TWI469053B - Electronic device and startup method therefore - Google Patents

Description

Electronic device and startup method thereof

The present invention relates to an electronic device startup technology, and more particularly to an electronic device suitable for Power over Ethernet (POE) technology and a startup method thereof.

Ethernet Power over Ethernet (POE) is a relatively novel power supply technology that transmits power and data to corresponding electronic devices over an Ethernet network via twisted pair. Since the Ethernet power supply technology can power the electronic device without modifying the Ethernet cable structure, the electronic equipment using POE technology (for example, a network telephone, a wireless base station, a network camera, Hubs, computers) can be used without additional power outlets, resulting in a relatively low cost of erecting the entire system.

The POE technology is mainly divided into two parts: a Power Sourcing Equipment (PSE) as a power supply terminal and a Powered Device (PD) as a power receiving end. In addition, current Ethernet power technology supports two basic specifications: one is the 802.3af specification (or 802.3at Type 1 specification) that provides less electrical power (eg, 12.95 watts (w)). The other is the 802.3at specification, the 802.3at Type1 specification is compatible with the 802.3af specification, and the 802.3at Type 2 specification provides greater electrical power (for example, 25.5 watts (w)) to drive high A power receiving device that consumes power.

The power supply device can also be distinguished as a physical layer (Layer1) or a link layer (Layer2) when implementing how to detect the POE specification of the powered device (for example, 802.3af (802.3at Type1) or 802.3at Type2). The above-mentioned implementation of the physical layer (Layer 1) is, for example, that the power supply device and the power receiving device are provided with corresponding hardware, thereby actively detecting mutual POE specifications through a matching hardware architecture. Although this method is convenient, it requires a relatively high hardware cost. In addition, the above-mentioned method of using the link layer (Layer 2) is, for example, when the power receiving device requires a larger amount of electric power, and the power receiving device transmits the network active and power supply devices during operation, and uses the link layer discovery protocol (Link Layer). Discovery Protocol) to communicate the POE specifications of both parties from 802.3af (802.3at Type1) to 802.3at Type2.

However, if the link layer (Layer 2) is used, the general power receiving device cannot activate the network function and adjust the POE specification before starting the power. Therefore, for electronic products that require higher power consumption during the boot process, these electronic products cannot be powered by the Ethernet power supply technology. Therefore, how to allow the power receiving device and the power supply device to automatically adjust the POE specification at the time of startup or use is a problem that many manufacturers want to solve.

The invention provides an electronic device and a starting method thereof. When the power supply source is not in the high power mode, the electronic device only activates the network function to adjust the power supply specification of the Ethernet network, so as to obtain sufficient electric power and let the electronic device The power is turned on through the Ethernet power supply technology, and there is no need to modify the hardware and software design of the power supply equipment powered by Ethernet.

The invention provides an electronic device comprising an Ethernet interface, a firmware control unit, a power state temporary storage unit and a basic input and output unit. The Ethernet interface is coupled to a power supply device having an Ethernet power supply to receive power through a network route. The firmware control unit is coupled to the Ethernet interface, and the firmware control unit sets the power status signal according to the rated power of the power source. The power state temporary storage unit is coupled to the firmware control unit to temporarily store the power state signal. The basic input and output unit is coupled to the firmware control unit. Wherein, when the electronic device receives the power source, the firmware control unit checks the power state signal to determine whether the power state of the power source is the first power mode. When the power state is not the first power mode, the basic input/output unit performs a second power-on procedure to enable the electronic device to have a network communication function and to make the power consumption of the electronic device not greater than the rated power of the power source. The firmware control unit communicates with the power supply device through the network to raise the rated power of the power source to a first rated power value, and set the power state signal such that the power state of the power source is the first power mode. And restarting the electronic device.

In an embodiment of the present invention, when the firmware control unit checks the power status signal to determine that the power state is the first power mode, the basic input/output unit waits for and receives the start signal to perform a normal boot process, thereby starting the location. Said electronic device.

In an embodiment of the invention, the electronic device and the power supply device described above both support the 802.3af specification and the 802.3 second type specification.

In an embodiment of the present invention, when the firmware control unit communicates with the power supply device through a network, the power supply device is adjusted from the 802.3af specification to the 802.3 second type specification to increase the power supply. Rated power to the first rated power value.

In an embodiment of the invention, the Ethernet interface generates a pluck signal when the network route is removed from the Ethernet interface. Moreover, the firmware control unit further receives the plucking signal to reset the temporarily stored power state signal.

