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SEGGER Microcontroller GmbH

SEGGER 0.1" To 50-mil 10-Pin Patch Adapter

SEGGER 0.1" To 50-mil 10-Pin Patch Adapter

Adapts standard 20-pin 0.1" JTAG connector to 10-pin 0.05" Cortex-M with custom wiring capability.

SKU: 8.06.28

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Key Features

Customisable pin mapping
Standard 20-pin to 10-pin conversion
Complete ready-to-use kit
Broad J-Link compatibility
SWD and JTAG support
Compact, robust design
Ideal for legacy and custom targets

Overview

The SEGGER 50-Mil 10-Pin Patch Adapter provides seamless connectivity between standard 20-pin 0.1" JTAG connectors and compact 10-pin 0.05" Cortex-M connectors. This versatile adapter serves both standard Cortex-M applications and non-standard pinout configurations, offering engineers complete flexibility in their debugging and programming workflows.
Package includes adapter board, 10 jumper wires, and 0.05" 10-pin ribbon cable for immediate use.
The adapter's unique patch capability allows custom connections between the 20-pin and 10-pin sides using the included jumper wires, making it invaluable for legacy designs or proprietary pin configurations. Compatible with all SEGGER J-Link and Flasher products, it eliminates the need for multiple specialised adapters. For complementary solutions, explore our 9-Pin Cortex-M Adapter and Programming Voltage Adapter for comprehensive debugging capabilities.

Space Optimisation

Enables compact 10-pin connectors on small PCBs where 20-pin won't fit

Legacy Support

Provides custom wiring flexibility for older designs with non-standard pinouts

Cost Efficiency

Eliminates need for multiple specialised adapters with one versatile solution

Technical Overview

The SEGGER 50-Mil 10-Pin Patch Adapter bridges the gap between traditional 20-pin JTAG interfaces and modern compact 10-pin Cortex-M connectors. This professional-grade adapter serves dual purposes: standard Cortex-M connectivity and custom pin mapping for legacy or proprietary designs.

Connector Specifications

Side Connector Type Pin Count Pitch Compatible With
Input 20-pin IDC Socket 20 0.1" (2.54mm) Standard JTAG debuggers
Output 10-pin Header 10 0.05" (1.27mm) ARM Cortex-M targets

Standard Cortex-M Pinout

When used with the included ribbon cable, the adapter follows ARM's standard 10-pin Cortex-M debug connector specification:

Pin Signal Pin Signal
1 VTref 2 SWDIO/TMS
3 GND 4 SWCLK/TCK
5 GND 6 SWO/TDO
7 KEY (No pin) 8 NC/TDI
9 GND 10 nRESET
Note: Pin 7 is keyed (no physical pin) to prevent incorrect insertion of the connector.

Custom Wiring Quick-Start

For non-standard pinouts, replace the ribbon cable with individual jumper wires:

  1. Disconnect the ribbon cable from the 10-pin header side
  2. Identify target pinout from your PCB documentation
  3. Connect jumper wires between 20-pin test points and 10-pin header pins
  4. Verify connections with multimeter before powering target
Essential Connections: At minimum, connect VTref, GND, SWCLK, and SWDIO for SWD operation. Add nRESET for full debug control.

Compatible Debug Probes

This adapter works with any debug probe featuring a standard 20-pin 0.1" JTAG connector:

  • SEGGER: J-Link BASE, PLUS, PRO, ULTRA+, WiFi, Flasher series
  • STMicroelectronics: ST-LINK/V2, ST-LINK/V3SET
  • P&E Micro: Multilink Universal, Cyclone ARM
  • ARM: ULINK2, ULINKplus (with adapter)

PCB Layout Considerations

When designing PCBs for 10-pin debug connectors:

Parameter Recommendation Notes
Connector Type Samtec FTSH-105-01-L-DV Shrouded, surface mount
Keep-out Zone 3mm all sides For connector and cable clearance
Via Size 0.2mm drill min Standard PCB manufacturing
Trace Width 0.1mm minimum For high-speed signals
PCB layout example showing optimal 10-pin debug connector placement with keep-out zones

Signal Integrity Guidelines

For reliable high-speed debugging:

  • Cable Length: Keep total cable length under 30cm
  • Ground Planes: Use solid ground planes under debug traces
  • Impedance: Match 50Ω characteristic impedance for clock signals
  • Termination: Add series termination resistors if signal integrity issues occur

Troubleshooting Common Issues

Symptom Possible Cause Solution
No target detection VTref not connected Verify pin 1 connection to target VCC
Intermittent connection Poor jumper wire contact Check all jumper wire connections
High-speed programming fails Cable too long Reduce total cable length
Cannot reset target nRESET not connected Connect pin 10 to target reset

Application Examples

Space-Constrained IoT Devices

Modern IoT devices often cannot accommodate 20-pin connectors. This adapter enables the use of compact 10-pin connectors while maintaining compatibility with existing JTAG tools.

Legacy System Integration

When working with older designs that use non-standard debug pinouts, the custom wiring capability allows connection without PCB modifications.

Production Programming

In manufacturing environments, the compact connector reduces fixture complexity while maintaining programming speed and reliability.

Professional Tip: Document custom wiring configurations in your project files. Create a simple wiring diagram showing the jumper wire connections for future reference.

Frequently Asked Questions

Have a Question?

Ask a Question
  • How does this compare to Tag-Connect solutions for space-saving

    While Tag-Connect eliminates connectors entirely using spring pins, this adapter provides a more permanent connection solution with standard connectors that many engineers prefer for reliability.

  • What connectors are compatible on the target side?

    The 10-pin side uses standard 0.05" (1.27mm) pitch connectors. Compatible target connectors include Samtec FTSH series and equivalent 2x5 0.05" shrouded headers.

  • Does this work with automotive-grade debugging applications?

    Yes, the adapter meets professional standards for automotive and industrial applications. It's commonly used in ECU programming and embedded automotive development workflows.

  • Can this adapter handle 3.3V and 5V target voltages?

    The adapter is voltage-transparent and works with any target voltage supported by your debug probe. Most modern applications use 3.3V, but 1.8V and 5V targets are also supported.

  • What's the maximum cable length I can use with this adapter?

    The included ribbon cable is optimised for signal integrity. For longer connections, keep cables under 30cm for reliable high-speed debugging to maintain signal quality.

  • Is this compatible with SWD (Serial Wire Debug) interface?

    Yes, the adapter supports both JTAG and SWD protocols when used with compatible debug probes. SWD requires only 4 connections: VCC, GND, SWCLK, and SWDIO.

  • How do I wire custom pinouts using the jumper wires?

    Remove the standard ribbon cable and use the individual jumper wires to connect pins according to your target's specific pinout. The adapter provides clearly marked connection points for both the 20-pin and 10-pin sides.

  • What's included in the package?

    The complete package includes the adapter board, 10 individual jumper wires for custom connections, and a 0.05" 10-pin ribbon cable. No additional cables or components are required.

  • Can I use this adapter with non-SEGGER debug probes?

    Yes, any debug probe with a standard 20-pin 0.1" JTAG connector can work with this adapter. It's commonly used with ST-LINK, P&E Micro, and other industry-standard debuggers.

  • What's the difference between this adapter and SEGGER's other Cortex-M adapters?

    This patch adapter uniquely includes jumper wires for custom pin mapping, while standard adapters like the 9-Pin and 19-Pin Cortex-M adapters have fixed pinouts. The patch adapter works with both standard Cortex-M and non-standard design

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