CN101505162A

CN101505162A - Wireless local area network module for mobile terminal

Info

Publication number: CN101505162A
Application number: CNA200810188216XA
Authority: CN
Inventors: 刘彬
Original assignee: BEIJING MOBILEXP TECHNOLOGY Co Ltd
Current assignee: BEIJING MOBILEXP TECHNOLOGY Co Ltd
Priority date: 2007-12-21
Filing date: 2008-12-19
Publication date: 2009-08-12
Also published as: CN101505164B; CN101505167A; CN101505165B; CN101505531A; CN101505163B; CN101505164A; CN101505163A; CN101505176B; CN101505166A; CN101505176A; CN101505165A; CN101505166B; CN101505167B

Abstract

In order to solve the problems of electromagnetic interference and electromagnetic compatibility occurring when WLAN chips are integrated into a module, the invention provides a WLAN module for mobile terminals. The problems of electromagnetic interference and electromagnetic compatibility are eliminated or reduced by reasonably sorting pins. The WLAN module can be widely applied to the mobile terminals.

Description

WLAN module

Technical field

The invention belongs to the hardware technology of mobile communication and wireless transmission, particularly a kind of WLAN module.

Background technology

Mostly the hardware structure of existing portable terminal is each components and parts is directly connected on the mainboard, and WLAN (wireless local area network) (WIFI) chip also is directly to be arranged on the mainboard of portable terminal.The drawback of this set scheme needs to carry out integrated testability after being the WLAN (wireless local area network) chip is connected in mainboard, if the problem of testing out is made amendment, need comprehensively revise mainboard.When on the portable terminal mainboard multiple components and parts being set (this is ubiquitous situation), the test repeatedly of multimode can cause the R﹠D cycle long, the R﹠D costs height.

The inventor thinks, WLAN (wireless local area network) chip and interlock circuit are integrated into the module that can be connected in the portable terminal mainboard, test in the R﹠D process can be that unit carries out with the module, this has just saved R﹠D cycle and R﹠D costs greatly, also highly beneficial for upgrading or personalized customization that module is follow-up, can be to the big influence of the whole generation of portable terminal.

In portable terminal, the WLAN (wireless local area network) chipset is become module, the problem that needs solve be by to the rational layout of the pin of module to weaken or to eliminate electromagnetic interference (EMI) and electromagnetic compatibility (EMC) between each circuit.

Summary of the invention

The electromagnetic interference and the electromagnetic compatibility problem that run into when the WLAN (wireless local area network) chipset being become module in order to solve, the invention provides a kind of WLAN module, reduce or eliminated electromagnetic interference between each pin signal of module by reasonable ordering to pin.

Technical scheme of the present invention is as follows:

WLAN module comprises the package body structure of built-in WLAN (wireless local area network) chip and the pin of packaging body periphery, it is characterized in that, the layout of described pin comprises the following sequence of ordering successively:

Sequence number 1 pin, the ground wire pin is as the ground wire path of described packaging body;

Sequence number 2 pins, radio frequency or antennal interface pin are used to connect the interface of radio circuit or antenna;

Sequence number 3 pins, the WLAN (wireless local area network) module wakes the cpu signal pin up, is used for sending wake-up signal to CPU;

Sequence number 4 pins, WLAN (wireless local area network) module wake-up/interrupt signal pin is used for waking up or interrupt signal to the transmission of WLAN (wireless local area network) module;

Sequence number 5 pins, serial peripheral equipment data output pin is used for serial device dateout to the periphery;

Sequence number 6 pins, secure digital input/output interface, i.e. SDIO interface;

Sequence number 7 pins, bluetooth reception/sending mode signal pin is used for transmitting the signal that the Bluetooth circuit that shows portable terminal is in reception or sending mode;

Sequence number 8 pins, WLAN (wireless local area network) module reception/sending mode signal pin is used to transmit and shows that the WLAN (wireless local area network) module is in and receive or the signal of sending mode;

