LS RESEARCH TiWi User manual

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TIWI TRANSCEIVER MODULE
User’s Guide
Last updated
Saturday, October 23, 2010

TIWI TRANSCEIVER MODULES
USER’S GUIDE
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Table of Contents
1Introduction .....................................................................................................................3
1.1Purpose & Scope.......................................................................................................................3
1.2Audience....................................................................................................................................3
1.3Applicable Documents...............................................................................................................3
1.4Revision History.........................................................................................................................3
2Quick Start.......................................................................................................................4
2.1Software.....................................................................................................................................4
2.2Hardware...................................................................................................................................8
2.3WLAN Test Software Operation..............................................................................................12
2.4Evaluation Board Schematics and Bill of Material...................................................................30
3EMC Compliance Application Guide...........................................................................31
3.1Introduction..............................................................................................................................31
3.2Module Integration Considerations – Antenna Systems.........................................................31
3.3Module Integration Considerations – Circuit Implementation..................................................31
3.4Module Integration Considerations - Top Assembly Considerations. .....................................32
3.5Module Integration Considerations – Firmware.......................................................................32
3.6Testing Requirements for End-Product...................................................................................32
3.7Marking Requirements for End-Product..................................................................................32
4Contacting LS Research...............................................................................................35

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1Introduction
1.1 Purpose & Scope
The purpose of this document is to provide details regarding the setup and use of the
TiWi series transceiver module within its companion evaluation board. This document
covers a description of the evaluation board and its features and a brief tutorial on how
to operate the module evaluation board.
Further, this document will also present application guidance such that the module’s
EMC compliance will not be degraded.
1.2 Audience
This document is intended to be read by engineers and technical management. A
general knowledge of common engineering practices is assumed.
1.3 Applicable Documents
•[1] TiWi Datasheet- LS240-WI-01-A20 (LSR)
•[2 ]FCC Test Report # 310117, LS Research, LLC: September 8,2010
•[3] SAR Test Report: FCC ID: TFB-TiWi1-01, RF Exposure Lab, San Marcos, CA:
September, 2010.
•[4] Evaluation Board Schematics
•[5] Ethertronics Presetta 1000423 Antenna Data Sheet.
•[6] LSR 001-0001 Dipole Antenna Data Sheet.
•[7] FCC OET Bulletin 62, “UNDERSTANDING THE FCC REGULATIONS
•FOR COMPUTERS AND OTHER DIGITAL DEVICES”, February 1996.
1.4 Revision History
Date Change Description Revision
10/8/2010 Initial release. 0.0
Table 1 Revision History

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2Quick Start
In this section, the initiation of the evaluation board and sample RF tests will be
discussed. You will learn how to:
•Install TiWi Controller Tool.
•Run the TiWi Controller Tool.
•Set proper path to test firmware: Fw1273r1c_sta_cortex.bin.
•Set proper path to radio parameter file: ini_file.ini.
•Connect to the TiWi LSEVK-WI-01-A20 Evaluation board.
•Download test firmware to the TiWi Module via the LSEVK-WI-01-A20 Evaluation board.
•Configure and Run WLAN Transmitter Tests.
•Configure and Run WLAN Receiver Tests.
•Place device in listen mode and Extremely Low Power Mode (ELP).
2.1 Software
Prior to connecting any hardware to your PC, download and install the latest version
(current download: TIWI Controller 3-22-10.zip) of the TIWI Controller Software. The
installation procedure is as follows:
1. Copy TIWI Controller 3-22-10.zip to a convenient directory and extract the file:
2. Run TIWI Controller.msi, the following installation screens should begin:

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3. Choose Setup Type: Complete
4. Begin the installation by selecting the “Install” button

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5. Upon completion, the following screen should appear and press “Finish”.

