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Functional Description and Operation
7
SPRUIE1A–February 2017–Revised August 2017
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XDS110 EnergyTrace™ HDR Debug Probe Add-On
The target power and debug connections are managed through the existing debug and AUX connectors
on the XDS110 Probe. No direct connection between the ETHDR and the debug target exists.
3.2 Basic Setup for the Debug Connection
The presence of the XDS110 ETHDR does not impact the basic debug connectivity of the system, and the
instructions in Section 3.1 of the XDS110 Debug Probe Users Guide (SPRUI94) are still valid.
3.2.1 Probe Supplied Power and ETHDR
The addition of the ETHDR enables the XDS110 Debug Probe to supply current up to 800 mA. No
additional steps are required to support this, and the power configuration steps in Section 3.1.2.2. of the
XDS110 Debug Probe Users Guide (SPRUI94) are still valid.
3.3 Energy Trace HDR
3.3.1 Introduction
When combined with the XDS110 Debug Probe, the XDS110 ETHDR provides an enhanced system that
can be used for measuring the current consumption of the target. These current consumption
measurements can be used to develop power and energy use profiles of the target system. The ETHDR
expands the ET capabilities of the XDS110 Debug Probe, and these may be required for higher current
use cases, or when precise temporal correlation of power transitions is required. Table 1 shows a high
level comparison of the capabilities of the two ET capture types.
Table 1. Base ET and ETHDR Comparison
Capability Base ET on XDS110 Probe ETHDR
Measurement range 500 nA to 100 mA • 1 µA to 120 mA – low current high accuracy
• 1 µA to 800 mA – high current range lower accuracy range
Sampling frequency 2 ksps 256 ksps
Supply ripple Some ripple due to SW DCDC None
3.3.2 Specifications
Other than accuracy and sampling frequency, the specifications for a system utilizing the XDS110 ETHDR
are identical to the ET specifications found in the XDS110 Debug Probe Users Guide (SPRUI94).
3.3.2.1 Accuracy
Table 2 lists the accuracy and range of the ETHDR.
Table 2. ETHDR Measurement Performance
Low Range High Accuracy High Range Low Accuracy
Range Accuracy Range Accuracy
1 µA to 15 µA ±700 nA 1 µA to 70 µA ±3.5 µA
15 µA to 120 mA ±5% 70 µA to 800 mA ±5%
3.3.2.2 Sampling Frequency
The XDS110 ETHDR samples target current consumption a 256k samples per second. Thus, the system
can reliably catch target power transitions that last 10 microseconds or longer.
3.3.3 Hardware Setup
Other than the stacked connection of the XDS110 Probe and the XDS110 ETHDR, the hardware setup is
identical to that which is described in Section 3.1 of the XDS110 Debug Probe Users Guide (SPRUI94).
