WLAN/WiFi Access Point

Wireless Access Point System Solutions from Texas Instruments


Wireless Access Point System

Wireless Access Point System shows a portable wireless sensor module (PWSM) with low frequency (LF) wake up function, data communication over Sub 1GHz Band and LF wireless rechargeable.

A typical task of the PWSM is capture data from different sensors over a long period by a LF wake up interrupt start to transmit the stored data to a CC430F6147 wireless access point system (WAPS). That means the LF wake up control the date when the transfer of sensor data start. This may occur depending on the customer application several times a day. The standard control function of PWSM is carried out by LF signal.

LF wake up can be done by a LF reader or WAPS. Depending of the LF antenna type the distance between LF reader or WAPS and PWSM can be up to 4m (13 feet).

PWSM can be used depending on the battery size long periods, without recharging.

Even the LF wireless battery charge was done with the LF reader or WAPS (charging station). For battery recharging we send out a 134.2 kHz CW signal on the charging station. In the LF wireless battery recharging mode should be placed the PWSM at the distance of about 20 mm (0.787 in) from the charging station.

During the recharging process can be transmit data and start firmware update (BSL) over Sub 1GHz Band.

RF430F5978 combines a CC430F6137 ultra-low-power microcontroller system-on-chip with integrated sub 1GHz transceiver cores consists of several devices featuring different sets of peripherals targeted for a wide range of applications. The architecture, combined with five low-power modes, is optimized to achieve extended battery life in portable measurement applications. The device features the powerful MSP430™ 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency. The RF430F5978 provides a tight integration between the microcontroller core, its peripherals, software, and the RF transceiver, making these true system-on-chip solutions easy to use as well as improving performance.

Power Management device TPS62175 regulated the input LF antenna voltage 4.75V-28V to step down to input voltage 5.0V for battery charger device BQ24040. BQ24040 is a high integrated Li-Ion and Li-Pol linear charger device. The BQ24040 managed the recharge process of the LI-Ion battery. VDD voltage of RF430F5978 is controlled by TPS71401 for power up and guaranteed system operation, but the TPS62238 controlled the VDD voltage in active and Sleep mode.

Technical documents

Application notes & user guides

Application Notes (2)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 07 Sep 2012 220
HTM 8 KB 06 Oct 2010 2389

Product bulletin & white papers

Product Bulletin (1)

Title Abstract Type Size (MB) Date Views
PDF 398 KB 03 May 2010 120

White Papers (2)

Title Abstract Type Size (MB) Date Views
PDF 106 KB 13 Mar 2014 266
PDF 1.45 MB 20 Feb 2014 164

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