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

Rev. 0.1 8/06 Copyright © 2006 by Silicon Laboratories USB Debug Adapter

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

2 Rev. 0.1