20-pin Cortex SWD + Trace (1.27mm) Debug Adapter
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This debug adapter has been introduced to connect the iC5000 and the iC5700 development system to the Hilscher NXHX 90-JTAG Board based on Hilscher NETX90 microcontroller. It’s used to connect to the embedded target featuring a 20-pin 1.27mm target debug connector with the Arm Cortex SWD + Trace 20 pinout. Its operating voltage range is 3.3V - 5.0V.
The debug adapter connects to the 25 cm 40-pin ribbon cable coming from the BlueBox and to the target debug connector on the other side.
Specific to the aforementioned Hilscher Board is that only the SWD debug interface can be used. The Board has trace clock (output from the CPU) signal for some reason additionally routed to the JTAG TDI pin on the target debug connector. To prevent signal collision, the TDI is not connected on the debug adapter side and consequentially only the SWD debug interface is supported.
The following pinout is valid on the target side:
Signal Direction |
Signal Description |
Signal |
Pin |
Pin |
Signal |
Signal Description |
Signal Direction |
|---|---|---|---|---|---|---|---|
I |
Reference Voltage |
Vref |
1 |
2 |
SWDIO |
SWD IO |
I/O |
|
Ground |
GND |
3 |
4 |
SWCLK |
SWD Clock |
O |
|
Ground |
GND |
5 |
6 |
SWO |
SWD |
I |
|
Not Connected |
KEY |
7 |
8 |
NC |
Not Connected |
|
|
Ground |
GND |
9 |
10 |
nRESET |
Reset |
I/O |
|
Reference Voltage/Ground |
NC_CAPGND |
11 |
12 |
TRCLK |
Trace Clock |
I |
|
Reference Voltage/Ground |
NC_CAPGND |
13 |
14 |
TRD0 |
Trace Data |
I |
|
Ground |
GND |
15 |
16 |
TRD1 |
Trace Data |
I |
|
Ground |
GND |
17 |
18 |
TRD2 |
Trace Data |
I |
|
Ground |
GND |
19 |
20 |
TRD3 |
Trace Data |
I |
Arm Cortex SWD + Trace 20 pinout
Blue colored signals are parallel trace signals.
Signal Direction is described from the BlueBox perspective.
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When initially connecting the BlueBox to a target, ensure the debug adapter pinout matches the Target connector to avoid potential hardware failure. |
20-pin 1.27mm connectors
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The debug adapter connects to the target through one of the two 20-pin 1.27mm connectors. Note that only one is to be connected to the target! |
Strain relief
The robust connector (Samtec FFSD-05-01-N-SR) is located at the end of the cable and is the recommended connection connector. It's a bit wider and therefore the target must have a matching part populated. Matching part on the target side is e.g. Samtec ESHF-105-01-L-D (full frame connector) or Samtec FTSH-105-01-F-DV-K (connector without the frame at the side).
Standard type
The second connector (Samtec FFSD-05-01-N) is 1cm away from the first one toward the BlueBox (Samtec FFSD-05-01-N). It’s much less robust and is prone to fail if the cable is not handled cautiously or just connected/disconnected too many times. This connector should be used when the target doesn’t provide the matching target connector for the Strain relief type connector. Matching part on the target is Samtec SHF-105-01-L-D or Samtec FTSH-105-01-F-DV-K (connector without the frame at the side).
For the target side connector it’s most convenient to use the FTSH-105-01-F-DV-K connector since it matches the connector with and without the Strain relief option.
Target connector |
|
|
|
|---|---|---|---|
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Robust and less prone to fail |
× |
✓ |
 |
With frame without strain relief (SHF-1xx-01-L-D) |
✓ |
× |
 |
Without frame (FTSH-1xx-01-L-DV) |
✓ |
✓ |
 |
With frame with strain relief (ESHF-1xx-01-L-D) |
✓ |
✓ |
Additional cable
If the 20-pin 1.27mm pitch ribbon cable gets damaged, it can be ordered as a spare part under ordering codes:
•IA20PIN20PIN127
•IA20PIN20PIN127-CUST - Custom cable length must be specified at the order.
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Note that the optional length should be reasonable (e.g. 10 cm) since the quality of electrical signals degrades with prolonging the cable. |
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BlueBox functionality with this cable, intended for rare situations when the standard debug adapter cannot connect to the target due to physical obstacles, is not guaranteed. Using the BlueBox at lower debug frequency scan speeds without trace functionality may be an acceptable compromise. You should test the BlueBox with a custom-length ribbon cable to ensure compatibility with winIDEA. |
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Make sure this adapter fits on your target connector - check Cross Table. |
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Refer to Hardware Setup and Configuration Tutorial to get more information on how to connect the hardware. |
