TWI418153B - Wireless transmitting chip capable of automatically transmitting wireless signals according to clock signals - Google Patents

Description

Wireless transmitting chip capable of automatically transmitting wireless signals according to clock signals

The invention relates to a wireless transmitting chip, in particular to a wireless transmitting chip capable of automatically transmitting a wireless signal according to a clock signal.

Please refer to FIG. 1 , which is a schematic diagram of a conventional wireless transmitting chip 100 . As shown in FIG. 1, the wireless transmitting chip 100 is coupled to a micro control unit 130, and the micro control unit 130 operates according to its internal program to generate an instruction. The wireless transmitting chip 100 includes a wireless transmitting unit 110, a first clock 120, a state machine 140, and a memory unit 150. The micro control unit 130 includes a second clock 160. The wireless transmitting unit 110 is configured to transmit wireless signals. The first clock 120 is used to generate a first clock signal. The second clock 160 is used to generate a second clock signal. The first clock 120 is a quartz oscillating clock and the second clock 160 is an electronic oscillating clock. The electronic oscillation clock system is formed by combining electronic components such as resistors, capacitors, and inductors according to the required oscillation frequency, and the electronic oscillation clock is saved compared with the quartz oscillation clock. The wireless transmitting chip 100 operates according to the first clock signal during a startup period, and the wireless transmitting chip 100 operates according to the second clock signal during a sleep period, so that the wireless transmitting chip 100 can save power. For example, when the wireless transmitting chip 100 is activated, the wireless transmitting unit 110 transmits a wireless signal. Since the transmitting frequency of the wireless signal needs to be quite accurate, the wireless transmitting chip 100 must operate according to the quartz oscillation clock signal, and when the wireless transmission is performed. When the wafer 100 is dormant, the wireless transmitting unit 110 stops transmitting wireless signals, so the wireless transmitting chip 100 can operate only according to the electronically oscillating clock signal. The state machine 140 is coupled to the micro control unit 130 and the wireless transmitting unit 110 for controlling the wireless transmitting unit 110 to transmit a wireless signal according to an instruction generated by the micro control unit 130. The memory unit 150 is coupled to the wireless transmitting unit 110 for storing data to be transmitted by the wireless transmitting unit 110.

Although the above design can enable the wireless transmitting chip 100 to perform the operations required according to the internal program of the micro control unit 130, the structure of the micro control unit is complicated, and needs to include a central processing unit, a memory unit, a clock, etc., Image state machines are made up of logical components. Conventional wireless transmitting chips are not capable of performing the actions they need to perform independently by the state machine, which increases the application limitations of conventional wireless transmitting chips.

The invention provides a wireless transmitting chip capable of automatically transmitting a wireless signal according to a clock signal, comprising a wireless transmitting unit, a first clock, a second clock, a first state machine, and a second state machine. The wireless transmitting unit is configured to transmit a wireless signal. The first clock is used to generate a first clock signal. The second clock is used to generate a second clock signal. The first state machine is coupled to the first clock and the second clock to generate an instruction according to the first clock signal and the second clock signal. The second state machine is coupled to the first state machine and the wireless transmitting unit for controlling the wireless transmitting unit to transmit a wireless signal according to an instruction generated by the first state machine.

The invention further provides a wireless transmitting method, comprising: an external control unit transmitting an external control signal to a first state machine to set the first state machine; and interrupting a coupling state of the external control unit and the first state machine; The first state machine generates an instruction according to a first clock signal and a second clock signal; and a second state machine controls a wireless transmitting unit to transmit a wireless signal according to the instruction generated by the first state machine.

Compared with the prior art, the wireless transmitting chip of the present invention can automatically transmit a wireless signal according to a clock signal, and does not need to be operated by the control of the micro control unit. Therefore, the design of the wireless transmitting unit can be omitted in the application of the wireless transmitting chip of the present invention.

Please refer to FIG. 2, which is a schematic diagram of the wireless transmitting chip 200 of the present invention. As shown in FIG. 2, the wireless transmitting chip 200 includes a wireless transmitting unit 110, a first clock 120, a second clock 160, a first state machine 230, a second state machine 240, and an input 210. And a memory unit 150. The wireless transmitting unit 110 is configured to transmit wireless signals. The first clock 120 is used to generate a first clock signal. The second clock 160 is used to generate a second clock signal. The first clock 120 is a quartz oscillating clock and the second clock 160 is an electronic oscillating clock. The electronic oscillation clock system is formed by combining electronic components such as resistors, capacitors, and inductors according to the required oscillation frequency, and the electronic oscillation clock is saved compared with the quartz oscillation clock. The wireless transmitting chip 200 operates according to the first clock signal during a startup period, and the wireless transmitting chip 200 operates according to the second clock signal during a sleep period, so that the wireless transmitting chip 200 can save power. For example, when the wireless transmitting chip 200 is activated, the wireless transmitting unit 110 transmits a wireless signal. Since the transmitting frequency of the wireless signal needs to be quite accurate, the wireless transmitting chip 200 must operate according to the quartz oscillation clock signal, and when the wireless transmission is performed. When the chip 200 is dormant, the wireless transmitting unit 110 stops transmitting the wireless signal, so the wireless transmitting chip 200 can operate only according to the electronically oscillating clock signal.

