmbH - warranty: 12 months - badge: - widget:

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- title_tag: SEGGER STDC 14 Adapter (8.06.39) | J-Link to STDC14 Debug Connector | Debug Store - description_tag: SEGGER STDC 14 Adapter converts 20-pin J-Link connector to STM STDC14 format. Supports JTAG/SWD debugging. Buy online at Debug Store. - key_feature_1: Adapts J-Link and Flasher debug probes to STMicroelectronics STDC14 connector standard. - backorder_label: If no stock is shown above, order now and we'll ship within 5 working days. - target_keyword: SEGGER STDC 14 Adapter - brands: gid://shopify/Metaobject/56257708255 - breadcrumbs: ["gid://shopify/Collection/269202686141","gid://shopify/Collection/447917162719","gid://shopify/Collection/447953600735"] - manufacturer: SEGGER Microcontroller GmbH - warranty: 12 months - mpn: 8.06.39 - customhs_code: 847180 - summary:

The SEGGER STDC 14 Adapter (8.06.39) enables seamless connection of J-Link and Flasher debug probes to targets featuring STMicroelectronics' 14-pin STDC connector. This passive adapter converts the standard 20-pin 0.1" J-Link connector to the compact 14-pin 0.05" STDC format, maintaining full compatibility with JTAG, SWD, and SWO debugging protocols.

Measuring just 25 x 25 x 11mm, the adapter provides direct electrical connectivity without active components, ensuring reliable signal integrity for Cortex-M and ARM7/9/11-based targets. The included 14-pin ribbon cable allows flexible routing to target systems whilst maintaining the sturdy construction required for repeated development use.

Compatible with the entire SEGGER ecosystem including J-Link Pro, Flasher ARM, and Tag-Connect STDC14 cables, this adapter expands debugging capabilities across STM32 evaluation boards and custom designs using the STDC14 standard.

- key_feature_2: Compatible with all J-Link and Flasher probes - key_feature_2_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Works with J-Link Pro, BASE, ULTRA+, WiFi and all Flasher models for universal compatibility"}]}]} - key_feature_3: Supports JTAG, SWD and SWO protocols - key_feature_3_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Full debugging protocol support including Serial Wire Viewer trace capabilities"}]}]} - key_feature_4: Passive design with no active components - key_feature_4_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Direct electrical connectivity ensures signal integrity without power requirements."}]}]} - key_feature_5: Compact 25 x 25 x 11mm form factor - key_feature_5_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Small footprint allows integration into tight debugging setups without bulk"}]}]} - key_feature_6: Includes 14-pin ribbon cable - key_feature_6_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Flexible cable routing to target systems with reliable IDC connections"}]}]} - key_feature_7: STMicroelectronics STDC14 standard compliant - key_feature_7_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Adheres to official 14-pin 0.05\" connector specification from STMicroelectronics"}]}]} - key_feature_8_tooltip: {"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Built to withstand frequent connections in development and production environments"}]}]} - key_feature_8: Durable construction for repeated use - why_people_choose_3_title: Professional Signal Integrity - why_people_choose_2_title: Cost-Effective Probe Extension - why_people_choose_1_title: STM32 Development Compatibility - why_people_choose_1: Essential for debugging STM32 boards with STDC14 connectors using existing J-Link probes - why_people_choose_3: Passive design maintains clean debug signals for reliable development and production debugging - why_people_choose_2: Extends expensive J-Link investment to new connector standards without buying additional hardware - 1569542: What J-Link models are compatible with the STDC 14 Adapter?***SIMP***The adapter works with all J-Link models including J-Link Pro PoE, Pro, ULTRA+, WiFi, PLUS Classic, PLUS Compact, BASE Classic, and BASE Compact. It's also compatible with all Flasher models. - 1569544: Does the STDC 14 Adapter support SWO trace functionality?***SIMP***Yes, the adapter fully supports Serial Wire Output (SWO) for trace debugging alongside standard JTAG and SWD protocols, maintaining all debugging capabilities of the connected J-Link probe. - 1569546: Can I use Tag-Connect cables with this adapter?***SIMP***Absolutely. The adapter is compatible with Tag-Connect STDC14 cables like the TC2030-CTX-STDC14, allowing connection to Tag-Connect footprints on target boards through the STDC14 interface. - 1569547: What's the difference between the STDC14 and standard ARM 10-pin connectors?***SIMP***STDC14 uses 14 pins at 0.05" pitch versus 10 pins at 0.05" pitch for standard ARM Cortex connectors. Pins 3-12 match the ARM10 pinout, with pins 1-2 reserved and pins 13-14 providing UART signals for Virtual COM port functionality. - 1569549: Is any external power required for the adapter?***SIMP***No, this is a passive adapter requiring no external power. It provides direct electrical connectivity between the 20-pin J-Link connector and 14-pin STDC connector without any active components. - 1569550: What cable length is included with the adapter?***SIMP***The adapter includes a 14-pin ribbon cable. The cable provides flexible routing between the adapter and target system. - 1569551: Can this adapter work with non-STMicroelectronics targets?***SIMP***While designed for STMicroelectronics' STDC14 standard, the adapter will work with any target using the same 14-pin 0.05" connector pinout and electrical specifications. - 1569552: Does the adapter affect debugging performance or speed?***SIMP***No, as a passive adapter it maintains the full debugging performance of the connected J-Link probe, including maximum download speeds up to 4.0 MB/s depending on the J-Link model used. - 1569553: How does STDC14 compare to other debug connector options?***SIMP***STDC14 offers more functionality than standard 10-pin ARM connectors by adding UART signals for Virtual COM port, whilst maintaining the same core debugging pins (3-12) as the ARM10 standard. - 1569554: What's included in the STDC 14 Adapter package?***SIMP***The package includes the STDC 14 Adapter PCB and a 14-pin ribbon cable with IDC connectors. No additional cables or accessories are required for basic operation with J-Link probes.