Introduction - Segger J-Link User Manual

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13.1

Introduction

With RTT it is possible to output information from the target microcontroller as well as
sending input to the application at a very high speed without affecting the target's real
time behavior.
SEGGER RTT can be used with any J-Link model and any supported target processor which
allows background memory access, which are Cortex-M and RX targets.
RTT supports multiple channels in both directions, up to the host and down to the target,
which can be used for different purposes and provide the most possible freedom to the user.
The default implementation uses one channel per direction, which are meant for printable
terminal input and output. With the J-Link RTT Viewer this channel can be used for multiple
"virtual" terminals, allowing to print to multiple windows (e.g. one for standard output, one
for error output, one for debugging output) with just one target buffer. An additional up (to
host) channel can for example be used to send profiling or event tracing data.
J-Link / J-Trace (UM08001)
CHAPTER 13
© 2004-2017 SEGGER Microcontroller GmbH & Co. KG
Introduction