CN107196768B - SOC Ethernet working mode adaptive method and apparatus - Google Patents
SOC Ethernet working mode adaptive method and apparatus Download PDFInfo
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- CN107196768B CN107196768B CN201710378976.6A CN201710378976A CN107196768B CN 107196768 B CN107196768 B CN 107196768B CN 201710378976 A CN201710378976 A CN 201710378976A CN 107196768 B CN107196768 B CN 107196768B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
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Abstract
The present invention provides a kind of SOC Ethernet working mode adaptive method and apparatus, described device crosses operating mode selection circuit to configure the operating mode of present apparatus, and the corresponding clock of current operation mode is adjusted by clock gating circuit, complete the automatic switchover of work clock.Clock gating circuit can execute shutoff operation to inoperative clock, to obtain saving the purpose of power consumption.The device of the invention not only supports the operating modes such as RMII, GMII, RGMII, and no matter external chip whether there is itself clock generating unit, and the device of the invention is equally applicable.By the cooperation of SOC inside chip and external chip, so that work clock switching carries out without any confusion, then under the premise of guaranteeing that ethernet controller works normally, and it is reduced as far as power consumption, has achieved the effect that save hardware cost.
Description
Technical field
The present invention relates to SOC chip framework field, in particular to a kind of SOC Ethernet working mode adaptive method and dress
It sets.
Background technique
Ethernet mac (Media Access Control, i.e. MAC layer) its operating mode is varied, main
To include following several: one is 10,000,000 100 m ethernets, and related protocol RMII, corresponding message transmission rate is 10,000,000 Hes
100000000；The other is gigabit Ethernet, related protocol has GMII or RGMII, and gigabit ethernet card is backward compatible 10,000,000 and 100,000,000
Transmission rate.
Since the operating mode of Ethernet card is numerous, and it is very strict to clock frequency requirement, thus is usually at present
A clock circuit is designed, for each operating mode to meet the requirement of clock frequency.However it designs in this way
Very complicated not only increases the hardware area of circuit, also increases power consumption when circuit operation, hardware cost is caused to rise.
Summary of the invention
For this reason, it may be necessary to a kind of technical solution of SOC Ethernet working mode adaptive be provided, for solving current SOC core
Piece is required to be independently arranged a clock circuit for each operating mode of Ethernet card, and chip is caused to design cumbersome, function
The problems such as consumption increase, cost increase.
To achieve the above object, a kind of SOC Ethernet working mode adaptive device, described device packet are inventor provided
Include external chip, inside chip, operating mode selection circuit, clock gating circuit and ethernet controller；The inside chip
It is connect with ethernet controller；The external chip includes the first clock generating unit, and the inside chip includes second clock
Generation unit, the first function sub-unit and the second function sub-unit；The clock gating circuit respectively with the first function sub-unit, the second function
Sub-unit, the first clock generating unit, the connection of second clock generation unit；
The operating mode selection circuit operating mode current for configuration device, the operating mode includes RMII mould
Formula, GMII mode and RGMII mode；
First clock generating unit is used to generate the first clock according to the first predeterminated frequency, and the second clock generates
Unit is used to generate second clock according to the second predeterminated frequency；
When the selected operating mode of operating mode selection circuit be RMII mode when, the clock gating circuit be used for from
A clock is selected in first clock and second clock, and is controlled non-selected another clock and disconnected；Selected clock is corresponding
Clock generating unit is used to be sent to ethernet controller using selected clock as reference clock, and being also used to will be selected
Clock transfer generates third clock to the first function sub-unit, and using third clock as reception/tranmitting data register be sent to
Too net controller；The ethernet controller is used to receive reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the clock gate
Control circuit controls non-selected another clock and disconnects for selecting a clock from the first clock and second clock；It is selected
The corresponding clock generating unit of clock be used for selected clock transfer to the second function sub-unit, when generating the 4th
Clock, and the 4th clock is sent to ethernet controller；The ethernet controller is in work for receiving the 4th clock
State.
It is further, described that " clock gating circuit is controlled for selecting a clock from the first clock and second clock
Non-selected another clock disconnects " it include: clock gating circuit for keeping the first clock, and disconnect second clock；It is then described
" selected clock corresponding clock generating unit " is the first clock generating unit.
Further, the ethernet controller is also connect with external chip, and the ethernet controller is also used to be in
After working condition, data interaction is carried out with the external chip.
Further, the first function sub-unit include the first power splitter and the second power splitter, first power splitter and
Second power splitter is in parallel, " by selected clock transfer to the first function sub-unit, the generating third clock " include: by
Selected clock is transmitted separately to the first power splitter and the second power splitter, and according to the work clock of ethernet controller frequency
Rate selects a clock after the first power splitter or the second power splitter carry out function point, generates third clock.
Further, the second function sub-unit includes third power splitter and the 4th power splitter, the third power splitter and
4th power splitter is in parallel, and described " by selected clock transfer to the second function sub-unit, generating the 4th clock " includes: root
According to the working clock frequency of ethernet controller, Ethernet control is directly transferred to using selected clock as the 4th clock
Device, or according to the working clock frequency of ethernet controller, selected clock is transmitted separately to third power splitter and
Four power splitters, and a clock after third power splitter or the 4th power splitter carry out function point is selected, generate the 4th clock.
Further, the clock gating circuit includes the first gate controlled switch, the second gate controlled switch and third gate controlled switch；
First gate controlled switch is used to control the transmission of reference clock；Second gate controlled switch is for controlling and receiving/tranmitting data register
Transmission；The third gate controlled switch is used to control the transmission of the 4th clock；When the selected work of operating mode selection circuit
When mode is RMII mode, first gate controlled switch and the second gate controlled switch are opened, and third gate controlled switch is closed；Work as Working mould
When the selected operating mode of formula selection circuit is GMII mode or RGMII mode, first gate controlled switch and the second gate
Switch is closed, and third gate controlled switch is opened.