In an embodiment of the invention, the power state temporary storage unit includes a data flip-flop and an OR gate. The data end of the data flip-flop receives the power state signal transmitted by the firmware control unit, and the clock end of the data flip-flop receives the temporary trigger signal transmitted by the firmware control unit, and the output of the data flip-flop generates power. Status temporary signal. The first input terminal of the OR gate receives the power state temporary storage signal, or the second input terminal of the gate receives the pull-out signal, and the output terminal of the OR gate outputs the temporarily stored power state signal.

In an embodiment of the present invention, the basic input/output unit performs the second power-on procedure to reduce the operating frequency of the central processing unit of the electronic device, reduce the access frequency of the memory, turn off the video output function, and hard Disc access function, audio output function and universal serial serial port function.

In an embodiment of the invention, the network communication function described above is a link layer discovery protocol function.

In another aspect, the present invention provides a method of starting an electronic device that is suitable for an electronic device having an Ethernet power supply function. Said The method includes the steps of: determining whether an Ethernet interface of the electronic device is inserted into a network route, and receiving power from the power supply device having an Ethernet power supply through the network route. When it is confirmed that the power has been received, the power status signal is checked to determine whether the power state of the power source is the first power mode. When the power state is not the first power mode, performing a second power-on procedure on the electronic device to enable the electronic device to have a network communication function and to make the power consumption of the electronic device not greater than the rated power of the power source. Communicate with the power supply device through the network to increase the rated power of the power source to a first rated power value. The power state signal is set and temporarily stored such that the power state of the power source is the first power mode. And, restarting the electronic device.

In an embodiment of the invention, the booting method further comprises the step of waiting for and receiving the enable signal when the power state is the first power mode. And, when receiving the start signal, performing a normal boot process to activate the electronic device.

For the remaining implementation details of the startup method of the electronic device, please refer to the above description, and no further details are provided herein.

Based on the above, the electronic device disclosed in the embodiment of the present invention first determines whether the power state is a high power mode before starting the power to detect whether the power of the power source is sufficient. If the power source of the power source is insufficient (that is, the power state is not in the high power mode), the electronic device performs a power saving mode in which the power consumption is lower than the preset power (for example, 12.95w of the 802.3af specification), and the electronic device is only Network features are enabled and other features are turned off. After that, the electronic device communicates with the power supply device through the network to adjust the Ethernet power supply gauge. In order to obtain sufficient electric power and let the electronic device start normally. Therefore, the electronic device can be normally turned on by the cooperation of the hardware and the hardware so that it can obtain sufficient electric power by using the Ethernet power supply technology when the power is turned on.

The above described features and advantages of the present invention will be more apparent from the following description.

Please refer to FIG. 1. FIG. 1 is a block diagram showing an electronic device 100 suitable for power supply of an Ethernet network according to an embodiment of the invention. As shown in FIG. 1 , the electronic device 100 includes an Ethernet interface 120 , a firmware control unit 130 , a power state temporary storage unit 140 , and a basic input and output unit 150 . In the embodiment, the electronic device 100 belongs to the power receiving device in the Ethernet power supply technology. Both the electronic device 100 and the power supply device (PSE) 110 support the 802.3af specification and the 802.3 second-class specification to transmit power P through the Ethernet interface 120 (for example, the RJ45 interface) and to communicate and coordinate with each other through a network protocol. That is, the Ethernet interface 120 is coupled to the power supply device 110 having an Ethernet power supply to receive the power source P through the network route 112. The mesh route 112 is a twisted pair currently in use.

In some embodiments, in addition to receiving the power source P through the network route 112, the electronic device 100 can also receive power through the conventional mains technology, or the electronic device 100 can directly reflect the source of the power supply. Thereby, the electronic device 100 can be a consumer electronic device or a network related device additionally having a central processing unit 160 and requiring higher power for booting and operating, for example, a notebook computer, a tablet computer, and a high Power wireless transmission equipment, routers, bridges, webcams, etc.

The firmware control unit 130 is coupled to the Ethernet interface 120, the power state temporary storage edge 140, the basic input output unit 150, and the central processing unit 160. In this embodiment, the firmware control unit 130 is implemented by a firmware controller hub (FCH), and the firmware control unit 130 can also be implemented by a person skilled in the art by using a control mode such as a chip set or a south bridge chip. In this embodiment, the firmware control unit 130 can be configured with a network chip function to detect the corresponding Ethernet power supply specification of the power supply device 110 through the Ethernet interface 120, and the firmware control is performed. The unit 130 can know the rated power of the power source P according to the Ethernet power supply specification of the power supply device 110 to set the power state signal PSS1.

