CN102957811B

CN102957811B - Radio frequency subscriber identity module (SIM) card with regular awakening function and implementation method of card

Info

Publication number: CN102957811B
Application number: CN201110255012.5A
Authority: CN
Inventors: 李丹
Original assignee: Beijing CEC Huada Electronic Design Co Ltd
Current assignee: Beijing CEC Huada Electronic Design Co Ltd
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2014-05-07
Anticipated expiration: 2031-08-31
Also published as: CN102957811A

Abstract

The invention relates to a device and a method for regularly awakening a radio frequency subscriber identity module (SIM) card. The device mainly comprises a main control chip, a timer circuit and a radio frequency data communication module. After a system is initialized or ready for radio frequency data communication, the main control chip and the radio frequency data communication module are in dormancy states, the timer circuit produces a regular awakening signal for awakening the main control chip; the main control chip controls the timer circuit to be in a non-working state and awakens the radio frequency data communication module; if radio frequency data exist, data communication is carried out; if the radio frequency data do not exist, the radio frequency data communication module is controlled to be in the dormancy state, and the timer circuit is started; and moreover, the timer circuit enters the dormancy state and waits for awakening at the next time.

Description

A kind of radio-frequency SIM card and implementation method with timing wake-up function

Technical field

The present invention relates to radio-frequency communication field, particularly the radio frequency smart card application based on mobile payment.

Background technology

Along with the universal development of mobile communication equipment, mobile phone has become requisite articles for daily use in a kind of people's interchange, has obtained increasing application.The development of mobile phone is also from original simple call instrument, develop into the information communication function with transmitting-receiving note, again to can download pictures, the multimedia function such as take pictures, and then can surf the Net, send and receive e-mail, carry out the Business Processing such as bank, security, become personal digital assistant device truly, make people more and more be unable to do without mobile phone.Particularly mobile phone, for the research of mobile payment technology, makes the application of mobile phone more wide.Radio frequency S work M card is exactly a kind of technology type of mobile payment.

Because radio-frequency SIM card obtains energy by mobile phone, therefore to reduce as much as possible the energy consumption of radio-frequency SIM card, improve the stand-by time of mobile phone.Common way is to adopt timing wake-up mechanism.

Chinese patent 200810217240.1 discloses a kind of method that adopts software approach to reduce radio-frequency SIM card power consumption, but this patent has just been described a software flow, on hardware, how to adjust the timing wake-up time, particularly when adopting external definition circuit to realize timing wake-up function, how the timing wake-up time is write to external definition circuit, in this patent, all do not have to describe.

Summary of the invention

The invention describes a kind of apparatus and method of low-power consumption timing wake-up radio-frequency SIM card, mainly by main control chip, timer circuit, rf data communication module etc., formed.After system initialization or do not carrying out rf data communication, do not consider the communication of passing through 7816 interfaces and mobile phone when radio-frequency SIM card is used for telecommunications application, main control chip and rf data communication module are in resting state, after timer circuit powers on, produce timing wake-up signal, wake main control chip up, main control chip control timer circuit is in HOLD state, and wake rf data communication module up, received RF data within a certain period of time, if there is rf data, carry out data communication, after communication completes, control rf data communication module and enter resting state, restart timer circuit, and self enters resting state, wait for waking up next time, if within the regular hour, there is not rf data, control rf data communication module and enter resting state, restart timer circuit, and self enter resting state, wait for waking up next time.

Accompanying drawing explanation

Fig. 1: the radio-frequency SIM card structure with timing wake-up function

Fig. 2: timer circuit structure

Fig. 3: the oscillogram of wake-up circuit

Embodiment

Below in conjunction with diagram, the present embodiment is described further.

As shown in Figure 1, described radio-frequency SIM card 100 mainly comprises timer circuit 101, main control chip 102, rf data communication module 103.

Main control chip 102, as the core cpu of described radio-frequency SIM card 100, mainly contains 3 effects:

1) carrying telecommunications COS, 7816 contacts by described radio-frequency SIM card 100 are connected with mobile phone terminal, support telecommunications to apply.