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6. Change to the directory: C:\Program Files\LS Research:
7. There are three directories: Drivers, TIWI Controller, and 185_Firmware_ini. The
Drivers directory contains the drivers for USB connection between the PC and
the FTDI USB-serial port circuits on the evaluation board. When a physical
connection of the USB cable between the PC and the evaluation board is made,
it may prompt you for the locations of the necessary drivers. Simply cause the
driver search routine associated with the plug-and-play operation to browse into
the directory C:\Program Files\LS Research\Drivers in order to install the proper
drivers.
8. The Directory TIWI Controller contains the application and its associated support
files.
9. Also note the presence of the 185_Firmware_ini directory. This contains the TiWi
module test firmware and configuration parameters.
10. The TIWI Controller test tool will prompt for the location of the binary test
firmware image (Fw1273r1c_sta_cortex.bin) and parameter file (ini_file.ini),
which is located in the C:\Program Files\LS Research\185_firmware_ini directory.

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This user guide will now introduce the evaluation board hardware such that it is
configured correctly in order connect and operate with the newly installed software.
The operation of the software is presented immediately after the hardware
introduction.
2.2 Hardware
1. Install the software described in the previous section, prior to connecting any hardware
to your PC.
Figure 1 shows the LS Research, LSEVK-WP-01-A2 evaluation board:
Figure 1 TiWi Evaluation Board, LSEVK-WI-01-A20
2. Presented on the Next Page in Figure 2, is an annotated assembly drawing of the board
to provide a clear reference to various features of the evaluation board:

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1
2
3
45
Figure 2 TiWi Evaluation Board, LSEVK-WI-01-A20: Jumper positions(Name)[Selection Options]: 1. Select power source (PWR
SOURCE),[DC,WL,BT], 2. Select VIO source (VIO SOURCE),[EXT,BOARD] 3. Select VBAT Source (VBAT SOURCE),[EXT,BOARD]. 4. BT reset
(holds BT function in reset). 5. FM reset (holds FM in reset).

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3. The jumper positions shown as blue rectangles correspond to the following primary
power supply options:
1J19: PWR SOURCE: The input + 5VDC primary supply voltage for the
interface circuit power supplies and board-derived module power supplies
can be selected from 3 different sources.
•PWR: Apply + 5 VDC to J7 (5V IN).
•WL: Connect to USB + 5 VDC pin, voltage sourced from WLAN USB
port (J5).
•WL: Connect to USB + 5 VDC pin, voltage sourced from BT USB port
(J6).
2J8: VIO SOURCE: The input + 1.8VDC primary supply for the digital
interface circuitry on the module, can be supplied externally (TM1) or from
a regulated 1.8 VDC supply on the board (derived from + 5 VDC input
voltage [USB or external].
•BOARD: Route board-derived 1.8 VDC power supply to module VIO
input.
•EXT: Supply 1.8 VDC power supply to module VIO from external
power supply, e.g. lab supply.
3J9: VBAT SOURCE: The input + 3.6VDC primary supply for the main
analog suppl on the module, can be supplied externally (TM2) or from a
regulated 3.3 VDC supply on the board (derived from + 5 VDC input
voltage [USB or external].
•BOARD: Route board-derived 3.6 VDC power supply to module
VBAT input.
•EXT: Supply 3. 6 VDC (nominal) power supply to module VBAT from
external power supply, e.g. lab supply.

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4J11: BT RESET: Placing a jumper across J11 holds the Bluetooth (BT)
core in reset. This is useful when making ELP current measurements on
the WLAN section of the module. The jumper can be left off, but the BT
core will draw a small amount of operating background current. The BT
core can be manually held in reset by depressing S2. This jumper can be
moved to J10, if holding the WLAN circuit in reset is desired during BT
operations. The WLAN circuitry can be held in reset manually by
depressing S1.
5J12: FM RESET: Placing a jumper across J12 holds the FM circuit in
reset. The FM feature is not currently supported. If FM support is required
or desired, please contact LS Research, for further information. This
circuit should always be held in reset.

