Silicon Laboratories Computer Accessories User Manual

USB Debug Adapter

USB DEBUG ADAPTER USER’S GUIDE

1. Contents

The USB Debug Adapter package contains the following items:

• USB Debug Adapter (USB to Debug Interface) with attached 7” Ribbon Cable

2. USB Debug Adapter Specifications

The USB Debug Adapter provides the interface between the PC’s USB port and the target device’s in-system
debug/programming circuitry. The attached 10-pin DEBUG ribbon cable connects the adapter to the target board
and the target device’s debug interface. The USB Debug Adapter supports both Silicon Laboratories JTAG and C2
debug interfaces. Power is provided to the adapter from the USB connection to the PC. The USB Debug Adapter is
capable of providing power to a circuit board via pin 10 of the DEBUG connector. See the Kit User’s Guide for
instructions on powering a target board from this source. Table 1 shows the pin definitions for the DEBUG ribbon
cable connector.

Notes:

• The USB Debug Adapter requires a target system clock of 32 KHz or greater.

• With the default settings, the USB Debug Adapter can supply up to 100 mA to a target system.

Table 1. USB Debug Adapter DEBUG Connector Pin Descriptions

Pin # Description

1,8 Not Connected

2,3,9 GND (Ground)

4TCK (C2D)

5TMS

6TDO

7TDI (C2CK)

10 USB Power

Figure 1. USB Debug Adapter

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USB Debug Adapter

3. Hardware Setup using a USB Debug Adapter

Connect a target board to a PC running the Silicon Laboratories IDE via the USB Debug Adapter as shown in
Figure 2.

1. Connect the USB Debug Adapter to the JTAG or DEBUG connector on a target board with the 10-pin ribbon
cable.

2. Connect one end of the USB cable to the USB connector on the USB Debug Adapter.

3. Connect the other end of the USB cable to a USB Port on the PC.

4. Connect the AC/DC power adapter to the power jack on the target board, or configure the board to receive
power from the USB Debug Adapter (see Kit User’s Guide for configuration options).

Notes:

•Use the Reset button in the IDE to reset the target when connected using a USB Debug Adapter.

• Remove power from the target board and the USB Debug Adapter before connecting or disconnecting the

ribbon cable from the target board. Connecting or disconnecting the cable when the devices have power can
damage the device and/or the USB Debug Adapter.

• A USB cable is necessary when using the USB Debug Adapter. USB cables are included with the purchase

of microcontroller development kits that include a USB Debug Adapter. However, a USB cable is not
included when purchasing the USB Debug Adapter separately

PC

.

AC/DC

Adapter

Target Board

PWR

MCU

P1.6

Port 2 Port 0

USB

Cable

USB Debug Adapter

USB DEBUG ADAPTER

Silicon Laboratories

StopPower

Run

SILICON LABORATORIES

P3.7RESET

Figure 2. Hardware Setup using a USB Debug Adapter

Port 4Port 3Port 1

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USB Debug Adapter

4. Software Setup using a USB Debug Adapter

The Silicon Laboratories Integrated Development Environment (IDE) along with other software tools are provided
for device development and debugging. The IDE is available for download from the Silicon Laboratories website
and is also available on microcontroller development kit CD-ROMs. Once the IDE has been installed and the hard­ware has been connected as shown in Section 3, follow the steps below to built a project, connect and download to
a target board using the USB Debug Adapter.

1. Select Project
saved project.

2. Before connecting to the target device, several connec­tion options may need to be set. Open the Connection

Options window (shown in Figure 3) by selecting
Options

3. Select USB Debug Adapter in the “Serial Adapter”
section.

4. If more than one adapter is connected, choose the
appropriate serial number from the drop-down list.

5. Check the “Power target after disconnect” if the target
board is currently being powered by the USB Debug
Adapter. The board will remain powered after a software
disconnect by the IDE.

6. Next, the correct “Debug Interface” must be selected.
Check the Debug Interface corresponding to the Silicon
Laboratories device on the target board.

7. Once all the selections are made, click the OK button to
close the window.

8. Click the Connect button in the toolbar or select

Debug

device.

→Connect from the menu to connect to the

→Open Project... to open a previously

→Connection Options... in the IDE menu.

Figure 3. Connection Options

9. Download the project to the target by clicking the
Download Code button in the toolbar.

10. Save the project when finished with the debug session to preserve the current target build configuration,
editor settings and the location of all open debug views. To save the project, select Project→Save Project

As... from the menu. Create a new name for the project and click on Save.

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5. Schematics

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Figure 4. USB Debug Adapter Schematic (page 1)

USB Debug Adapter

Figure 5. USB Debug Adapter Schematic (page 2)

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USB Debug Adapter

CONTACT INFORMATION

Silicon Laboratories Inc.
4635 Boston Lane
Austin, TX 78735
Tel: 1+[phone]
Fax: 1+[phone]
Toll Free: 1+[phone]

Email: [e-mail]
Internet: www.silabs.com

The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.
Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from
the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features
or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, rep­resentation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation conse­quential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to
support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where per­sonal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized ap­plication, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.

Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.

Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.

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