Inventor additionally provides a kind of SOC Ethernet working mode adaptive method, and the method is applied to SOC Ethernet
Working mode adaptive device, described device include external chip, inside chip, operating mode selection circuit, Clock gating electricity
Road and ethernet controller；The inside chip is connect with ethernet controller；The external chip is generated including the first clock
Unit, the inside chip include second clock generation unit, the first function sub-unit and the second function sub-unit；The Clock gating
Circuit is connect with the first function sub-unit, the second function sub-unit, the first clock generating unit, second clock generation unit respectively；Institute
State method the following steps are included:
The current operating mode of operating mode selection circuit configuration device, the operating mode include RMII mode, GMII
Mode and RGMII mode；
First clock generating unit generates the first clock according to the first predeterminated frequency, and second clock generation unit is according to second
Predeterminated frequency generates second clock；
When the selected operating mode of operating mode selection circuit is RMII mode, which comprises
Clock gating circuit selects a clock from the first clock and second clock, and it is disconnected to control non-selected another clock
It opens；
The corresponding clock generating unit of selected clock is sent to Ethernet using selected clock as reference clock
Controller, and by selected clock transfer to the first function sub-unit, generates third clock, and using third clock as
Reception/tranmitting data register is sent to ethernet controller；
Ethernet controller receives reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the method packet
It includes:
Clock gating circuit selects a clock from the first clock and second clock, and it is disconnected to control non-selected another clock
It opens；
The corresponding clock generating unit of selected clock is raw by selected clock transfer to the second function sub-unit
Ethernet controller is sent at the 4th clock, and by the 4th clock；
Ethernet controller receives the 4th clock, and in running order.
Further, " clock gating circuit selects a clock to the step from the first clock and second clock, and controls
Non-selected another clock disconnects " it include: that clock gating circuit keeps the first clock, and disconnects second clock；It is then described " selected
The corresponding clock generating unit of the clock selected " is the first clock generating unit.
Further, the ethernet controller is also connect with external chip, the method also includes:
After ethernet controller is in running order, data interaction is carried out with the external chip.
Further, the first function sub-unit include the first power splitter and the second power splitter, first power splitter and
Second power splitter is in parallel, step " by selected clock transfer to the first function sub-unit, the generating third clock " packet
It includes: selected clock is transmitted separately to the first power splitter and the second power splitter, and when according to the work of ethernet controller
Clock frequency selects a clock after the first power splitter or the second power splitter carry out function point, generates third clock.
Further, the second function sub-unit includes third power splitter and the 4th power splitter, the third power splitter and
4th power splitter is in parallel, step " by selected clock transfer to the second function sub-unit, generating the 4th clock " packet
It includes: according to the working clock frequency of ethernet controller, being directly transferred to Ethernet for selected clock as the 4th clock
Controller, or according to the working clock frequency of ethernet controller, selected clock is transmitted separately to third power splitter
With the 4th power splitter, and a clock after third power splitter or the 4th power splitter carry out function point is selected, when generating the 4th
Clock.
Further, the clock gating circuit includes the first gate controlled switch, the second gate controlled switch and third gate controlled switch；
First gate controlled switch is used to control the transmission of reference clock；Second gate controlled switch is for controlling and receiving/tranmitting data register
Transmission；The third gate controlled switch is used to control the transmission of the 4th clock；The described method includes:
When the selected operating mode of operating mode selection circuit is RMII mode, first gate controlled switch and second
Gate controlled switch is opened, and third gate controlled switch is closed；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, described first
Control switch and the second gate controlled switch are closed, and third gate controlled switch is opened.
Inventor additionally provides a kind of SOC Ethernet working mode adaptive device, and described device includes external chip, interior
Portion's chip, operating mode selection circuit, clock gating circuit and ethernet controller；The inside chip and ethernet controller
Connection；The inside chip includes second clock generation unit, the first function sub-unit and the second function sub-unit；The Clock gating
Circuit is connect with the first function sub-unit, the second function sub-unit, second clock generation unit respectively；
The operating mode selection circuit operating mode current for configuration device, the operating mode includes RMII mould
Formula, GMII mode and RGMII mode；
The second clock generation unit is used to generate second clock according to the second predeterminated frequency；
When the selected operating mode of operating mode selection circuit is RMII mode, the clock gating circuit is for protecting
Hold second clock；The second clock generation unit is used to be sent to ethernet controller for second clock as reference clock,
It is also used to transport to second clock the first function sub-unit, generates third clock, and using third clock as when reception/transmission
Clock is sent to ethernet controller；The ethernet controller is in work for receiving reference clock and reception/tranmitting data register
Make state；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the clock gate
Control circuit is for keeping second clock；The second clock generation unit is used to for second clock to be transmitted to second function point single
Member generates the 4th clock, and the 4th clock is sent to ethernet controller；When the ethernet controller is for receiving the 4th
Clock, and it is in running order.