2) be connected with rf data communication module 103 by general Purpose IO Interface (as SPI), complete the operation to rf data communication module 103, as initialization, control it and enter, exit resting state, reception, transmission rf data etc.

3) be connected with timer circuit 101, there is external interrupt wakeup function, and the control signal of output timer circuit 101.Control it and regularly produce interrupt signal, or remain in off position.

Rf data communication module 103 is comprised of the Passive components between radio frequency communication chips, radio-frequency antenna and antenna and chip, under the control of main control chip 102, reception is from the data of main control chip 102, according to relevant radio frequency protocol, carry out data processing, and launch by radio-frequency antenna.Or receive the data from radio-frequency antenna, after protocol processes, send to main control chip 102.

Timer circuit 101 is worked under the control of main control chip 102, and when control signal invalid (high level), timer circuit 101 is started working, and exports wake-up signal after certain hour, wakes main control chip 102 up.When control signal is effectively when (low level), timer circuit 101 quits work, in hold mode.As shown in Figure 2, timer circuit 101 is by capacitance-resistance charge-discharge circuit: resistance 1011 and electric capacity 1012 form, and control signal is by diode 1013 oppositely on the total node of access resistance 1011 and electric capacity 1012.When control signal invalid (high level), diode 1013 oppositely ends, and capacitance-resistance charge-discharge circuit is started working, i.e. capacitor charging.When capacitance voltage reaches certain value, while surpassing the reference voltage of comparator 1016, comparator 1016 output useful signals (low level), wake main control chip 102 up, first main control chip 102 is made as control signal effectively (low level), diode 1013 forward conductions, electric capacity 1012 electric discharges, the voltage that makes electric capacity 1012 two ends is low, simultaneously comparator 1016 output invalid signals (high level).Main control chip 102 is started working, and after work completes, control signal is made as to invalid (high level), and diode 1013 enters reverse state, and capacitance-resistance charge-discharge circuit is started working again.The reference voltage of comparator 1016 obtains by

divider resistance

1014 and 1015.

The working-flow of described timing wake-up radio-frequency SIM card is as follows:

1. mobile phone power-on, after radio-frequency SIM card 100 electrification resets, first main control chip 100 gives timer circuit 101 output invalid signals, and control timer circuit 101 is not worked, and then initialization rf data communication module 103 makes it enter dormancy low power consumpting state.After until mobile phone, to radio-frequency SIM card, 100 initialization complete, before the main control chip 102 of radio-frequency SIM card 100 enters dormancy low-power consumption, first opening timing device circuit 101, makes its work.Suppose not consider to pass through when radio-frequency SIM card 100 is applied for telecommunications the communication of 7816 interfaces and mobile phone, main control chip 102 and rf data communication module 103 are in resting state;

2. after timer circuit 101 work, through certain time delay, produce timing wake-up signal, wake main control chip 102 up.Main control chip 102 enables the control signal (low level) of timer circuit 101, and assurance timer circuit 101 is not worked, and wakes rf data communication module 102 up simultaneously, carries out radio frequency operation;

3. in step 2, if there is rf data, carry out data communication, until whole transaction completes.Then control rf data communication module 103 and enter resting state, and cancel the control signal (high level) of timer circuit 103, restart timer circuit 101, and self enter resting state, wait for waking up next time.

4. in step 2, if within the regular hour, do not receive rf data, main control chip 102 is controlled rf data communication module 103 and is entered resting state, and cancel the control signal (high level) of timer circuit 101, restart timer circuit 101, and self enter resting state, wait for waking up next time.

Fig. 3 has described the timing waveform of several key signals in system work process, in control signal, be between high period, main control chip 102 is in resting state, electric capacity 1012 carries out a charging process, when electric capacity 1012 is charged to certain voltage, by with reference voltage comparison, comparator 1016 output wake-up signals (low level), main control chip 102 is waken up, consider the interrupt response time of main control chip 102, its wakeup process has the regular hour, after being waken up, first control signal is set to effectively (low level), electric capacity discharges rapidly, become low level, and remain low level, the wake-up signal of comparator 1016 outputs becomes height.Main control chip 102 is processed relevant radio frequency operation, enters running status, after having moved, control signal is set to invalid (high level), and electric capacity is by the charging process that starts next round.