Sequence number 9 pins, the Bluetooth priority signal pin is used for transmitting the signal of the priority level of the Bluetooth circuit work that shows portable terminal;

Sequence number 10 pins, serial peripheral equipment interrupt signal pin is used to transmit the signal that interrupts serial peripheral equipment;

Sequence number 11 pins, the interface clock signal pin is used for to serial peripheral equipment, SD card transmit clock signal;

Sequence number 12 pins, serial peripheral equipment chip select signal input pin is used for the signal to this equipment of serial peripheral equipment chip input selection;

Sequence number 13 pins, serial peripheral equipment chip data input pin is used for to serial peripheral equipment chip input data;

Sequence number 14 pins start the WIFI3P0 signal pin, and transmission makes the WLAN (wireless local area network) module start the signal of WIFI3P0 function;

Sequence number 15 pins, the 3.3V power pin is to the path of WLAN (wireless local area network) module for 3.3 volts of electricity;

Sequence number 16 pins, the 3.3V power pin is to the path of WLAN (wireless local area network) module for 3.3 volts of electricity;

Sequence number 17 pins, the 1.8V power pin is to the path of WLAN (wireless local area network) module for 1.8 volts of electricity;

Sequence number 18 pins, the 1.8V power pin is to the path of WLAN (wireless local area network) module for 1.8 volts of electricity;

Sequence number 19 pins, the 1.8V power pin is to the path of WLAN (wireless local area network) module for 1.8 volts of electricity;

Sequence number 20 pins, the SDIO/SPI interface pin is used for being connected with serial peripheral equipment or SDIO interface;

Sequence number 21 pins, WLAN (wireless local area network) module reset signal pin is used to transmit WLAN (wireless local area network) module reset signal;

Sequence number 22 pins, the SDIO/SPI interface pin is used for being connected with serial peripheral equipment or SDIO interface;

Sequence number 23 pins, the SDIO/SPI interface pin is used for being connected with serial peripheral equipment or SDIO interface.

Described packaging body is rectangle or square tabular body, and rectangle or foursquare four edges are respectively edge a, edge b, edge c, edge d; Described pin is arranged at the edge of rectangle or square packaging body, and sequence number 1 to sequence number 6 pins are arranged at the same edge a of packaging body; Sequence number 7 to sequence number 10 pins are arranged at the same edge b of packaging body; Sequence number 11 to sequence number 16 pins are arranged at the same edge c of packaging body; Sequence number 17 to sequence number 23 pins are arranged at the same edge d of packaging body.

Technique effect of the present invention:

Technical scheme of the present invention adopts following Several principles to realize purpose of the present invention:

1, nearby principle: other modules beyond pin and the WLAN (wireless local area network) module or the distance of the line between the circuit are short as far as possible, thereby have reduced the risk of the signal of other modules to the interference of this module signal.

2, insulation blocking: on the pin next door of transmitting analog signal ground wire is set and isolates, thereby the mutual electromagnetic that reduces between this pin holding wire and other holding wires is disturbed.

3, power line pin and holding wire pin are directly isolated by ground wire or are increased the electromagnetic interference of avoiding at interval other pin holding wires.

Can concrete pin arrangement be described in detail to illustrate its technique effect in following embodiment part.

Description of drawings

Fig. 1 is the pin layout of WLAN module of the present invention.

Fig. 2 is the circuit theory diagrams of WLAN module of the present invention.

Embodiment

The present invention arranges the problem that can solve electromagnetic interference EMI and electromagnetic compatibility EMC by rational pin.

Below describe technical scheme of the present invention in detail with embodiment shown in Figure 1.The layout of concrete WLAN (wireless local area network) module pin is the form of face as follows.

Below technical meaning that each pin in the last table is arranged describe (sequence number that institute's foundation be described is a number of pins among Fig. 1).

