Silicon Laboratories EC2 User Manual

RS232 Adapter

RS232 SERIAL ADAPTER (EC2) USER’S GUIDE

1. Contents

The RS232 Serial Adapter (EC2) package contains the following items:

• RS232 Serial Adapter (RS232 to Debug Interface)

• 7” Ribbon Cable

2. RS232 Serial Adapter (EC2)

The RS232 Serial Adapter provides the interface between the PC’s RS232 serial port and the target device’s in­system debug/programming circuitry. The included 10-pin DEBUG ribbon cable connects the adapter to the target
board and the target device’s debug interface. The Serial Adapter supports both Silicon Laboratories JTAG and C2
debug interfaces. RS232 Serial Adapters can be powered from the target board, but they cannot provide power to
the target board. Table 1 shows the pin definitions for the DEBUG ribbon cable connector.

Notes:

 When powering the RS232 Serial Adapter via the DEBUG connector, the input voltage to the DEBUG

connector’s power pin must be 3.0 to 3.6 VDC. Otherwise, the Serial Adapter must be powered directly by
connecting the ac/dc adapter to the Serial Adapter’s dc power jack.

 The RS232 Serial Adapter requires a target system clock of 32 kHz or greater.

Table 1. RS232 Serial Adapter DEBUG Connector Pin Descriptions

DEBUG connector

Pin # Description

1 3.0 to 3.6 VDC Input

2, 3, 9 GND (Ground)

4TCK (C2D)

5TMS

6TDO

7TDI (C2CK)

8,10 Not Connected

Figure 1. RS232 Serial Adapter Connectors

Rev. 0.1 8/06 Copyright © 2006 by Silicon Laboratories RS232 Adapter

RS232 Adapter

3. Hardware Setup using a RS232 Serial Adapter

Connect a target board to a PC running the Silicon Laboratories IDE via the RS232 Serial Adapter (EC2) as shown
in Figure 2.

1. Connect one end of a RS232 serial cable to a Serial (COM) Port on the PC.

2. Connect the other end of the RS232 serial cable to the DB-9 connector on the RS232 Serial Adapter.

3. Connect one end of the 10-pin ribbon cable to the RS232 Serial Adapter’s DEBUG header.

4. Connect the other end of the ribbon cable to the target board at the DEBUG or JTAG connector.

5.

Connect a ac/dc power adapter to the power jack on the target board

Notes:

•Use the Reset button in the IDE to reset the target when connected using an RS232 Serial Adapter.

• Remove power from the target board and the

RS232

Serial 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

RS232

Serial Adapter.

• A RS232 Serial Cable is necessary when using the RS232 Serial Adapter. Serial cables are not included
with the purchase of the RS232 Serial Adapter.

.

PC

.

AC/DC

Adapter

Target Board

Serial Cable

Serial Adapter

SERIAL ADAPTER EC2

7V – 9VDC

SILICON LABORATORIES

RS232

Ribbon

Cable

JTAG

PWR

STOP

RUN/

P3.7RESET

PWR

SILICON LABORATORIES

MCU

P1.6

Port 2 Port 0

Figure 2. Hardware Setup using an RS232 Serial Adapter (EC2)

Port 4Port 3Port 1

2 Rev. 0.1

RS232 Adapter

4. Software Setup using a RS232 Serial 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 Serial Adapter.

1. Select Project

saved project.

2. Before connecting to the target device, several connec-

tion options may need to be set. Open the Connection

Options window (shown in Figure 3) by selecting
Options

3. Select RS232 Serial Adapter

Adapter” section.

4. Choose the correct COM Port from the drop-down list and

select the desired Baud Rate.

5. Next, the correct “Debug Interface” must be selected.

Check the Debug Interface corresponding to the Silicon
Laboratories device on the target board.

6. Once all the selections are made, click the OK button to

close the window.

7. Click the Connect button in the toolbar or select

Debug

device.

8. Download the project to the target by clicking the

Download Code button in the toolbar.

→Connect from the menu to connect to the

→Open Project... to open a previously

→Connection Options... in the IDE menu.

(EC2)

in the “Serial

9. 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
from the menu. Create a new name for the project and
click on Save.

→Save Project As...

Rev. 0.1 3

Figure 3. Connection Options

RS232 Adapter

5. Schematic

4 Rev. 0.1

Figure 4. RS232 Serial Adapter (EC2) Schematic

NOTES:

RS232 Adapter

Rev. 0.1 5

RS232 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.

6 Rev. 0.1

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