CN222189780U - Circuit capable of selecting trusted module voltage mode and computer motherboard - Google Patents
Circuit capable of selecting trusted module voltage mode and computer motherboard Download PDFInfo
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- CN222189780U CN222189780U CN202420031955.2U CN202420031955U CN222189780U CN 222189780 U CN222189780 U CN 222189780U CN 202420031955 U CN202420031955 U CN 202420031955U CN 222189780 U CN222189780 U CN 222189780U
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Abstract
The utility model provides a circuit capable of selecting a voltage mode of a trusted module, which comprises a processor, a first trusted module, a voltage level converter, a trusted module connector for externally connecting a second trusted module, a change-over switch, a first power supply and a second power supply. The SPI interface of the processor is connected to the first trusted module and to the trusted module connector via the voltage level translator. The voltage level converter is also connected with the change-over switch. The change-over switch is connected with the first power supply and the second power supply and can be switched between the first power supply and the second power supply so that the first power supply provides a first voltage to the voltage level converter or the second power supply provides a second voltage to the voltage level converter. The utility model can provide two voltage modes for the trusted module for selection and use, and can easily switch the voltage modes of the trusted module without additional reworking.
Description
Technical Field
The present utility model relates to the field of computer technologies, and in particular, to a circuit capable of selecting a voltage mode of a trusted module and a computer motherboard.
Background
Computer system security is the basis of information and network security, and with the popularization and development of computer technology, the requirements on computer data security are higher and higher, and the application of a trusted module is also increasingly important.
The trusted module comprises a trusted platform module (Trusted Platform Module, TPM for short) and a trusted cryptography module (Trusted Cryptography Module, TCM for short). The trusted platform module is a TPM hardware security chip proposed by a trusted computing group (Trusted Computing Group, TCG) and an international standard of the trusted computing system constructed by the trusted platform module, is planted in a computer to provide a trusted root for the computer so as to effectively protect a PC and prevent illegal users from accessing, and the trusted cryptographic module is a national standard adopted by China, corresponds to the international standard and is used for achieving the same technical effect, and is mainly characterized by being constructed by a cryptographic algorithm and an engine which are independently researched and developed in China.
Both trusted platform modules and trusted crypto modules may be used as crypto platforms to support trusted computing, the trusted implementation principles of which are similar. At present, the most common voltage modes of the trusted cryptographic module and the trusted platform module in the market are 1.8V, 3.3V and 2.5V, wherein 1.8V and 3.3V are the most common voltage modes of the domestic platform, so when a main board is designed, a hardware engineer often reserves at least two power supply voltages for the trusted platform module or the trusted cryptographic module, but also reserves a circuit, and the trusted platform module or the trusted platform module can be switched from one voltage mode to another voltage mode only by reworking, that is, the same main board is not used, so that the trusted platform module or the trusted cryptographic module can be simultaneously adapted to the two voltage modes, which brings inconvenience to the practical application of the main board provided with the trusted platform module or the trusted cryptographic module.
Disclosure of utility model
The utility model aims to provide a circuit capable of selecting a voltage mode of a trusted module and a computer main board, which can provide two voltage modes for the trusted module for selection and use, and can easily switch the voltage modes of the trusted module without additional reworking.
To achieve the above object, the present utility model provides a circuit for selecting a voltage mode of a trusted module, comprising a processor, a first trusted module, a voltage level shifter, a trusted module connector for connecting a second trusted module, a switch, a first power supply and a second power supply, wherein an SPI interface of the processor is connected to the first trusted module, and the SPI interface is further connected to the trusted module connector via the voltage level shifter, the voltage level shifter is further connected to the switch, the switch is connected to the first power supply and the second power supply and the switch is capable of switching between the first power supply and the second power supply such that the first power supply provides a first voltage to the voltage level shifter, or the second power supply provides a second voltage to the voltage level shifter, wherein when the first power supply provides the first voltage to the voltage level shifter, the voltage level shifter converts a voltage of a signal received from the interface to the SPI, and when the SPI interface provides the first voltage to the voltage level shifter, the SPI signal is converted to the second power supply, and when the SPI interface provides the SPI signal to the second power supply, the SPI signal is connected to the second power supply.
Preferably, the first trusted module is a trusted platform module or a trusted cryptographic module, and correspondingly, the trusted module connector is used for externally connecting the trusted platform module or the trusted cryptographic module.