Pin 4 is the pins that are connected with antenna with pin 5, therefore is arranged at the same side of WLAN (wireless local area network) module, can be connected to antenna nearby, in order to avoid a certain pin needs long line to be connected to antenna.Between pin 4 and pin 5, interact, bigger from the distance between visible pin 4 of Fig. 1 and the pin 5, can reduce mutual electromagnetic influence between the two.Pin 3 is a ground path, is arranged on pin 4 next doors and plays the effect of isolation to the electromagnetic interference of pin 4, be i.e. insulation blocking effect.

Pin 7 and pin 8 are digital signals, can not be subjected to electromagnetic interference, also can not produce electromagnetic interference to other circuit, and putting in order of pin 7 and pin 8 can be exchanged.

Pin 9 and pin one 0 play the effect of insulation blocking pin one 1, pin one 2 and pin one 3 as earth connection.Pin one 1, pin one 2 and pin one 3 all are connected to Bluetooth chip, arrange according to these three order of the pins of principle nearby.Pin one 4 transmission of digital signals do not have the problem of electromagnetic interference.

Pin one 5, pin one 7, pin one 9 are the ground wire pin, play the effect of insulation blocking.

Pin two 0, pin two 1, pin two 2 all need to be connected to CPU, and according to nearby principle, these several pins are concentrated and arranged.

Pin two 3, pin two 4 are the power circuits for 3.3V, and pin two 7 is the power circuits that supply 1.8V to pin two 9, and the power circuit of 3.3V and the power circuit of 1.8V need be by the ground wire insulation blockings of pin two 5 and pin two 6.Have the interval of big distance between pin two 3 and the pin two 2, can reduce the electromagnetic interference of power circuit signal line.

Pin 30 puts in order arbitrarily and can not produce the problem of electromagnetic interference to pin 33 equal transmission of digital signals.

Pin 34 is a ground wire to pin 50, and one side is ground connection fully, can increase the bonding strength of module of the present invention and mainboard on the other hand.

Because of WI-FI and bluetooth all are to be operated in industrial frequency range, so WI-FI in the mobile phone and bluetooth will certainly interfere with each other when working simultaneously, so stipulating a kind of coexistence mechanism goes to avoid interfering with each other, wherein pin one 1, pin one 2 and pin one 3 are and the Bluetooth coexistence holding wire, interfere with each other when avoiding bluetooth and WI-FI to use simultaneously by bluetooth and WI-FI chip internal coexistence resolver separately, promptly bluetooth and WI-FI chip can not have signal to pass through above-mentioned pin simultaneously at any time.

Fig. 2 is the circuit theory diagrams of WLAN (wireless local area network) module of the present invention, and label is the number of pins (number of pins in the corresponding diagram 1) of drawing, and the WLAN (wireless local area network) chip model of employing is AW-GH320.

The layout of the pin among the present invention meets nearby principle and insulation blocking principle, effectively weakens or has eliminated electromagnetic interference (EMI) and electromagnetic compatibility (EMC) between each circuit through experiment showed.

Claims

1, WLAN module comprises the package body structure of built-in WLAN (wireless local area network) chip and the pin of packaging body periphery, it is characterized in that, the layout of described pin comprises the following sequence of ordering successively:

Sequence number 23 pins, the SDIO/SPI interface pin is used for being connected with serial peripheral equipment or SDIO interface;

Described pin is arranged at the edge of packaging body by the sequence number sequence arrangement.

2, WLAN module according to claim 1 is characterized in that described packaging body is rectangle or square tabular body, and rectangle or foursquare four edges are respectively edge a, edge b, edge c, edge d; Described pin is arranged at the edge of rectangle or square packaging body, and sequence number 1 to sequence number 6 pins are arranged at the same edge a of packaging body; Sequence number 7 to sequence number 10 pins are arranged at the same edge b of packaging body; Sequence number 11 to sequence number 16 pins are arranged at the same edge c of packaging body; Sequence number 17 to sequence number 23 pins are arranged at the same edge d of packaging body.