Claims

1. a radio-frequency SIM card with timing wake-up function, is characterized in that this radio-frequency SIM card comprises timer circuit module, rf data communication module, main control chip module, wherein:

Main control chip module is connected with mobile phone terminal by 7816 contacts of described radio-frequency SIM card, supports telecommunications application, by general Purpose IO Interface, is connected with rf data communication module, completes the operation to rf data communication module; And be connected with timer circuit module, there is external interrupt wakeup function, export to timer circuit module control signal, control timer circuit module regularly produces interrupt signal, or remains in off position;

Rf data communication module is comprised of the Passive components between radio frequency communication chips, radio-frequency antenna and antenna and chip, under the control of main control chip module, reception is from the data of main control chip, according to relevant radio frequency protocol, carry out data processing, and launch by radio-frequency antenna, or receive the data from radio-frequency antenna, after relevant radio frequency protocol is processed, send to main control chip module;

Timer circuit module is worked under the control of main control chip module, and when control signal is invalid, timer circuit is started working, and exports wake-up signal after certain hour, wakes main control chip up, when control signal is effective, timer circuit module quits work, in hold mode, described timer circuit module is comprised of capacitance-resistance charge-discharge circuit, capacitance-resistance charge-discharge circuit is comprised of resistance and electric capacity, control signal accesses on the total node of resistance and electric capacity by diode reverse, when control signal invalid, diode reverse cut-off, capacitance-resistance charge-discharge circuit is started working, it is capacitor charging, when capacitance voltage surpasses comparator reference voltage, comparator output useful signal, wake main control chip module up, first main control chip module is made as control signal effectively, diode forward conducting, capacitor discharge, the voltage that makes electric capacity two ends is low, the invalid signals of comparator output simultaneously, main control chip module is started working, after work completes, it is invalid that control signal is made as, diode enters reverse state, capacitance-resistance charge-discharge circuit is started working again.

2. a kind of radio-frequency SIM card with timing wake-up function as claimed in claim 1, is characterized in that the reference voltage of described comparator obtains by divider resistance.

3. a kind of radio-frequency SIM card with timing wake-up function as claimed in claim 1, it is characterized in that timer circuit module adopts resistance-capacitance network to form charge-discharge circuit, when capacitor charging arrives certain level, produce wake-up signal, after main control chip wakes up, the electric discharge of main control chip control capacitance, and make electric capacity two ends remain not charged state, until control signal is removed.

4. a kind of radio-frequency SIM card with timing wake-up function as claimed in claim 1, it is characterized in that described capacitance-resistance charge-discharge circuit controls it by main control chip and discharge and recharge, utilize the unilateral conduction of diode, when control end is when being low, capacitor discharge, make electric capacity two ends become low level, and do not charge, make timer circuit module remain on off position; When control end is when being high, diode reverse cut-off, electric capacity starts charging, and timer circuit module is started working.

5. a method for timing wake-up radio-frequency SIM card, is applied in a kind of radio-frequency SIM card with timing wake-up function as claimed in claim 1, it is characterized in that:

(1) after radio-frequency SIM card initialization or when not carrying out rf data communication, and radio-frequency SIM card does not have and mobile phone carries out communication, and now main control chip module and rf data communication module are in resting state;

(2) timer circuit module is when control signal is invalid, through certain time delay, produce timing wake-up signal, wake main control chip up, main control chip enables the control signal of timer circuit module, assurance timer circuit module is not worked, and wakes rf data communication module up simultaneously, carries out radio frequency operation;

(3) in step (2), if there is rf data, carry out data communication, until whole transaction completes, then main control chip module is controlled rf data communication module and is entered resting state, and cancels the control signal of timer circuit module, restarts timer circuit module, and main control chip module enters resting state, wait for waking up of timer circuit module next time;

(4) in step (2), if within the regular hour, do not receive rf data, main control chip module is controlled rf data communication module and is entered resting state, and cancel the control signal of timer circuit, restart timer circuit, and main control chip module enters resting state, wait for waking up of timer circuit module next time.