20-pin CoreSight (1.27mm) Debug Adapter
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This adapter is used to connect the iC5000 and the iC5700 development system to the Cortex based target. It’s used to connect to the embedded target featuring a 20-pin 1.27mm target debug connector with the ARM CoreSight 20 pinout. Its operating voltage range is 3.3V - 5.0V. Use 20-pin 1.27mm Low Voltage CoreSight Debug Adapter for voltages below this range. Current version was renamed from Cortex Debug Adapter.
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.
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/TMS |
SWD/JTAG |
I/O / O |
|
Ground |
GND |
3 |
4 |
SWCLK/TCK |
SWD/JTAG |
O |
|
Ground |
GND |
5 |
6 |
SWO/TDO |
SWD/JTAG |
I |
|
Not Connected |
KEY |
7 |
8 |
NC/TDI |
Not Connected / JTAG |
O |
|
Ground |
GND |
9 |
10 |
nRESET |
Reset |
I/O |
|
Reference Voltage / Ground |
NC_CAPGND |
11 |
12 |
TRACECLK |
Trace Clock |
I |
|
Reference Voltage / Ground |
NC_CAPGND |
13 |
14 |
TRACEDATA[0] |
Trace Data |
I |
|
Ground |
GND |
15 |
16 |
TRACEDATA[1] |
Trace Data |
I |
|
Ground |
GND |
17 |
18 |
TRACEDATA[2] |
Trace Data |
I |
|
Ground |
GND |
19 |
20 |
TRACEDATA[3] |
Trace Data |
I |
20-pin ARM CoreSight 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. |
The debug adapter features resettable fuses on pins 1, 2, 4, 6, 8 and 10. These protect debug signals against overcurrent and cycle back to a conductive state after the excessive current fades away. Signals on pins 12, 14, 16, 18 and 20 are protected via 100 ohm serial resistors.
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 |
|
|
|---|---|---|---|
|
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. |
