Target Adaptation via IDC20A Debug Probe
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Target Adaptation via IDC20A Debug Probe


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Target Connector


Target Connector Type

  • This is a standard 20 pin double row (two rows of 10 pins) connector (pin to pin spacing: 2.54mm/0.100").
  • If terminal strip without shroud is used, the spacing marked with "A" must be a minimum of 30.6mm/1.2".
  • Examples with housing: Samtec HTST-110-01-L-D (through-hole); Samtec HTST-110-01-L-DV (surface mount).
  • Examples without housing: Samtec TSW-110-23-L-D; Berg 67996-120H.
 

Pinout


Arm compatible 20-pin IDC connector with pins on 0.100" centers
Signal

Pin

 Pin

Signal

    
VREF-DEBUG12VSUPPLY (not used)
TRST-34GND
TDI56GND
TMS|TMSC|SWDIO78GND
TCK|TCKC|SWCLK910GND
RTCK1112GND
TDO|-|SWO1314GND
RESET-1516GND
DBGRQ1718GND
DBGACK1920GND
    
Target connector, top-view


Signals

Pin Direction Description
TCK|TCKC|SWCLK to CPU JTAG Clock. It is recommended to put a pull-down to GND on this signal.
TMS to CPU Standard JTAG TMS. It is recommended to put a pull-up to VTREF on this signal for standard 4-pin JTAG.
TMSC to/from CPU Compact JTAG TMSC. Your chip should have a bus-hold on this line for compact JTAG.
SWDIO to/from CPU Serial Wire Debug In/Out
TDI to CPU JTAG TDI. It is recommended to put a pull-up to VTREF on this signal. Only required for standard 4-pin JTAG, optional signal for compact JTAG.
TDO from CPU JTAG TDO. No pull-up or pull-down is required. Only required for standard 4-pin JTAG, optional signal for compact JTAG.
TRST- to CPU JTAG Test Reset (optional). This is an active low signal. A pull-up on the target is recommended.
RTCK
from CPU
 JTAG Return Clock (optional). Available for Arm and a few other architectures. No pull-up or pull-down is required. Leave open (N/C) if not used.
VREF-DEBUG from CPU Reference voltage. This voltage should indicate the nominal HIGH level the for the debug signals (JTAG, cJTAG, SWD). So for example, if your signals have a voltage swing from 0 V ... 3.3 V, the VTREF pin should be connected to 3.3 V.
VSUPPLY from CPU Voltage supply. LAUTERBACH debug probes have their own dedicated power supply. As such, this line is not utilized.
GND to/from CPU Ground. Connect all GND pins to minimize noise interference.
RESET- to/from CPU System Reset (optional). If your target board has a low active CPU reset signal, you can connect this low active reset signal to this pin. This enables the debugger to detect a CPU reset. Furthermore the debugger can drive this pin to GND to hold the CPU in the reset state. The debugger drives this pin as open-drain, so a pull-up is mandatory.
DBGRQ
to CPU
 Debug Request (optional, Arm architecture only). Used with some Arm-based chips to stop all Arm cores. Leave open (N/C) if not used.
DBGACK
from CPU
 Debug Acknowledge (optional, Arm architecture only). Indicates on some Arm-based chips, if the Arm cores are running. Leave open (N/C) if not used.
EVTI (17)
to CPU
 Nexus Event In (optional, ARC architecture only). Only used with DesignWare ARC Trace to force a Nexus Synchronization Message.
EVTO (19)
from CPU
 Nexus Event Out (optional, ARC architecture only). This pin is not used by ARC processors. Leave open (N/C) if not used.

Interface Standards

The Debug Cable supports different interface standards:

1JTAGIEEE 1149.1alternate pin function: TMS, TCK
3Compact JTAGIEEE 1149.7alternate pin function: TMSC, TCKC
2Serial Wire DebugCoreSight Arm®alternate pin function: SWDIO, SWCLK

The interface type and corresponding pin function can be selected in the debuggers GUI.