Different from the prior art, the wireless transmitting chip 200 of the present invention does not have to be operated by the control of the micro control unit. The wireless transmitting chip 200 of the present invention performs the operations it needs to perform by the first state machine 230 and the second state machine 240. The first state machine 230 is coupled to the first clock 120, the second clock 160, and the input 210. The first state machine 230 receives an external control signal from an external control unit 220 via the input terminal 210. The external control signal of the external control unit 220 is used to set the state flow of the first state machine 230 so that the first state machine 230 can change its state according to the first clock signal and the second clock signal and thereby generate an instruction. The first state machine 230 generates an instruction according to the quartz oscillation clock signal when in the startup state, and generates an instruction according to the electronic oscillation clock signal in the sleep state, and when the first state machine 230 is set, the external circuit can be interrupted. The control unit 220 is coupled to the first state machine 230 to cause the wireless transmitting chip 200 to operate independently. The second state machine 240 is coupled to the first state machine 230 and the wireless transmitting unit 110 for controlling the wireless transmitting unit 110 to transmit the wireless signal according to the instruction generated by the first state machine 230. The wireless signal transmitted by the wireless transmitting unit 110 corresponds to the data stored by the memory unit 150.

According to the above design, the wireless transmitting chip 200 of the present invention can interrupt the coupling state with the external control unit 220 after the external control unit 220 sets the first state machine 230 and operate independently by itself without having a micro control unit. Although the state machine can perform actions that are simpler than the micro control unit, the wireless transmitting chip 200 of the present invention can easily achieve the functions required by devices such as active wireless tags or wireless sensor keys without including a micro control unit.

In addition, since the electronic oscillation clock signal (ie, the second clock signal) is inaccurate compared to the quartz oscillation clock signal (ie, the first clock signal), the first clock signal can be used every predetermined time. Correct the second clock signal.

Please refer to FIG. 3, which is a flowchart 300 of the wireless transmission method of the present invention. The flow of the wireless transmitting method of the present invention is as follows: Step 310: The external control unit 220 transmits an external control signal to the first state machine 230 to set the first state machine 230; Step 320: Interrupt the external control unit 220 and the first state machine a coupling state of 230; step 330: the first state machine 230 generates an instruction according to the first clock signal and the second clock signal; and step 340: the second state machine 240 controls the wireless transmission according to the instruction generated by the first state machine 230 Unit 110 transmits a wireless signal.

Basically, the achievement of the above results, the steps of the flowchart 300 do not necessarily have to comply with the above sequence, and the steps are not necessarily adjacent, and other steps may also be between the above steps.

Compared with the prior art, the wireless transmitting chip 200 of the present invention can automatically transmit a wireless signal according to a clock signal without performing an action required to be performed according to the micro control unit. Therefore, the application of the wireless transmitting chip 200 of the present invention can eliminate the design of the micro control unit, which not only reduces the size of the application device, but also reduces the limitation on the application of the wireless transmitting chip.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100,200. . . Wireless transmitter chip

110. . . Wireless transmitter unit

120. . . First clock

130. . . Micro control unit

140. . . State machine

150. . . Memory unit

160. . . Second clock

210. . . Input

220. . . External control unit

230. . . First state machine

240. . . Second state machine

300. . . flow chart

310 to 340. . . step

Figure 1 is a schematic diagram of a conventional wireless transmitting wafer.

Figure 2 is a schematic diagram of a wireless transmitting wafer of the present invention.

Figure 3 is a flow chart of the wireless transmitting method of the present invention.

200. . . Wireless transmitter chip

110. . . Wireless transmitter unit

120. . . First clock

150. . . Memory unit

160. . . Second clock

210. . . Input

220. . . External control unit

230. . . First state machine

240. . . Second state machine

Claims (5)

A wireless transmitting chip capable of automatically transmitting a wireless signal according to a clock signal, comprising: a wireless transmitting unit for transmitting a wireless signal; a first clock for generating a first clock signal; and a second clock, For generating a second clock signal, a first state machine coupled to the first clock and the second clock for generating an instruction according to the first clock signal and the second clock signal; And a second state machine coupled to the first state machine and the wireless transmitting unit, configured to control the wireless transmitting unit to transmit a wireless signal according to the instruction generated by the first state machine; wherein the first clock system is a a quartz oscillation clock, wherein the second clock system is an electronic oscillation clock; wherein the first state machine generates an instruction according to the quartz oscillation clock signal when in an activated state, and according to the electron in a sleep state The oscillating clock signal generates an instruction. The wireless transmitting chip of claim 1, further comprising an input for receiving an external control signal. The wireless transmitting chip of claim 1, further comprising a memory unit for storing data to be transmitted by the wireless transmitting unit. A wireless transmission method comprising: An external control unit transmits an external control signal to a first state machine to set the first state machine; interrupts a coupling state of the external control unit with the first state machine; the first state machine is based on a first clock And a second clock signal generating command; and a second state machine controlling a wireless transmitting unit to transmit a wireless signal according to the instruction generated by the first state machine; wherein the first clock signal is a quartz oscillation clock signal The second clock signal is an electronic oscillation clock signal; wherein the first state machine generates an instruction according to the quartz oscillation clock signal in an activated state, and according to the electronic oscillation in a sleep state The clock signal generates an instruction. The wireless transmission method of claim 4, further comprising correcting the electronic oscillation clock signal according to the quartz oscillation clock signal.