Inventor additionally provides a kind of SOC Ethernet working mode adaptive method, and the method is applied to SOC Ethernet
Working mode adaptive device, described device include external chip, inside chip, operating mode selection circuit, Clock gating electricity
Road and ethernet controller；The inside chip is connect with ethernet controller；The inside chip includes that second clock generates
Unit, the first function sub-unit and the second function sub-unit；The clock gating circuit is single with the first function sub-unit, the second function point respectively
Member, the connection of second clock generation unit；The described method includes:
The current operating mode of operating mode selection circuit configuration device, the operating mode include RMII mode, GMII
Mode and RGMII mode；
Second clock generation unit generates second clock according to the second predeterminated frequency；
When the selected operating mode of operating mode selection circuit is RMII mode, which comprises
Clock gating circuit keeps second clock；
Second clock is sent to ethernet controller by second clock generation unit, and second clock is defeated
To the first function sub-unit, third clock is generated, and is sent to Ethernet control for third clock as reception/tranmitting data register
Device；
Ethernet controller receives reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the method packet
It includes:
Clock gating circuit keeps second clock；
Second clock is transmitted to the second function sub-unit by second clock generation unit, generates the 4th clock, and by the
Four clocks are sent to ethernet controller；
Ethernet controller is used to receive the 4th clock, and in running order.
The invention has the following advantages that configuring the operating mode of present apparatus by operating mode selection circuit, and lead to
Oversampling clock gating circuit adjusts the corresponding clock of current operation mode, completes the automatic switchover of work clock.Clock gating electricity
Road can execute shutoff operation to other clocks for not being work clock, to obtain saving the purpose of power consumption.The device of the invention
Not only support the operating modes such as RMII, GMII, RGMII, and no matter external chip whether there is itself clock generating unit,
The device of the invention is equally applicable.By the cooperation of SOC inside chip and external chip, so that work clock switching is without any confusion
It carries out, then under the premise of guaranteeing that ethernet controller works normally, and has been reduced as far as power consumption, has reached saving hardware cost
Effect.
Detailed description of the invention
Fig. 1 is the schematic diagram for the SOC Ethernet working mode adaptive device that an embodiment of the present invention is related to；
Fig. 2 is the schematic diagram for the SOC Ethernet working mode adaptive device that another embodiment of the present invention is related to；
Fig. 3 is the schematic diagram for the SOC Ethernet working mode adaptive device that another embodiment of the present invention is related to；
Fig. 4 is that the SOC Ethernet working mode adaptive device that an embodiment of the present invention is related to is in RMII Working mould
Schematic diagram under formula；
Fig. 5 is that the SOC Ethernet working mode adaptive device that an embodiment of the present invention is related to is in GMII or RGMII
Schematic diagram under operating mode；
Fig. 6 is that the SOC Ethernet working mode adaptive device that another embodiment of the present invention is related to is in RMII work
Schematic diagram under mode；
Fig. 7 be the SOC Ethernet working mode adaptive device that another embodiment of the present invention is related to be in GMII or
Schematic diagram under RGMII operating mode；
Fig. 8 is the flow chart for the SOC Ethernet working mode adaptive method that an embodiment of the present invention is related to；
Fig. 9 is the flow chart for the SOC Ethernet working mode adaptive method that another embodiment of the present invention is related to；
Description of symbols:
101, external chip；111, the first clock generating unit；
102, inside chip；
112, second clock generation unit；
122, the first function sub-unit；1221, the first power splitter；1222, the second power splitter；
123, the second function sub-unit；1231, third power splitter；1232, the 4th power splitter；
103, operating mode selection circuit；
104, clock gating circuit；114, the first gate controlled switch；124, the second gate controlled switch；134, third gate controlled switch；
105, ethernet controller.
Specific embodiment
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality
It applies example and attached drawing is cooperated to be explained in detail.
Referring to Fig. 1, the signal for the SOC Ethernet working mode adaptive device being related to for an embodiment of the present invention
Figure.Described device includes external chip 101, inside chip 102, operating mode selection circuit 103,104 and of clock gating circuit
Ethernet controller 105；The inside chip 102 is connect with ethernet controller 105；The external chip 101 includes first
Clock generating unit 111, the inside chip 102 include second clock generation unit 112, the first function sub-unit 122 and second
Function sub-unit 123；The clock gating circuit 104 respectively with the first function sub-unit 122, the second function sub-unit 123, the first clock
Generation unit 111, second clock generation unit 112 connect.
The operating mode selection circuit 103 operating mode current for configuration device.The operating mode includes
RMII mode, GMII mode and RGMII mode, wherein RMII mode be 10,000,000 100 m ethernet card agreements, GMII mode and
RGMII mode is gigabit ethernet card agreement.In actual application, the current operating mode of configuration device can pass through reading
Take the numerical value in register to determine, for example, by RMII pattern configurations be " 00 ", GMII pattern configurations be " 01 ", RGMII mode
" 11 " are configured to, determine which kind of operating mode present apparatus is in by reading numerical value different in register.
First clock generating unit 111 is used to generate the first clock, the second clock according to the first predeterminated frequency
Generation unit 112 is used to generate the first predeterminated frequency of second clock according to the second predeterminated frequency and second frequency can be according to reality
It is set, such as when operating mode is RMII mode, the first clock or second clock can be 50MHz or 25MHz；
When operating mode is GMII mode or RGMII mode, the first clock or second clock can be 125MHz.
When the selected operating mode of operating mode selection circuit is RMII mode, the clock gating circuit 104 is used
In selecting a clock from the first clock and second clock, and controls non-selected another clock and disconnect；Selected clock pair
The clock generating unit answered is used to be sent to ethernet controller using selected clock as reference clock, and being also used to will be selected
The clock transfer selected generates third clock to the first function sub-unit, and sends third clock as reception/tranmitting data register
To ethernet controller；The ethernet controller is in work shape for receiving reference clock and reception/tranmitting data register
State.
In the present embodiment, described " clock gating circuit is used to select a clock from the first clock and second clock,
And control non-selected another clock and disconnect " it include: clock gating circuit for keeping the first clock, and disconnect second clock；
Then described " selected clock corresponding clock generating unit " is the first clock generating unit.Inside external chip there is
Clock generating unit (i.e. with clock generating unit), when using the first clock generating unit clock generated as work
Clock.