The power state temporary storage unit 140 is coupled to and controlled by the firmware control unit 130. The firmware control unit 130 utilizes the power state temporary storage unit 140 and the temporary storage trigger signal PCS to temporarily store the power state signal PSS1 and generate the power state signal PSS1 from the output terminal thereof. The temporarily stored power status signal PSS2. In addition, the basic input and output unit 150 is coupled to the firmware control unit 130. In this embodiment, the basic input/output unit 150 may be a basic input/output system (BIOS) in a computer device, which is mainly used to assist the related booting process of the electronic device 100.

In this embodiment, both the electronic device 100 and the power supply device 110 support the 802.3af specification and the 802.3 second-class specification. The main difference between the two specifications is that the 802.3af-compliant power supply device (POE) 110 can provide the maximum. For an electric power of 15.40 watts (w), the power receiving device will receive an average electric power of about 12.95 watts (w) for use, with some electrical work in between. The rate is consumed by the transmission medium such as the network route 112. The 802.3at Type 2 specification provides greater electrical power to drive powered devices with high power requirements. For example, a power supply unit that meets the 802.3at Class 2 specification can provide up to 34.2 watts (w). Electrical power, and the powered device can receive an average electrical power of approximately 25.5 watts (w).

However, some of the power supply devices 110 use a layer layer (Layer 2), that is, when the power receiving device actively communicates with the power supply device 110 through the network using the Link Layer Discovery Protocol. The provisioning device 110 will passively adjust to the Ethernet power supply specifications required by the powered device, for example, from the preset 802.3af specification to the 802.3 second class specification with higher power.

In view of this, the embodiment of the present invention determines the Ethernet power supply specification of the power supply device 110 before the electronic device 100 is powered on or started, if the Ethernet power supply specification (or power supply source) of the power supply device 110 is not met. In the high power mode of the electronic device, only the network function of the electronic device 100 is activated to communicate with the power supply device 110 and adjust its Ethernet power supply specifications to obtain sufficient electric power. Thereafter, the electronic power 100 can be normally activated by utilizing the sufficient electric power obtained by the Ethernet-provided boarding, and there is no need to modify the hardware and software design of the power supply device 110 powered by the Ethernet.

Therefore, the embodiment can be implemented by the electronic device 100 architecture of FIG. 1 and the flowchart of FIG. 2. FIG. 2 is a flow chart illustrating a method of starting up the electronic device 100 according to an embodiment of the invention. At step S210, when the electronic device 100 has just received the power, it determines the Ethernet of the electronic device 100. Whether the network interface 120 is inserted into the network route 112, and the power source P is received from the power supply device 110 having the Ethernet power supply through the network route 112.

If the Ethernet interface 120 does not insert the network route 112, it means that the power is supplied by the utility, and there is no problem that the power of the electronic device 100 may be insufficient when the power is turned on. Therefore, the basic input/output unit 150 in the electronic device 100 waits for the user to press the power button of the electronic device 100 to receive the start signal generated by the power button (step S260) to perform a normal booting process, thereby starting the electronic device 100 normally. (Step S270).

In contrast, if it is determined that the power source P received by the electronic device 100 is received by the Ethernet interface 120 through the network route 112, the process proceeds from step S210 to step S220, and the firmware control unit 130 first checks the temporarily stored power source. The status signal PSS2 is used to determine whether the power state of the power source P is the first power mode (ie, the high power mode). The high power mode referred to here, that is, the above 802.3at Type 2 specification can provide a larger electric power to the power receiving device than the insufficient power supplied by the 802.3af (802.3at Type 1) specification. In other words, the step of determining the power state of the power source P may also be determining whether the Ethernet power supply specification of the power supply device 110 conforms to the electronic device 100. In addition, step S210 may be performed by an element such as the firmware control unit 130, the basic input/output unit 150, or the substrate management controller, and the embodiment is not subject to the above disclosure.

