Multi-Core Debugging; How Multi-Core Debugging Works - Segger J-Link User Manual

5.5

Multi-core debugging

J-Link / J-Trace is able to debug multiple cores on one target system connected to the
same scan chain. Configuring and using this feature is described in this section.
5.5.1

How multi-core debugging works

Multi-core debugging requires multiple debuggers or multiple instances of the same
debugger. Two or more debuggers can use the same J-Link / J-Trace simultaneously.
Configuring a debugger to work with a core in a multi-core environment does not
require special settings. All that is required is proper setup of the scan chain for each
debugger. This enables J-Link / J-Trace to debug more than one core on a target at
the same time.
The following figure shows a host, debugging two ARM cores with two instances of
the same debugger.
Both debuggers share the same physical connection. The core to debug is selected
through the JTAG-settings as described below.
J-Link / J-Trace (UM08001)
Host (PC)
Debugger
Instance 1
USB
J-Link
JTAG
ARM1
Target hardware
Debugger
Instance 2
ARM2
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