In certain embodiments, the first function sub-unit 122 includes the first power splitter 1221 and the second power splitter 1222,
First power splitter 1221 and the second power splitter 1222 are in parallel, described " by selected clock transfer to first function point
Unit generates third clock " it include: that selected clock is transmitted separately to the first power splitter 1221 and the second power splitter
1222, and according to the working clock frequency of ethernet controller, select one to carry out by the first power splitter or the second power splitter
Clock after function point generates third clock.Ethernet controller works in RMII mode, needs a reference clock and connects
It transmits/receives and clock is sent to be worked normally, the working frequency of reference clock can be the first clock frequency, reception/tranmitting data register
Working frequency then can carry out function point processing to the first clock, generate third according to the operating frequency requirements of ethernet controller
Clock, and the frequency of third clock is made to meet the requirement of ethernet controller working clock frequency.Such as when the first clock
When frequency is 50MHz, then 50MHz work clock can be used as reference clock and be transmitted to ethernet controller all the way, if Ethernet
The working frequency of controller is 25MHz (for hundred Broadcoms), then the first clock can divide by the first power splitter one is
Two, the third clock of 25MHz is generated, and be transmitted to ethernet controller for third clock as reception/tranmitting data register；Similarly,
If the working frequency of ethernet controller is 2.5MHz (for ten Broadcoms), the first clock can be by the second function point
Device is divided into two ten, generates the third clock of 2.5MHz, and be transmitted to ether network control for third clock as reception/tranmitting data register
Device processed.
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the clock gate
Control circuit 104 controls non-selected another clock and disconnects for selecting a clock from the first clock and second clock；It is selected
The corresponding clock generating unit of the clock selected is used for selected clock transfer to the second function sub-unit, when generating the 4th
Clock, and the 4th clock is sent to ethernet controller；The ethernet controller is in work for receiving the 4th clock
State.
In the present embodiment, the second function sub-unit 123 includes third power splitter 1231 and the 4th power splitter 1232,
The third power splitter 1231 and the 4th power splitter 1232 are in parallel, described " by selected clock transfer to second function point
Unit, the 4th clock of generation " includes: the working clock frequency according to ethernet controller, using selected clock as the 4th
Clock is directly transferred to ethernet controller, or according to the working clock frequency of ethernet controller, by selected clock
It is transmitted separately to third power splitter and the 4th power splitter, and selects one to carry out function point by third power splitter or the 4th power splitter
Clock afterwards generates the 4th clock.Such as first frequency of clock when being 125MHz, and the working frequency of ethernet controller is
125MHz (for Gigabit Ethernet) is directly transferred to ethernet controller as the 4th clock；If ethernet controller
Working frequency is 25MHz (for hundred Broadcoms), then it is five that the first clock can divide by third power splitter one, is generated
The 4th clock of 25MHz, and by the 4th clock transfer to ethernet controller；When the working frequency of ethernet controller is
2.5MHz (for ten Broadcoms), then it is 50 that the first clock can divide by the 4th power splitter one, generates 2.5MHz's
4th clock, and by the 4th clock transfer to ethernet controller.(clock frequency is when being in gigabit rate to realization device
125MHz), same backward compatible 10,000,000 and 100,000,000 rates (corresponding clock frequency is respectively 2.5MHz and 25MHz).
In certain embodiments, the ethernet controller is also connect with external chip, and the ethernet controller is also used
After in running order, data interaction is carried out with the external chip.
In certain embodiments, the clock gating circuit 104 includes the first gate controlled switch 114, the second gate controlled switch 124
With third gate controlled switch 134；First gate controlled switch 114 is used to control the transmission of reference clock；Second gate controlled switch
124 for controlling and receiving/the transmission of tranmitting data register；The third gate controlled switch 134 is used to control the transmission of the 4th clock；Work as work
When the selected operating mode of operation mode selection circuit is RMII mode, first gate controlled switch 114 and the second gate controlled switch
124 open, and third gate controlled switch 134 is closed；When the selected operating mode of operating mode selection circuit be GMII mode or
When RGMII mode, first gate controlled switch 114 and the second gate controlled switch 124 are closed, and third gate controlled switch 134 is opened.This
Sample controls for being respectively provided with a gate controlled switch per clock all the way, passes through the first gate controlled switch 114, the second gate controlled switch
124 and third gate controlled switch 134 can realize and ethernet controller work clock is switched fast.
As shown in Fig. 2, the signal for the SOC Ethernet working mode adaptive device being related to for another embodiment of the present invention
Figure.Described device includes external chip 101, inside chip 102, operating mode selection circuit 103,104 and of clock gating circuit
Ethernet controller 105；The inside chip 102 is connect with ethernet controller 105；The inside chip 102 includes second
Clock generating unit 112, the first function sub-unit 122 and the second function sub-unit 123；The clock gating circuit 104 is respectively with
One function sub-unit 122, the second function sub-unit 123, second clock generation unit 112 connect；
The operating mode selection circuit 103 operating mode current for configuration device, the operating mode include
RMII mode, GMII mode and RGMII mode.The second clock generation unit 112 is used to generate according to the second predeterminated frequency
Second clock, the second predeterminated frequency can be adjusted according to actual needs.
When the selected operating mode of operating mode selection circuit is RMII mode, the clock gating circuit is for protecting
Hold second clock；The second clock generation unit is used to be sent to ethernet controller for second clock as reference clock,
It is also used to transport to second clock the first function sub-unit, generates third clock, and using third clock as when reception/transmission
Clock is sent to ethernet controller；The ethernet controller is in work for receiving reference clock and reception/tranmitting data register
Make state；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the clock gate
Control circuit is for keeping second clock；The second clock generation unit is used to for second clock to be transmitted to second function point single
Member generates the 4th clock, and the 4th clock is sent to ethernet controller；When the ethernet controller is for receiving the 4th
Clock, and it is in running order.
