2.8 Voltage domains of the DSTREAM-ST unit
The DSTREAM-ST unit supports two separate voltage domains to work with debug and trace interfaces
on differing voltage rails.
When using either the CoreSight 20 or ARM JTAG 20 connector, only one voltage domain is supported
and is preset through the VTRef signal from the target.
When using the MICTOR adapter with both debug cables, two voltage domains are supported:
• Debug VTRef.
• Trace VTRef.
If only one of these pins is connected to a valid voltage on the target, it will be used for both debug and
trace signals.
2 ARM
®
DSTREAM-ST target interface connections
2.8 Voltage domains of the DSTREAM-ST unit
ARM 100893_0100_00_en Copyright © 2017 ARM Limited or its affiliates. All rights reserved. 2-36
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