When the firmware control unit 130 determines that the power state of the power source P is not the first power mode (high power mode), the process proceeds from step S220 to step S230, and the basic input output unit 150 performs the second power boot process (ie, low). The power-on procedure is such that the electronic device 100 has a network communication function and the power consumption of the electronic device 100 is not greater than the rated power of the power source P. The second power booting procedure (low power booting procedure) described in this embodiment is modified from the original normal booting procedure, and the second power booting process turns off most of the power consumption function, for example, reducing the electronic device 100. The operating frequency of the central processing unit 160, reducing the memory access frequency, turning off the video output (VGA) function, hard disk access function, audio output function, and universal serial serial port (USB) function, etc., only Leaving a slight computing function and network communication function, so that the power consumption of the electronic device 100 after passing the second power booting process will be no more than (that is, less than or equal to) the power rating of the power source P under the current POE specification. (For example, the average electric power of the 802.3af specification is 12.95w), and it is preferably realized when the power consumption of the electronic device 100 is less than 12.95w.

The network communication function referred to in step S230 may specifically refer to a Link Layer Discovery Protocol (LLDP) function. This is a summary of the link layer discovery protocol. Today's network devices are increasingly diverse and their configurations are complex. In order to enable network devices from different vendors to discover and interact with each other in the network, the chain The Layer Discovery Agreement (LLDP) is created in this context. The Link Layer Discovery Protocol (LLDP) provides a standard layer layer (Layer 2) network device discovery method, which encapsulates the main capabilities, management addresses, device identifiers, interface identifiers, etc. of the local network device. In the link layer discovery LLDP Data Unit (LLDPDU) to other network devices that are directly connected to themselves, the network device that receives the information will use it as a standard. The Management Information Base (MIB) is stored in a form for querying and judging the communication status of each network device between the networks. Therefore, in this embodiment, the firmware control unit 130 of the electronic device 100 can learn the POE specification of the power supply device 110 through the link layer discovery protocol (LLDP), and communicate with the power supply device 110. And coordination.

After the second power-on procedure described above, the electronic device 100 can be provided with the function of network communication. Therefore, in step S240, the firmware control unit 130 communicates with the power supply device 110 through the network to raise the rated power of the power source P to the first rated power value. That is, the firmware control unit 130 adjusts the POE specification in the power supply device 110 from the preset 802.3af (802.3at Typel) specification to the 802.3at Type2 specification through the network, so that the power rating of the power supply P is adjusted from 12.95w. It rises to 25.5w (that is, the first rated power value).

In step S250, the firmware control unit 130 sets the power state signal PSS1 to make the power state of the power source P the first power mode, and transmits the power state signal PSS1 through the power state temporary storage unit 140 and the temporary storage trigger signal PCS. . It is proposed that, in the embodiment, when the power state signal PSS1 and the temporarily stored power state signal PSS2 are enabled, it indicates that the power state of the power source P is the first power mode (high power mode, that is, 802.3at Type 2). When the power state signal PSS1 and the temporarily stored power state signal PSS2 are disabled, it indicates that the power state of the power source P is not the first power mode, but the present invention can also be implemented by the reverse state. Thereafter, in step S225, the electronic device 100 is restarted.

After the electronic device 100 is restarted, the process returns to step S220. Since the firmware control unit 130 has set the power state signal PSS1 to enable in the above step S250, it is indicated that the power state of the power source P is the first power mode, and the power source is The state temporary storage unit 140 temporarily stores the enabled power state signal PSS2. Therefore, the firmware control unit 130 determines in step S220 that the power state of the power source P is the first power mode, and thus proceeds to step S260 to make the basic input/output unit. 150 waits for and receives a start signal (step S260), and executes a normal boot process, thereby starting the electronic device 100.

On the other hand, if the user removes the network route 112 from the Ethernet interface 120 in the above steps S210 to S270, the Ethernet interface will generate a pull-out signal accordingly. Thereby, the firmware control unit 130 or the power state temporary storage unit 140 will remove the signal to reset the temporarily stored power state signal PSS2, so as to avoid mistaking the POE specification of the power supply device 110 as the first power. The case of mode (high power mode). In other words, if the user accidentally inserts the network route 112 and reinserts the Ethernet interface 120, some of the power supply devices 110 may return to the preset 802.3af specification to the electronic device 100. Since the electronic device 100 needs to reset the temporarily stored power state signal PSS2 to prevent the electronic device 100 from starting.