In this embodiment, external chip itself does not have clock generating unit, and the clock of work is equally by second
Clock generating unit transmission provides, so as to ethernet controller it is in running order after, external chip and ethernet controller it
Between can be with further progress data interaction.Switching for ethernet controller work clock, it is similar with the device in Fig. 1, this
Place repeats no more.
As shown in figure 3, the signal for the SOC Ethernet working mode adaptive device being related to for another embodiment of the present invention
Figure.The overall structure of SOC Ethernet working mode adaptive device is described in Fig. 3, wherein in " configuration information storage unit "
The corresponding numerical value of present apparatus operating mode is stored, gmac_phy indicates the first clock generating unit of external chip, PLL table
Show the second clock generation unit of inside chip, GATE1, GATE2, GATE3 respectively indicate the first gate controlled switch, the second gate is opened
It closes, third gate controlled switch；Div2, Div20, Div5, Div50 respectively indicate the first power splitter, the second power splitter, third power splitter
With the 4th power splitter.
As shown in Figure 4,5, when SOC Ethernet working mode adaptive device is in RMII operating mode, GATE1 and
GATE2 is opened, and GATE3 is closed, and the integrated circuit structure of Fig. 3 is reduced to shown in Fig. 4；When SOC Ethernet working mode adaptive
When device is in GMII or RGMII operating mode, GATE1 and GATE2 are closed, and GATE3 is opened, the integrated circuit structure letter of Fig. 3
It turns to shown in Fig. 5.In the embodiment of Fig. 4, Fig. 5, the work clock of ethernet controller is raw by the first clock of external chip
It is provided at unit.
As shown in Figure 6,7, in this embodiment, clock generating unit, Ethernet control is not present in external chip itself
The work clock of device is provided by the second clock generation unit of inside chip.At SOC Ethernet working mode adaptive device
When RMII operating mode, GATE1 and GATE2 are opened, and GATE3 is closed, and the integrated circuit structure of Fig. 3 is reduced to shown in Fig. 6；When
When SOC Ethernet working mode adaptive device is in GMII or RGMII operating mode, GATE1 and GATE2 are closed, and GATE3 is opened
It opens, the integrated circuit structure of Fig. 3 is reduced to shown in Fig. 7.
Referring to Fig. 8, inventor additionally provides a kind of SOC Ethernet working mode adaptive method, the method application
In SOC Ethernet working mode adaptive device, described device include external chip, inside chip, operating mode selection circuit,
Clock gating circuit and ethernet controller；The inside chip is connect with ethernet controller；The external chip includes the
One clock generating unit, the inside chip include second clock generation unit, the first function sub-unit and the second function sub-unit；Institute
It states clock gating circuit and generates list with the first function sub-unit, the second function sub-unit, the first clock generating unit, second clock respectively
Member connection；It the described method comprises the following steps:
Initially enter the current operating mode of step S801 operating mode selection circuit configuration device.The operating mode packet
Include RMII mode, GMII mode and RGMII mode.First clock generating unit generates the first clock according to the first predeterminated frequency,
Second clock generation unit generates second clock according to the second predeterminated frequency.
When the selected operating mode of operating mode selection circuit is RMII mode, which comprises
Step S802 clock gating circuit selects a clock from the first clock and second clock, and controls non-selected another
One clock disconnects；
The corresponding clock generating unit of the selected clock of step S803 is sent selected clock as reference clock
To ethernet controller, and by selected clock transfer to the first function sub-unit, third clock is generated, and by third
Clock is sent to ethernet controller as reception/tranmitting data register；
Step S804 ethernet controller receives reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the method packet
It includes:
Step S805 clock gating circuit selects a clock from the first clock and second clock, and controls non-selected another
One clock disconnects；
The corresponding clock generating unit of the selected clock of step S806 is by selected clock transfer to second function
Sub-unit generates the 4th clock, and the 4th clock is sent to ethernet controller；
Step S807 ethernet controller receives the 4th clock, and in running order.
In certain embodiments, the step " clock gating circuit selects a clock from the first clock and second clock,
And control non-selected another clock and disconnect " it include: that clock gating circuit keeps the first clock, and disconnects second clock；Then institute
" selected clock corresponding clock generating unit " is stated as the first clock generating unit.
In certain embodiments, the ethernet controller is also connect with external chip, the method in step S804 or
After S807 further include: after ethernet controller is in running order, carry out data interaction with the external chip.
In certain embodiments, the first function sub-unit includes the first power splitter and the second power splitter, first function
Divide device and the second power splitter in parallel, the step is " by selected clock transfer to the first function sub-unit, when generating third
Clock " includes: that selected clock is transmitted separately to the first power splitter and the second power splitter, and according to the work of ethernet controller
Make clock frequency, selects a clock after the first power splitter or the second power splitter carry out function point, generate third clock.
In certain embodiments, the second function sub-unit includes third power splitter and the 4th power splitter, the third function
Divide device and the 4th power splitter in parallel, the step is " by selected clock transfer to the second function sub-unit, when generating the 4th
Clock " includes: the working clock frequency according to ethernet controller, using selected clock as the 4th clock be directly transferred to
Too net controller, or according to the working clock frequency of ethernet controller, selected clock is transmitted separately to third function
Point device and the 4th power splitter, and select a clock after third power splitter or the 4th power splitter carry out function point generate the
Four clocks.
