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.
Figure 2-9 User I/O connector pinout
NoteWhen connecting and disconnecting the user I/O port, Arm recommends that all equipment is powered-down.
User I/O pinout table
Table 2-11 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|
- 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.