 

Products


The adaptation applies to the following TRACE32 products:

Order No.Probe
LA-2715Debugger for Nios® II (20 Pin) 
LA-2728Conv. Bundle Intel MIPI60-Cv2 to ARM 20 
LA-2751Debugger for STRED (ICD) 
LA-2757JTAG Debugger for Mico32 (ICD) 
LA-2758Debugger for Meta (ICD) 
LA-2759JTAG Debugger for C7000 DSP (ICD) out of production
LA-3200IDC20A Debug Probe with RISC-V 32-Bit License 
LA-3201IDC20A Debug Probe with RISC-V 64-Bit License 
LA-3208IDC20A Debug Probe with Hexagon License 
LA-3210IDC20A Debug Probe with ARC® License 
LA-3211IDC20A Debug Probe with Xtensa® License 
LA-3222IDC20A Debug Probe with C2000 License 
LA-3224IDC20A Debug Probe with C5400 License 
LA-3225IDC20A Debug Probe with C5500 License 
LA-3226IDC20A Debug Probe with C6000 License 
LA-3227IDC20A Debug Probe with C7000 License 
LA-3250IDC20A Debug Probe with ARM7 License 
LA-3251IDC20A Debug Probe with ARM9 License 
LA-3252IDC20A Debug Probe with ARM11 License 
LA-3253IDC20A Debug Probe with Armv7-A/R License 
LA-3254IDC20A Debug Probe with Cortex-M License 
LA-3255IDC20A Debug Probe with Armv8/v9-A/R License 
LA-3259IDC20A Debug Probe with XScale License 
LA-3260IDC20A Debug Probe with MicroBlaze License 
LA-3261IDC20A Debug Probe with SPARC-V8 License new product
LA-3268IDC20A Debug Probe with ASIP License 
LA-3712JTAG Debugger for ZSP500 DSP Core (ICD) 
LA-3741JTAG Debugger for Hexagon Core (ICD) out of production
LA-3747JTAG/SPI Debugger for UBI32 
LA-3750JTAG Debugger for ARC (ICD) out of production
LA-3756Debugger for AndesCore™ V3/V2 
LA-3762JTAG Debugger for Xtensa 20 Pin out of production
LA-3774JTAG Debugger for TeakLite III (ICD) 
LA-3793JTAG Debugger for Beyond 
LA-3844JTAG Debugger for TeakLite-4 (ICD) 
LA-7739JTAG Debugger for JANUS (ICD) on request, please contact Lauterbach
LA-7742JTAG Debugger for Arm9 out of production
LA-7744JTAG Debugger for ARM10 (ICD) on request, please contact Lauterbach
LA-7746JTAG Debugger for Arm7 20 Pin Connector (ICD) out of production
LA-7765JTAG Debugger for Arm11 (ICD) out of production
LA-7774JTAG Debugger for Teak/TeakLite JAM 20 (ICD) 
LA-7789JTAG Debugger for OAK/TeakLite SEIB (ICD) 
LA-7830JTAG Debugger for C5500 DSP (ICD) out of production
LA-7831JTAG Debugger for TMS320C5400 DSP (ICD) out of production
LA-7838JTAG Debugger for C6000 DSP (ICD) out of production
LA-7845JTAG Debugger for StarCore 20 Pin (ICD) 
LA-7847JTAG Debugger for C2000 DSP (ICD) out of production
LA-7850JTAG Debugger for R8051XC on request, please contact Lauterbach
LA-7863JTAG Debugger for M8051EW 20 Pins (ICD) 

 

Converter for Smaller Footprint


For board designs requiring a smaller debug connector footprint we recommend to use a 20-pin or 10-pin MIPI connector via one of the following converters:

LA-2729 Converter IDC20A to MIPI-10/20T (Recommended, since easy and robust)
LA-3770 Converter IDC20A to MIPI-10/20D/34 (Use only if you need legacy debug signals RTCK, DBGRQ, DBGACK, TRST-)

Learn more about the differences between the two converters in the Lauterbach knowledge base.

