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1 Solution Overview

1.1 ABSTRACT

TNETW1350/A-based WLAN subsystems (WLS) are intended for inclusion in larger

systems that already contain non-volatile storage (NVS). Because of this, NVS via an

EEPROM is not necessary and not included in TNETW1350/A-based WLSs. In addition,

the TNETW1350/A, by design, does not support a serial EEPROM interface. However,

unique NVS data for each TNETW1350/A-based WLS, such as calibration parameters,

MAC address, etc., is still required. This application note describes how to generate and

store this unique NVS data, how to match specific NVS data files with specific

TNETW1350/A-based WLSs, and how to transfer this NVS data to the NVS of the

complete RG system. This is an EEPROMless solution, as all of these operations are

accomplished without a local EEPROM in the WLS.

1.2 Assumptions

This EEPROMless solution presented in this application note assumes the following:

‧ A residential gateway motherboard and a WLAN subsystem (WLS) daughterboard

make up a complete residential gateway (RG) system.

‧

The two boards are manufactured separately before being assembled into the

complete RG system.

‧ The WLS is calibrated during its separate manufacturing process.

‧

The WLS EEPROM map is referred to as the NVS data file.

‧ The NVS device (flash) is on the RG motherboard.

1.3 Solution Summary

The EEPROMless solution consists of two main parts: the WLS manufacturing test

process and the RG manufacturing process. During the

WLS manufacturing test

process

, the WLS must be calibrated and the NVS data must be saved to an external

binary file. Each unique binary file will be identified with the correct WLS by using the

DIE_ID register value of the TNETW1350/A – this DIE_ID value will be part of the binary

file name.

Note: The DIE_ID register is programmed with a unique 64-bit value (16 Hex characters)

for each TNETW1350/A chip during manufacturing.

During the RG manufacturing process, the correct NVS data file from the WLS

manufacturer must be transferred to the NVS of the complete RG system. This will be

accomplished during the first boot by means of a TFTP server/client model, in which the

server runs on the test PC and the client is part of the APDK running on the complete

RG system. The DIE_ID of the TNETW1350/A will be read, and the TFTP client will

automatically download the correct NVS data file from the server (which has access to

Summary of content (5 pages)

PAGE 1
Solution Overview 1.1 ABSTRACT TNETW1350/A-based WLAN subsystems (WLS) are intended for inclusion in larger systems that already contain non-volatile storage (NVS). Because of this, NVS via an EEPROM is not necessary and not included in TNETW1350/A-based WLSs. In addition, the TNETW1350/A, by design, does not support a serial EEPROM interface. However, unique NVS data for each TNETW1350/A-based WLS, such as calibration parameters, MAC address, etc., is still required.
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the NVS data files). The NVS data file will be validated and stored to a location in the complete RG system NVS. Subsequent boots will not go through this file transfer process, but will load the NVS data directly from the complete RG system NVS. Note: The WLS NVS data file will include the DIE_ID register value for verification purposes. WLS Manufacturing Test Process Summary: 1. Boot the WLS and test system. 2. Calibrate. 3. Save the NVS data file with the proper file name. 4.
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2 Design Applications The TNETW1350A WLS-VQ-HP reference design is an extended-range Wireless LAN subsystem that supports IEEE 802.11b and 802.11g WLAN standards. WCTXXXX/WMTXXXX is referred to as a wireless LAN subsystem (WLS) because it is intended for inclusion in a larger system to enable a complete residential gateway (RG) solution.
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Federal Communication Commission Interference Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
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IMPORTANT NOTE: In the event that these conditions can not be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID can not be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.