SEGGER Microcontroller GmbH
SEGGER STDC 14 Adapter - 20-pin to 14-pin Debug Connector
SEGGER STDC 14 Adapter - 20-pin to 14-pin Debug Connector
SKU: 8.06.39
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Key Features
Overview
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.
Downloads
Why Engineers Choose the SEGGER STDC 14 Adapter - 20-pin to 14-pin Debug Connector
STM32 Development Compatibility
Cost-Effective Probe Extension
Professional Signal Integrity
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
| 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.
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.
| General Information | |
|---|---|
Product Type |
Adapter
|
Part Number (SKU) |
8.06.39
|
Manufacturer |
|
| Physical and Mechanical | |
Weight |
0.02 kg
|
| Other | |
EAN |
5055383602728
|
Questions and Answers
-
What Cable Length Is Included with the Adapter?
The adapter includes a 14-pin ribbon cable for flexible routing between the adapter and target system.
-
Can This Adapter Work with Non-STMicroelectronics Targets?
Yes. Although it's designed for STMicroelectronics' STDC14 standard, the adapter works with any target using the same 14-pin 0.05" connector pinout.
-
Does the Adapter Affect Debugging Performance or Speed?
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.
-
How Does STDC14 Compare to Other Debug Connector Options?
STDC14 adds UART signals for Virtual COM port to the standard 10-pin ARM connector, while keeping the same core debugging pins (3-12) as the ARM10 standard.
-
What's Included in the STDC 14 Adapter Package?
The package includes the STDC 14 Adapter PCB and a 14-pin ribbon cable. No additional cables or accessories are required for basic operation with J-Link probes.
-
What J-Link Models Are Compatible with the STDC 14 Adapter?
SEGGER lists the following J-Link models:
- J-Link Pro PoE
- J-Link Pro
- J-Link ULTRA+
- J-Link WiFi
- J-Link PLUS Classic and PLUS Compact
- J-Link BASE Classic and BASE Compact
It is also listed for Flasher Pro, Pro XL, Compact, ARM, Portable PLUS and Secure.
-
Does the STDC 14 Adapter Support SWO Trace Functionality?
SEGGER does not mention SWO on the STDC14 adapter page. Pin 8 carries the J-Link TDO/SWO signal (SEGGER labels it TDO on the STDC14 pinout), alongside the JTAG and SWD signals (TMS/SWDIO, TCK/SWCLK and TDI).
-
Can I Use Tag-Connect Cables with This Adapter?
SEGGER makes no statement about Tag-Connect cables for this adapter. It provides the standard 14-pin 0.05" STDC14 connector, so check the pinout of any Tag-Connect STDC14 cable, such as the TC2030-CTX-STDC14, against SEGGER's STDC14 pinout before use.
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What's the Difference Between the STDC14 and Standard ARM 10-Pin Connectors?
STDC14 uses 14 pins at 0.05" pitch, while standard ARM Cortex connectors use 10 pins at 0.05" pitch. Pins 3-12 match the ARM10 pinout. On SEGGER's pinout pin 1 is not connected and pin 2 is GND, and pins 13-14 carry UART signals for Virtual COM port functionality.
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Is Any External Power Required for the Adapter?
No. This is a passive adapter with no active components. It connects the 20-pin J-Link connector directly to the 14-pin STDC connector.
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