 

Converter


Lauterbach offers converters for adapting to target connectors that differ from the above-shown pinout.
Picture
Order No.
Probe
LA-2101
Adapter Half-Size 20 pin

Adaptation
LA-2720
Converter IDC20A to MIPS-14

Adaptation
LA-2729
Converter IDC20A to MIPI-10/20T

Adaptation
LA-2731
Converter IDC20A to STM8 4-Pin Connector
LA-2746
Converter IDC20A/MIPI-20 to 10-pin ECU14

Adaptation
LA-2764
Converter IDC20A to RISC-V SiFive PMOD12 fem

Adaptation
LA-2765
Converter IDC20A to RISC-V SiFive PMOD12 male

Adaptation
LA-2770
Converter IDC20A to MIPI-34 PowerTrace Serial

Adaptation
LA-2788
Converter IDC20A/Samtec-40 HSSTP to RCAR-H3-S
LA-3717
Measuring Adapter IDC20A
LA-3722
Converter IDC20A to Mictor-38

Adaptation
LA-3727
Converter Mictor38/IDC20A to 60 Pin CTOOLS

Adaptation
LA-3728
Converter IDC20A to 60-Pin CTOOLS

Adaptation
LA-3729
Converter IDC20A swap to 60-Pin CTOOLS

Adaptation
LA-3763
Converter IDC20A to XTENSA14

Adaptation
LA-3770
Converter IDC20A to MIPI-10/20D/34

Adaptation
LA-3780
Converter IDC20A to TI-14/TI-20-Compact

Adaptation
LA-3808
Conv. L8540 2xMic38/2xMIPI34/IDC20A to MIPI60
on request, please contact Lauterbach
LA-3809
Converter Mictor-38/IDC20A to MIPI-20T

Adaptation
LA-3812
Conv. OMAP4 2xMic38/IDC20A/MIPI34 to MIPI60
on request, please contact Lauterbach

Adaptation
LA-3818
Converter 2xMictor38/IDC20A to MIPI-60

Adaptation
LA-3821
Converter to enable SHx ASEBRK with IDC20A
on request, please contact Lauterbach
LA-3833
Conv. IDC20A/Samtec40 HSSTP to Samtec40 HSSTP

Adaptation
LA-3835
Conv. Mictor38/ETM+IDC20A to Mictor-38/RTP
on request, please contact Lauterbach
LA-3842
Converter Mictor-38/IDC20A to MIPI-34
not recommended for new projects

Adaptation
LA-3860
Converter IDC20A to PPC4xx-16
on request, please contact Lauterbach

Adaptation
LA-3862
Converter IDC20A/MIPI-34 to Mictor-38

Adaptation
LA-3863
Converter IDC20A to ALTERA-10/RISCV-10

Adaptation
LA-3864
Converter IDC20A to UBI32-10
LA-3865
Converter IDC20A to 78K0R/16

Adaptation
LA-3866
Converter IDC20A to RL78/14

Adaptation
LA-3880
Conv. ICD20A, MIPI-34, MIPI-60 to 2xMictor-38
on request, please contact Lauterbach
LA-3881
Converter IDC20A to XILINX-14

Adaptation
LA-3886
Converter IDC20A to Digilent PMOD™

Adaptation
LA-3887
Conv. MIPI60/IDC20A to 60 Pin CTOOLS

Adaptation
LA-3890
Converter Beyond to NXP
on request, please contact Lauterbach

Adaptation
LA-3891
Converter IDC20A to 10-pin FlashPro
LA-7662
Adapter Half-Size 10 pin for M32R
LA-7663
Debug Adapter 10 pin for M32R

Adaptation
LA-7747
Converter IDC20A to/from ARM-14
not recommended for new projects

Adaptation
LA-7748
Converter IDC20A to TI-14

Adaptation
LA-7818
Converter IDC20A to H-UDI-14 for SH
LA-7822
Converter IDC20A to Hirose36 for SHx
on request, please contact Lauterbach
LA-7823
Converter IDC20A to Mictor38 for SHx

Adaptation




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Last generated/modified: 31-Mar-2026