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2.3 WLAN Test Software Operation
Assuming that the software has been installed properly per the instructions given in
section 2.1 and that the evaluation board hardware is configured properly per the
instructions given in section 2.2, a set of basic WLAN hardware tests can now be
executed:
1. Connect the supplied USB cable between a USB port on the PC to the WLAN USB
connector on the evaluation kit (J5). Connect a 50 Ohm coaxial cable to SMA
connector (J4) and terminate in the 50 ohm test equipment port appropriate to the
desired measurement (WLAN test set for TX/RX, Spectrum Analyzer for TX, Vector
Signal Analyzer for TX, Vector Signal Generator for RX).
2. If the proper drivers have been installed previously that support the FTDI USB
interface circuit, the plug and play mechanism associated with PC Hardware Device
manager should recognize two serial ports. It is important to note the port number of
the two captured serial ports (there is a low-port and a high-port number). This can
be checked by examining: Control PanelÆSystemÆ(Hardware Tab)ÆDevice
Manager. This should display the presence of two, properly configured serial ports. In
this case the low-port is COM3 and the high-port is COM4. Note the port number of
the low port.

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3. If the plug and play mechanism for the USB serial ports requires a path specification
for the drivers, please specify the path towards: C:\Program Files\LS
Research\Drivers.

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4. The installation process should have placed a short-cut icon that is based on the LS Research logo and is labeled TIWI
Controller. Use the short-cut to start the TIWI Controller Program:

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5. In the Connect / Disconnect Field, ensure that COM Port selection is selected to the low-port number determined through
the use of the Hardware Device Manager.
6. Set the Baud Rate to 921600 bits per second.
7. Set the time out value to 500 mS.
8. Ensure that the FREF clock is set to 38.4 MHz.
9. In the Download Firmware Field, select Firmware path to specify the location of the firmware binary image file:

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10. In the INI file Field, select Browse to specify the path for the location of the ini_file.ini configuration file:

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11. Return to the Connect / Disconnect Field and select the “Press Here to Connect” button:
The connection indicator in the upper left hand corner should change from “Disconnected” and Red to “Connected without
FW” and turn yellow. Also note in the Download Firmware field that an indicator also changes from “Not Connected” to
“Firmware Not Downloaded”…

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12. Now select the “Download Firmware” Button. A firmware downloading progress bar should display the state of
downloading progress. When the downloading process is complete, the device will run the firmware and perform a series
of calibrations. In the Calibration Field, a summary Cal Status should indicate “Pass” and the connection status should
change from “Connected without FW” to “Connected with Firmware” and the indicator in Dowload Firmware Field should
change from “Firmware Not Downloaded”… to “Firmware Running” .

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13. Note on the right hand side of the user interface that the device reports back an estimate of the SoC (system on chip)
temperature and SoC terminal voltage. These quantities are monitored throughout the device operation and are updated
periodically. Note below the Soc voltage is a drop-down selector that can be used to manually change the frequency
channel of the transceiver. The default channel is Channel 7 – 2442 MHz. Next Select the BIP tab (Built-In PLT)
(PLT=Production Line Testing). Set the reference power level to 16 dBm and its associated power detector reference
voltage of 350 mV and select the “Run TX BiP” button. This runs a calibration routine to calibrate the power detector
associated with the transmit (TX) power leveling loop for closed-loop power control (CLPC). No action is required with the
RX BiP.

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14. Upon completion of the BiP CLPC calibration the indication panel should read “Success TX BiP”. At this point the device is
ready to be configured and tested for basic RF performance. Beginning with the TX function, select the TX tab:
15. The various 802.11 b/g/n rates can be selected and the Guard Interval Type (GI). For this example, a 802.11n rate MCS7
(65 Mbps) is selected to operated with long guard interval. Set the payload size (1200 bytes here) and the time duration
(Delay) of the inter-packet idle time (1 msec here). The packet type should be selected as “Continuous”. Preamble types
can be changed in accordance to preamble options offered for each modulation type (b/g/n).