Pinout Specification for MIPI34 Whisker |
 
|
|||||
|
||||||
| ||||||
Pinout
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Signal | Pin | Pin | Signal | ||
|---|---|---|---|---|---|
 | |||||
| VREF-DEBUG | 1 |  |  | 2 | TMS|TMSC|SWDIO |
| GND | 3 | | | 4 | TCK|TCKC|SWCLK |
| GND | 5 | | | 6 | TDO|-|SWO |
| GND (KEY) | 7 |  | | 8 | TDI |
| GND | 9 | | | 10 | RESET- |
 | |||||
MIPI20T connector (debug and trace; optional: serial wire output)
| Signal | Pin | Pin | Signal | ||
|---|---|---|---|---|---|
| |||||
| VREF-DEBUG | 1 | | | 2 | TMS|TMSC|SWDIO |
| GND | 3 | | | 4 | TCK|TCKC|SWCLK |
| GND | 5 | | | 6 | TDO|-|SWO |
| GND (KEY) | 7 | | | 8 | TDI |
| GND | 9 | | | 10 | RESET- |
| GND | 11 | | | 12 | TRACECLK |
| GND | 13 | | | 14 | TRACEDATA[0] |
| GND | 15 | | | 16 | TRACEDATA[1] |
| GND | 17 | | | 18 | TRACEDATA[2] |
| GND | 19 | | | 20 | TRACEDATA[3] |
| |||||
MIPI20D connector (debug only; optional: serial wire output)
| Signal | Pin | Pin | Signal | ||
|---|---|---|---|---|---|
| |||||
| VREF-DEBUG | 1 | | | 2 | TMS|TMSC|SWDIO |
| GND | 3 | | | 4 | TCK|TCKC|SWCLK |
| GND | 5 | | | 6 | TDO|-|SWO |
| GND (KEY) | 7 | | | 8 | TDI |
| GND | 9 | | | 10 | RESET- |
| GND | 11 | | | 12 | RTCK |
| GND | 13 | | | 14 | TRST- PULLDOWN |
| GND | 15 | | | 16 | TRST- |
| GND | 17 | | | 18 | DBGRQ (EMU0) |
| GND | 19 | | | 20 | DBGACK (EMU1) |
| |||||
MIPI34 connector (debug and trace; optional: serial wire output)
| Signal | Pin | Pin | Signal | ||
|---|---|---|---|---|---|
| |||||
| VREF-DEBUG | 1 | | | 2 | TMS|TMSC|SWDIO |
| GND | 3 | | | 4 | TCK|TCKC|SWCLK |
| GND | 5 | | | 6 | TDO|-|SWO |
| GND (KEY) | 7 | | | 8 | TDI |
| GND | 9 | | | 10 | RESET- |
| GND | 11 | | | 12 | RTCK |
| GND | 13 | | | 14 | TRST- PULLDOWN |
| GND | 15 | | | 16 | TRST- |
| GND | 17 | | | 18 | DBGRQ (EMU0) |
| GND | 19 | | | 20 | DBGACK (EMU1) |
| GND | 21 | | | 22 | TRACECLK |
| GND | 23 | | | 24 | TRACEDATA[0] |
| GND | 25 | | | 26 | TRACEDATA[1] |
| GND | 27 | | | 28 | TRACEDATA[2] |
| GND | 29 | | | 30 | TRACEDATA[3] |
| GND | 31 | | | 32 | TRACEEXT |
| GND | 33 | | | 34 | VREF-TRACE |
| |||||
| 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. |
| VREF-DEBUG | from CPU |
Reference voltage. This voltage should indicate the nominal HIGH level 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. With the MPI20T pin-out this is also the reference voltage for the trace pins (TRC). |
| RESET- | to/from CPU |
System Reset Signal. (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. |
| RTCK | from CPU | JTAG Return Clock. (Optional, No pull-up or pull-down is required.) |
| TRST- | to CPU | JTAG Testport Reset (optional).This is an active low signal. A pull-up on the target is recommended. |
| TRST- PULLDOWN | from CPU | Test Reset Pull-Down. Same function as nTRST, but with pull-down resistor on target. This signal is active low and requires a pull-down, if used. However the signal is optional and not recomended. |
| DBGRQ (EMU0) | to CPU | Debug Request (optional). Used with some chips to stop all cores. (Leave open (N/C) if not used) |
| DBGACK (EMU1) | from CPU | Debug Acknowledge (optional) Indicates on some chips, if the cores are running. (Leave open (N/C) if not used) |
| TRC CLK | from CPU |
Trace clock (used with off-chip trace) |
| TRC DATA[3..0] | from CPU |
Trace data (used with off-chip trace) |
| TRC EXT | to/from CPU | Implementation defined trace sideband signal. Normally not used. (Optional and not recomended, Leave open (N/C)) |
| VREF-TRACE | from CPU | Reference voltage for the trace signals (TRC). This voltage should indicate the nominal HIGH level for the trace pins. |
The MIPI34 Whisker can be used directly with three different connectors (MIPI10, MIPI20, MIPI34).
| Connector | Pins | Pitch | Samtec Order No | Description | Dimensions (Samtec) |
|---|---|---|---|---|---|
| MIPI34 | 34 | 0.05" |  FTSH-117-01-L-DV-K | Micro header with keying shroud | FTSH Surface Mount Micro Header |
| MIPI20T / MIPI20D | 20 | 0.05" | FTSH-110-01-L-DV-K | Micro header with keying shroud | FTSH Surface Mount Micro Header |
| MIPI10 | 10 | 0.05" | FTSH-105-01-L-DV-K | Micro header with keying shroud | FTSH Surface Mount Micro Header |
The MIPI34 Whisker supports various interface standards:
Interface type and corresponding pin function can be selected in the debugger GUI.
| JTAG | IEEE 1149.1 | alternate pin function: TMS, TCK, TDO |
| Compact JTAG | IEEE 1149.7 | alternate pin function: TMSC, TCKC, - |
| Serial Wire Debug | CoreSight ARM | alternate pin function: SWDIO, SWCLK, SWO |
Interface type and corresponding pin function can be selected in the debugger GUI.
To connect to a target with a different connector, the following converters can be used:
Picture
Order No.
Probe
|
Copyright © 2026 Lauterbach GmbH, Altlaufstr.40, 85635 Höhenkirchen-Siegertsbrunn, Germany
Impressum
Privacy Policy
The information presented is intended to give overview information only. Changes and technical enhancements or modifications can be made without notice. Report Errors Last generated/modified: 23-Feb-2026 |
