ARM DSTREAM-ST System And Interface Design Reference Manual page 40

Pin Signal
Pin 8 Input 2
Pin 9 +3.3V
Pin 10 GND
USER inputs are not currently supported by the DSTREAM-ST firmware and are reserved for future
use.
ARM 100893_0100_00_en
I/O
Input
Output
-
Note
Copyright © 2017 ARM Limited or its affiliates. All rights reserved.
3 ARM DSTREAM-ST USER Input/Output (IO) connections
®
Table 3-1 USER I/O pin connections (continued)
Description
This is a user input bit. It has a 100K weak pull-up to the unit
internal +3.3V supply, and requires a V
V of 0.8V. It can safely be driven by 5V logic levels, and has
il(max)
Electro Static Discharge (ESD) protection greater than the 2kV
human body model.
This pin is not currently supported by the DSTREAM-ST firmware.
This is intended as a voltage reference for external circuitry and is
current limited to approximately 50mA.
-
Non-Confidential
3.1 About the USER I/O connector pinouts
of 2.0V and a
ih(min)
3-40