On the other hand, the power state temporary storage unit 140 of the present embodiment further receives the commercial power supply signal AC_IN. When the electronic device 100 receives the mains power as the power source, the mains supply signal AC_IN will be enabled, and the power state temporary storage unit 140 sets the temporarily stored power state signal PSS2 to enable. Therefore, the normal booting process is directly performed without going through steps S230-255 of FIG.

The detailed circuit architecture of the power state temporary storage unit 140 is detailed herein. FIG. 3 is a circuit diagram of the power state temporary storage unit 140. The power state temporary storage unit 140 mainly includes a data flip-flop (DFF) 310 and an or gate 320. The data terminal D of the data flip-flop 310 is connected to the intermediate point of the voltage dividing circuit composed of the resistors R1 and R2. One end of the voltage dividing circuit is connected to the power supply voltage VDD, and the other end receives the firmware control unit 130 of FIG. The transmitted power status signal PSS1. The clock terminal of the data flip-flop 310 passes through the buffer 330 and the capacitor C to receive the temporary trigger signal PCS transmitted by the firmware control unit 130. The output terminal Q of the data flip-flop 310 generates a power state temporary storage signal PSS3. The first input of the OR gate 320 receives the power state temporary storage signal PSS3, or the second input of the gate 320 receives the commercial power supply signal AC_IN, and the output of the OR gate 320 outputs the temporarily stored power state signal PSS2.

The following table (1) is a partial truth table of the power state temporary storage unit 140 of FIG. 3:

According to the circuit architecture of FIG. 3, as shown in the above table (1), the state 1 is represented by the firmware control unit 130 through the Ethernet interface 120 and the link layer discovery protocol (LLDP) to detect that the power supply device 110 adopts 802.3. When the af (802.3at Type1) specification is not inserted into the mains, the power status signal PSS1 is set to 0 (disabled), and the mains supply signal AC_IN is 0 (disabled), so the temporarily stored power status signal PSS2 is 0 (disabled).

In the state 2, when the firmware control unit 130 detects that the power supply device 110 adopts the 802.3at Type 2 specification and does not insert the mains, the power state signal PSS1 is set to 1 (enable), and the commercial power supply signal AC_IN is 0 (disabled), but since the temporary trigger signal PCS does not trigger the clock terminal of the data flip-flop 310, the temporarily stored power state signal PSS2 is still 0 (disabled). State 3 is when the firmware control unit 130 generates the temporary trigger signal PCS to trigger the clock terminal of the data flip-flop 310. At this time, the power state signal PSS1 set to 1 (enabled) will be directed to the data positive. The output of the inverter 310 is such that the power state temporary storage signal PSS3 is 1 (enabled), and the temporarily stored power state signal PSS2 is set to 1 (enabled). In the state 4, when the electronic device 100 receives the mains power for starting or operating, the mains supply signal AC_IN is 1 (enabled), so that the temporarily stored power state signal PSS2 will continue to be 1 (enabled), regardless of other signals. Change.

In summary, the electronic device disclosed in the embodiment of the present invention first determines whether the power state is a high power mode before starting the power to detect whether the power of the power source is sufficient. If the power source of the power supply source is insufficient (that is, the power state is not in the high power mode), the electronic device performs power consumption lower than the preset power. (For example, the 12.2.3w of the 802.3af specification), the electronic device only has the network function and has turned off other functions. After that, the electronic device communicates with the power supply device through the network to adjust the Ethernet power supply specification, thereby obtaining sufficient electric power and allowing the electronic device to start normally. Therefore, the electronic device can be normally turned on by the cooperation of the hardware and the hardware so that it can obtain sufficient electric power by using the Ethernet power supply technology when the power is turned on.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Electronic devices

110‧‧‧Power supply equipment

112‧‧‧Network route

120‧‧‧ Ethernet interface

130‧‧‧ Firmware Control Unit

140‧‧‧Power Status Staging Unit

150‧‧‧Basic input and output unit

160‧‧‧Central Control Unit

310‧‧‧ data flip-flop

320‧‧‧ or (OR) gate

330‧‧‧buffer

S210~S270‧‧‧Steps for starting the electronic device

AC_IN‧‧‧Power supply signal

VDD‧‧‧Power supply voltage

P‧‧‧Power supply

PCS‧‧‧ temporary trigger signal

PSS1, PSS2‧‧‧ power status signal

PSS3‧‧‧Power Status Temporary Signal

R1, R2‧‧‧ resistance

C‧‧‧ capacitor

1 is a block diagram showing an electronic device suitable for use in an Ethernet power supply, in accordance with an embodiment of the present invention.