In certain embodiments, the clock gating circuit includes the first gate controlled switch, the second gate controlled switch and third door
Control switch；First gate controlled switch is used to control the transmission of reference clock；Second gate controlled switch is for controlling and receiving/sending out
Send the transmission of clock；The third gate controlled switch is used to control the transmission of the 4th clock；The described method includes: when operating mode selects
When to select the selected operating mode of circuit be RMII mode, first gate controlled switch and the second gate controlled switch are opened, third door
Control switch is closed；When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, described first
Gate controlled switch and the second gate controlled switch are closed, and third gate controlled switch is opened.
As shown in figure 9, the process for the SOC Ethernet working mode adaptive method being related to for another embodiment of the present invention
Figure.The method is applied to SOC Ethernet working mode adaptive device, and described device includes external chip, inside chip, work
Operation mode selection circuit, clock gating circuit and ethernet controller；The inside chip is connect with ethernet controller；It is described
Inside chip includes second clock generation unit, the first function sub-unit and the second function sub-unit；The clock gating circuit difference
It is connect with the first function sub-unit, the second function sub-unit, second clock generation unit；The described method includes:
Initially enter the current operating mode of step S901 operating mode selection circuit configuration device.The operating mode packet
Include RMII mode, GMII mode and RGMII mode；Second clock generation unit generates second clock according to the second predeterminated frequency.
When the selected operating mode of operating mode selection circuit is RMII mode, which comprises
Step S902 clock gating circuit keeps second clock；
Second clock is sent to ethernet controller by step S903 second clock generation unit, by
Two clocks transport to the first function sub-unit, generate third clock, and using third clock as reception/tranmitting data register be sent to
Too net controller；
Step S904 ethernet controller receives reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the method packet
It includes:
Step S905 clock gating circuit keeps second clock；
Second clock is transmitted to the second function sub-unit by step S906 second clock generation unit, when generating the 4th
Clock, and the 4th clock is sent to ethernet controller；
Step S907 ethernet controller is used to receive the 4th clock, and in running order.
The invention has the following advantages that configuring the operating mode of present apparatus by operating mode selection circuit, and lead to
Oversampling clock gating circuit adjusts the corresponding clock of current operation mode, completes the automatic switchover of work clock.Clock gating electricity
Road can execute shutoff operation to other clocks for not being work clock, to obtain saving the purpose of power consumption.The device of the invention
Not only support the operating modes such as RMII, GMII, RGMII, and no matter external chip whether there is itself clock generating unit,
The device of the invention is equally applicable.By the cooperation of SOC inside chip and external chip, so that work clock switching is without any confusion
It carries out, then under the premise of guaranteeing that ethernet controller works normally, and has been reduced as far as power consumption, has reached saving hardware cost
Effect.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or the terminal device that include a series of elements not only include those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or end
The intrinsic element of end equipment.In the absence of more restrictions, being limited by sentence " including ... " or " including ... "
Element, it is not excluded that there is also other elements in process, method, article or the terminal device for including the element.This
Outside, herein, " being greater than ", " being less than ", " being more than " etc. are interpreted as not including this number；" more than ", " following ", " within " etc. understand
Being includes this number.
It should be understood by those skilled in the art that, the various embodiments described above can provide as method, apparatus or computer program production
Product.Complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in these embodiments
Form.The all or part of the steps in method that the various embodiments described above are related to can be instructed by program relevant hardware come
It completes, the program can store in the storage medium that computer equipment can be read, for executing the various embodiments described above side
All or part of the steps described in method.The computer equipment, including but not limited to: personal computer, server, general-purpose computations
It is machine, special purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, smart home device, wearable
Smart machine, vehicle intelligent equipment etc.；The storage medium, including but not limited to: RAM, ROM, magnetic disk, tape, CD, sudden strain of a muscle
It deposits, USB flash disk, mobile hard disk, storage card, memory stick, webserver storage, network cloud storage etc..
The various embodiments described above are referring to the method according to embodiment, equipment (system) and computer program product
Flowchart and/or the block diagram describes.It should be understood that can be realized by computer program instructions every in flowchart and/or the block diagram
The combination of process and/or box in one process and/or box and flowchart and/or the block diagram.It can provide these computers
Program instruction generates a machine to the processor of computer equipment, so that the finger executed by the processor of computer equipment
It enables and generates to specify in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of function.
These computer program instructions, which may also be stored in, to be able to guide computer equipment computer operate in a specific manner and sets
In standby readable memory, so that the instruction being stored in the computer equipment readable memory generates the manufacture including command device
Product, command device realization refer in one or more flows of the flowchart and/or one or more blocks of the block diagram
Fixed function.
These computer program instructions can also be loaded into computer equipment, so that executing on a computing device a series of
Operating procedure is to generate computer implemented processing, so that the instruction executed on a computing device is provided for realizing in process
The step of function of being specified in figure one process or multiple processes and/or block diagrams one box or multiple boxes.
Although the various embodiments described above are described, once a person skilled in the art knows basic wounds
The property made concept, then additional changes and modifications can be made to these embodiments, so the above description is only an embodiment of the present invention,
It is not intended to limit scope of patent protection of the invention, it is all to utilize equivalent structure made by description of the invention and accompanying drawing content
Or equivalent process transformation, being applied directly or indirectly in other relevant technical fields, similarly includes in patent of the invention
Within protection scope.
