ambiq micro Apollo3 Blue EVB Schnellstart-Handbuch - Seite 10

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1. Software Development Tools

Apollo3 Blue EVB Quick Start Guide

4.2

Use of J-Link Adapter as an External Target Board Debugger

The EVB also offers the ability to be used as a J-Link debug adapter for any target board that has an

Apollo family MCU.

Figure 5. Apollo3 Blue EVB's DEBUG OUT Header (J2)

To utilize this functionality, use a 10-pin low-pitch standard debug connector to connect the "DEBUG OUT"

header (J2) on the EVB to the debug header on the target board. The EVB will automatically detect when

the "DEBUG OUT" header is connected to another target board and reconfigure the integrated J-Link to

connect to this external board rather than the on-board Apollo3 Blue.

Note: A voltage on pin 1 of the J2 header is required for the above mentioned automatic switch to occur.

Also, if the target VDD doesn't match the on-board voltage (either 3.3V or 1.8V), and to avoid possible

voltage level conflicts on the debug I/O port, VDDIO of the J-Link processor may need to be changed to the

target voltage by cutting SB5 and shorting SB6.

2018 Ambiq Micro, Inc.

QS-A3B-1p00

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