2 is a flow chart illustrating a method of starting an electronic device in accordance with an embodiment of the present invention.

3 is a circuit diagram of a power state temporary storage unit.

100‧‧‧Electronic devices

110‧‧‧Power supply equipment

112‧‧‧Network route

120‧‧‧ Ethernet interface

130‧‧‧ Firmware Control Unit

140‧‧‧Power Status Staging Unit

150‧‧‧Basic input and output unit

160‧‧‧Central Control Unit

P‧‧‧Power supply

PCS‧‧‧ temporary trigger signal

PSS1, PSS2‧‧‧ power status signal

Claims (10)

An electronic device includes: an Ethernet interface coupled to a power supply device having an Ethernet power supply to receive power through a network route; and a firmware control unit coupled to the Ethernet interface, according to the The power rating of the power source is set to a power state signal; the power state temporary storage unit is coupled to the firmware control unit to temporarily store the power state signal; and the basic input/output unit is coupled to the firmware control unit, wherein, when the electronic When the device receives the power, the firmware control unit checks the power status signal to determine whether the power state of the power source is the first power mode, and when the power state is not the first power mode, the basic input/output unit performs a second power booting process, wherein the electronic device has a network communication function and the power consumption of the electronic device is not greater than a rated power of the power source, and the firmware control unit communicates with the power supply device through the network to increase the The rated power of the power source is up to the first rated power value, and the power state signal is set such that the power state of the power source is the first power mode And restart the electronic device. The electronic device of claim 1, wherein the firmware control unit checks the power status signal to determine that the power state is the first power mode, and the basic input/output unit waits for and receives a start signal to perform normal. Boot the program to start the electronic device. The electronic device of claim 1, wherein the electronic device and the power supply device support the 802.3af specification and the 802.3 In a second type of specification, when the firmware control unit communicates with the power supply device through the network, the power supply device is adjusted from the 802.3af specification to the 802.3 second type specification to increase the rated power of the power supply to the The first rated power value. The electronic device of claim 1, wherein the Ethernet interface generates a plucking signal when the network route is removed from the Ethernet interface, and the firmware control unit further receives the plucking signal to reset the The power state signal temporarily stored, the power state temporary storage unit further receiving a power supply signal to set the power state signal to enable when the utility power signal is enabled. The electronic device of claim 4, wherein the power state temporary storage unit comprises: a data flip-flop, the data end receiving the power state signal transmitted by the firmware control unit, and the data of the forward/reverse device The pulse end receives the temporary trigger signal transmitted by the firmware control unit, and the output of the data flip-flop generates a power state temporary storage signal; and or the gate, the first input terminal receives the power state temporary storage signal, the or The second input of the gate receives the utility supply signal, and the output of the OR gate outputs the temporarily stored power status signal. The electronic device of claim 1, wherein the basic input/output unit performs the second power-on procedure to reduce the operating frequency of the central processing unit of the electronic device, reduce the memory access frequency, and close the video. Output function, hard disk access function, audio output function and universal serial serial port function. A method for starting an electronic device is applicable to the electronic device having an Ethernet power supply function, the method comprising: determining whether an Ethernet interface of the electronic device is inserted into a network route, and having power supply from the Ethernet The power supply device receives the power through the network route; when confirming receiving the power, checking the power status signal to determine whether the power state of the power source is the first power mode; when the power state is not the first power mode, The electronic device performs a second power-on procedure, so that the electronic device has a network communication function and the power consumption of the electronic device is not greater than a rated power of the power source; and the power supply device communicates with the power supply device to adjust the power supply through the network. Rising power to a first rated power value; setting and temporarily storing the power state signal such that the power state of the power source is the first power mode; and restarting the electronic device. The activation method of claim 7, further comprising: waiting for and receiving a start signal when the power state is the first power mode; and performing a normal boot process when the start signal is received, thereby starting the electronic Device. The activation method of claim 7, wherein the electronic device and the power supply device support the 802.3af standard and the 802.3 second type specification, and Increasing the rated power of the power source to the first rated power value comprises the steps of: the firmware control unit communicating with the power supply device through the network to adjust the power supply device from the 802.3af specification to the 802.3 second Class specifications. The activation method of claim 7, further comprising: generating a plucking signal when the network route is removed from the Ethernet interface; and resetting the temporarily stored power state signal according to the plucking signal .