10-pin CoreSight to 20-pin ARM Converter
Related to the just described converter IASAM40HSSTP-JTAGSAM, the target development board can also feature a 20-pin 2.54 mm ARM target debug connector instead of the 10-pin 1.27 mm CoreSight. To connect the C part of the IASAM40HSSTP-JTAGSAM to this connector, another converter IA10PINCS20PINARM-1 is required, converting from ARM 20-pin 2.54mm to 10-pin 1.27 CoreSight. The IA10PINCS20PINARM-1 connects to the target and then the āCā point of the IASAM40HSSTP-JTAGSAM connects on top of it.
This converter is required only when the Arm HSSTP II Active Probe is connected to the target providing the 20-pin 2.54 mm Arm target debug connector exposing only the debug interface without the Arm HSSTP trace interface. No trace interface (e.g. SWO, parallel) is supported with this converter. The converter is delivered along the Active Probe.
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 |
NC |
Not Connected |
|
O |
JTAG |
nTRST* |
3 |
4 |
GND |
Ground |
|
O |
JTAG |
TDI |
5 |
6 |
GND |
Ground |
|
I/O |
JTAG/SWD |
TMS/SWDIO |
7 |
8 |
GND |
Ground |
|
O |
JTAG/SWD |
CLK/SWCLK |
9 |
10 |
GND |
Ground |
|
|
Not Connected |
NC |
11 |
12 |
GND |
Ground |
|
I |
JTAG/SWD |
TDO |
13 |
14 |
GND |
Ground |
|
I/O |
Reset |
nRESET |
15 |
16 |
GND |
Ground |
|
|
Not Connected |
NC |
17 |
18 |
GND |
Ground |
|
|
Not Connected |
NC |
19 |
20 |
GND |
Ground |
|
20-pin CoreSight pinout
* nTRST is permanently pulled up
Signal Direction is described from the BlueBox perspective.