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User I/O connector

To set up custom input or output signals to your target, use the user Input/Output (I/O) connector.

The user I/O connector is a standard 10-way 2.54mm pitch box header on the rear of DSTREAM-ST.

O connector pinout

Note

When connecting and disconnecting the user I/O port, Arm recommends that all equipment is powered-down.

User I/O pinout table

User I/O pinout table

Pin

Signal name

Pin

Signal name

1

Output 1

2

Output 2

3

Output 3

4

Output 4

5

Output 5

6

Input 1

7

Output 6

8

Input 2

9

3.3V (output)

10

GND

Note

  • User outputs use the 3.3V LVCMOS standard and have a 100R series resistor for short-circuit protection.

  • User inputs use the 3.3V LVCMOS standard and have a 10K series resistor and 100K pull-up resistor. The inputs can be safely driven up to a maximum of 5V.

  • The 3.3V power output can be used to supply external circuitry up to a maximum current of 150mA. If an over-current condition occurs, this power output shuts down until the debug unit is reset.

  • User I/O signals are not currently supported within Arm® Development Studio, although low-speed control might still be possible via ConfigItems and the command-line utilities.

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