40-pin Samtec to 20-pin ARM Converter
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In conjunction with this 40-pin Samtec ERF8 to 20-pin 2.54 Arm converter delivered in the package, the Active Probe can be connected to the target board featuring a 20-pin 2.54 mm Arm target debug connector providing the JTAG debug interface.
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This converter is required only when the Active Probe is to be connected to the embedded target providing the 20-pin 2.54 mm ARM target debug connector exposing only the debug interface without the Arm HSSTP trace interface. The adapter is delivered along the Active Probe. |
The converter has the following pinout:
Signal Direction |
Signal Description |
Signal |
Pin |
Pin |
Signal |
Signal Description |
Signal Direction |
|---|---|---|---|---|---|---|---|
I |
Reference Voltage |
Vref |
1 |
2 |
Vref |
Reference Voltage |
I |
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 |
TCK/SWCLK |
9 |
10 |
GND |
Ground |
|
I |
Return TCK |
RTCK |
11 |
12 |
GND |
Ground |
|
I |
JTAG |
TDO |
13 |
14 |
GND |
Ground |
|
I/O |
Reset |
nRESET |
15 |
16 |
GND |
Ground |
|
O |
Debug Request |
DBGRQ |
17 |
18 |
GND |
Ground |
|
I |
Debug Acknowledge |
DBACK |
19 |
20 |
GND |
Ground |
|
20-pin Arm pinout
Signal Direction is described from the BlueBox perspective.