Claims (14)
1. a kind of SOC Ethernet working mode adaptive device, which is characterized in that described device includes external chip, inner core
Piece, operating mode selection circuit, clock gating circuit and ethernet controller；The inside chip and ethernet controller connect
It connects；The external chip includes the first clock generating unit, and the inside chip includes second clock generation unit, the first function point
Unit and the second function sub-unit；The clock gating circuit is raw with the first function sub-unit, the second function sub-unit, the first clock respectively
It is connected at unit, second clock generation unit；
The operating mode selection circuit for the current operating mode of configuration device, the operating mode include RMII mode,
GMII mode and RGMII mode；
First clock generating unit is used to generate the first clock, the second clock generation unit according to the first predeterminated frequency
For generating second clock according to the second predeterminated frequency；
When the selected operating mode of operating mode selection circuit is RMII mode, the clock gating circuit is used for from first
A clock is selected in clock and second clock, and is controlled non-selected another clock and disconnected；The corresponding clock of selected clock
Generation unit is used to be sent to ethernet controller using selected clock as reference clock, is also used to selected clock
It is transmitted to the first function sub-unit, generates third clock, and be sent to Ethernet for third clock as reception/tranmitting data register
Controller；The ethernet controller is used to receive reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the Clock gating electricity
Road controls non-selected another clock and disconnects for selecting a clock from the first clock and second clock；When selected
The corresponding clock generating unit of clock is used to selected clock transfer to the second function sub-unit generating the 4th clock, and
4th clock is sent to ethernet controller；The ethernet controller is used to receive the 4th clock, and in running order.
2. SOC Ethernet working mode adaptive device as described in claim 1, which is characterized in that " the Clock gating electricity
Road controls non-selected another clock and disconnects for selecting a clock from the first clock and second clock " it include: clock gate
Circuit is controlled for keeping the first clock, and disconnects second clock；Then described " selected clock corresponding clock generating unit "
For the first clock generating unit.
3. SOC Ethernet working mode adaptive device as described in claim 1, which is characterized in that the Ethernet control
Device is also connect with external chip, the ethernet controller be also used to it is in running order after, counted with the external chip
According to interaction.
4. SOC Ethernet working mode adaptive device as described in claim 1, which is characterized in that first function point is single
Member includes the first power splitter and the second power splitter, and first power splitter and the second power splitter are in parallel, described " when will be selected
Clock is transmitted to the first function sub-unit, generates third clock " it include: that selected clock is transmitted separately to the first power splitter
One is selected to pass through the first power splitter or the second function and according to the working clock frequency of ethernet controller with the second power splitter
Divide device to carry out the clock after function point, generates third clock.
5. SOC Ethernet working mode adaptive device as described in claim 1, which is characterized in that second function point is single
Member includes third power splitter and the 4th power splitter, and the third power splitter and the 4th power splitter are in parallel, described " when will be selected
Clock is transmitted to the second function sub-unit, generates the 4th clock " it include: working clock frequency according to ethernet controller, it will
Selected clock is directly transferred to ethernet controller, or the work clock according to ethernet controller as the 4th clock
Selected clock is transmitted separately to third power splitter and the 4th power splitter, and selects one to pass through third power splitter by frequency
Or the 4th power splitter carry out the clock after function point, generate the 4th clock.
6. SOC Ethernet working mode adaptive device as described in claim 1, which is characterized in that the Clock gating electricity
Road includes the first gate controlled switch, the second gate controlled switch and third gate controlled switch；When first gate controlled switch is for controlling reference
The transmission of clock；Second gate controlled switch is used to control and receive/the transmission of tranmitting data register；The third gate controlled switch is for controlling
The transmission of 4th clock；When the selected operating mode of operating mode selection circuit is RMII mode, first gate is opened
It closes and the second gate controlled switch is opened, third gate controlled switch is closed；When the selected operating mode of operating mode selection circuit is
When GMII mode or RGMII mode, first gate controlled switch and the second gate controlled switch are closed, and third gate controlled switch is opened.
7. a kind of SOC Ethernet working mode adaptive method, which is characterized in that the method works applied to SOC Ethernet
Mode adaptive device, described device include external chip, inside chip, operating mode selection circuit, clock gating circuit and
Ethernet controller；The inside chip is connect with ethernet controller；The external chip includes the first clock generating unit,
The inside chip includes second clock generation unit, the first function sub-unit and the second function sub-unit；The clock gating circuit
It is connect respectively with the first function sub-unit, the second function sub-unit, the first clock generating unit, second clock generation unit；The side
Method the following steps are included:
The current operating mode of operating mode selection circuit configuration device, the operating mode include RMII mode, GMII mode
With RGMII mode；
First clock generating unit generates the first clock according to the first predeterminated frequency, and second clock generation unit is default according to second
Frequency generates second clock；
When the selected operating mode of operating mode selection circuit is RMII mode, which comprises
Clock gating circuit selects a clock from the first clock and second clock, and controls non-selected another clock and disconnect；
Selected clock is sent to Ethernet control by the corresponding clock generating unit of selected clock
Device, and by selected clock transfer to the first function sub-unit, generates third clock, and using third clock as connecing
It transmits/receives and clock is sent to be sent to ethernet controller；
Ethernet controller receives reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, which comprises
Clock gating circuit selects a clock from the first clock and second clock, and controls non-selected another clock and disconnect；
Selected clock transfer to the second function sub-unit is generated the by the corresponding clock generating unit of selected clock
Four clocks, and the 4th clock is sent to ethernet controller；
Ethernet controller receives the 4th clock, and in running order.
8. SOC Ethernet working mode adaptive method as claimed in claim 7, which is characterized in that the step " clock gate
Control circuit selects a clock from the first clock and second clock, and controls non-selected another clock and disconnect " it include: clock gate
It controls circuit and keeps the first clock, and disconnect second clock；Then described " selected clock corresponding clock generating unit " is the
One clock generating unit.
9. SOC Ethernet working mode adaptive method as claimed in claim 7, which is characterized in that the Ethernet control
Device is also connect with external chip, the method also includes:
After ethernet controller is in running order, data interaction is carried out with the external chip.
10. SOC Ethernet working mode adaptive method as claimed in claim 7, which is characterized in that first function point is single
Member includes the first power splitter and the second power splitter, and first power splitter and the second power splitter are in parallel, and the step " will be selected
Clock transfer to the first function sub-unit, generate third clock " include: that selected clock is transmitted separately to the first function
Point device and the second power splitter, and according to the working clock frequency of ethernet controller, select one by the first power splitter or the
Two power splitters carry out the clock after function point, generate third clock.
11. SOC Ethernet working mode adaptive method as claimed in claim 7, which is characterized in that second function point is single
Member includes third power splitter and the 4th power splitter, and the third power splitter and the 4th power splitter are in parallel, and the step " will be selected
Clock transfer to the second function sub-unit, generate the 4th clock " include: work clock frequency according to ethernet controller
Selected clock is directly transferred to ethernet controller, or the work according to ethernet controller by rate
Make clock frequency, selected clock is transmitted separately to third power splitter and the 4th power splitter, and select one to pass through third
Power splitter or the 4th power splitter carry out the clock after function point, generate the 4th clock.
12. SOC Ethernet working mode adaptive method as claimed in claim 7, which is characterized in that the Clock gating electricity
Road includes the first gate controlled switch, the second gate controlled switch and third gate controlled switch；When first gate controlled switch is for controlling reference
The transmission of clock；Second gate controlled switch is used to control and receive/the transmission of tranmitting data register；The third gate controlled switch is for controlling
The transmission of 4th clock；The described method includes:
When the selected operating mode of operating mode selection circuit is RMII mode, first gate controlled switch and the second gate
Switch is opened, and third gate controlled switch is closed；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, first gate is opened
It closes and the second gate controlled switch is closed, third gate controlled switch is opened.
13. a kind of SOC Ethernet working mode adaptive device, which is characterized in that described device includes external chip, inner core
Piece, operating mode selection circuit, clock gating circuit and ethernet controller；The inside chip and ethernet controller connect
It connects；The inside chip includes second clock generation unit, the first function sub-unit and the second function sub-unit；The Clock gating electricity
Road is connect with the first function sub-unit, the second function sub-unit, second clock generation unit respectively；
The operating mode selection circuit for the current operating mode of configuration device, the operating mode include RMII mode,
GMII mode and RGMII mode；
The second clock generation unit is used to generate second clock according to the second predeterminated frequency；
When the selected operating mode of operating mode selection circuit is RMII mode, the clock gating circuit is for keeping the
Two clocks；The second clock generation unit is used to be sent to ethernet controller for second clock as reference clock, also uses
In second clock is transported to the first function sub-unit, third clock is generated, and send out third clock as reception/tranmitting data register
It send to ethernet controller；The ethernet controller is in work shape for receiving reference clock and reception/tranmitting data register
State；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, the Clock gating electricity
Road is for keeping second clock；The second clock generation unit is used to second clock being transmitted to the second function sub-unit,
The 4th clock is generated, and the 4th clock is sent to ethernet controller；The ethernet controller is used to receive the 4th clock,
And it is in running order.
14. a kind of SOC Ethernet working mode adaptive method, which is characterized in that the method works applied to SOC Ethernet
Mode adaptive device, described device include external chip, inside chip, operating mode selection circuit, clock gating circuit and
Ethernet controller；The inside chip is connect with ethernet controller；The inside chip include second clock generation unit,
First function sub-unit and the second function sub-unit；The clock gating circuit respectively with the first function sub-unit, the second function sub-unit,
The connection of two clock generating units；The described method includes:
The current operating mode of operating mode selection circuit configuration device, the operating mode include RMII mode, GMII mode
With RGMII mode；
Second clock generation unit generates second clock according to the second predeterminated frequency；
When the selected operating mode of operating mode selection circuit is RMII mode, which comprises
Clock gating circuit keeps second clock；
Second clock is sent to ethernet controller by second clock generation unit, and second clock is transported to institute
The first function sub-unit is stated, generates third clock, and be sent to ethernet controller for third clock as reception/tranmitting data register；
Ethernet controller receives reference clock and reception/tranmitting data register, and in running order；
When the selected operating mode of operating mode selection circuit is GMII mode or RGMII mode, which comprises
Clock gating circuit keeps second clock；
Second clock is transmitted to the second function sub-unit by second clock generation unit, generates the 4th clock, and when by the 4th
Clock is sent to ethernet controller；
Ethernet controller is used to receive the 4th clock, and in running order.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710378976.6A CN107196768B (en) | 2017-05-25 | 2017-05-25 | SOC Ethernet working mode adaptive method and apparatus |
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|---|---|---|---|
| CN201710378976.6A CN107196768B (en) | 2017-05-25 | 2017-05-25 | SOC Ethernet working mode adaptive method and apparatus |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011023993A1 (en) * | 2009-08-25 | 2011-03-03 | Gigle Networks Limited | Network apparatus and method |
| CN205647557U (en) * | 2016-05-19 | 2016-10-12 | 龙芯中科技术有限公司 | Ethernet interface circuit and network equipment |
-
2017
- 2017-05-25 CN CN201710378976.6A patent/CN107196768B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011023993A1 (en) * | 2009-08-25 | 2011-03-03 | Gigle Networks Limited | Network apparatus and method |
| CN205647557U (en) * | 2016-05-19 | 2016-10-12 | 龙芯中科技术有限公司 | Ethernet interface circuit and network equipment |
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Address after: 350003 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China Patentee after: Ruixin Microelectronics Co., Ltd Address before: 350003 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China Patentee before: Fuzhou Rockchips Electronics Co.,Ltd. |