Preferably, the voltage level shifter includes a first port group, a second port group, a first power port and a second power port, the first port group is connected to the SPI interface, the second port group is connected to the trusted module connector, the first port group tracks the voltage of the first power port, the second port group tracks the voltage of the second power port, wherein the voltage of the first power port is the voltage of the SPI signal received from the SPI interface, and the second power port is connected to the switch and the power interface of the trusted module connector.
Preferably, the switch comprises a jump cap and a power connector, wherein the power connector comprises a first input end, a second input end and an output end, the first input end is connected to the first power supply, the second input end is connected to the second power supply, the output end is connected to the second power supply port, the jump cap is arranged on the power connector, and one of the first input end and the second input end is selectively electrically connected to the output end.
Preferably, the first voltage is 1.8V and the second voltage is 3.3V.
Preferably, the voltage of the SPI signal output by the SPI interface is 1.8V.
Preferably, the processor is a Feiteng D3000 processor.
Preferably, the voltage level converter is a bidirectional voltage level conversion chip, the model of which is RS0208YTS 20, the first trusted module is a trusted cryptographic module, and the model of the trusted module connector is SWF-PHD2006.
The utility model also provides a computer motherboard, which comprises the circuit for selecting the voltage mode of the trusted module.
Preferably, the first power supply includes a main board P1V8SB power supply and a main board P1V8 power supply, and the second power supply includes a main board P3V3SB power supply and a main board P3V3 power supply.
The voltage level converter can be connected with different power supply voltages through the change-over switch to perform voltage conversion of corresponding SPI signals, so that the voltage level converter can provide different voltage modes for the second trusted module, a user can adapt corresponding voltage modes for the second external trusted module through controlling the change-over switch according to the needs, and additional reworking is not needed to perform circuit setting, meanwhile, the SPI interface of the processor is directly connected to the first trusted module to directly provide SPI signals, which are consistent with the voltage setting of the processor, for the first trusted module, so that the voltage mode circuit and the computer of the selectable trusted module can be used for the second trusted module to perform voltage conversion of corresponding SPI signals, and the voltage level converter can provide different voltage modes for the second trusted module simultaneously.
Drawings
For a further understanding of the nature and technical aspects of the present utility model, reference should be made to the following detailed description of the utility model and to the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the utility model.
In the drawings of which there are shown,
Fig. 1 is a block diagram of the circuit of the alternative trusted module voltage mode of the present utility model.
Fig. 2-3 are partial circuit wiring diagrams of a circuit for an alternative trusted module voltage mode provided on a computer motherboard according to an embodiment of the present utility model.
Detailed Description
In order to further explain the technical means adopted by the present utility model and the effects thereof, the following detailed description is given with reference to the preferred embodiments of the present utility model and the accompanying drawings.
As shown in fig. 1, the circuit for selecting a trusted module voltage mode of the present utility model includes a processor 10, a first trusted module 20, a voltage level shifter 30, a trusted module connector 40 for connecting to a second trusted module 9, a switch 50, a first power supply 60, and a second power supply 70.
The SPI interface of the processor 10 is connected to the first trusted module 20, and the SPI interface is also connected to the trusted module connector 40 via the voltage level shifter 30. The voltage level shifter 30 is further connected to the switch 50, the switch 50 is connected to the first power source 60 and the second power source 70, and the switch 50 is capable of switching between the first power source 60 and the second power source 70, so that the first power source 60 provides a first voltage to the voltage level shifter 30, or the second power source 70 provides a second voltage to the voltage level shifter 30.
Wherein when the first power supply 60 provides the first voltage to the voltage level converter 30, the voltage level converter 30 converts the voltage of the SPI signal received from the SPI interface into the first voltage and then transmits the SPI signal to the trusted module connector 40, and when the second power supply 60 provides the second voltage to the voltage level converter 30, the voltage level converter 30 converts the voltage of the SPI signal received from the SPI interface into the second voltage and then transmits the SPI signal to the trusted module connector 40.
It can be seen that, in the circuit with the voltage mode of the selectable trusted module according to the present utility model, the SPI interface of the processor 10 is directly connected to the first trusted module 20, that is, the SPI signal conforming to the voltage setting of the processor 10 can be directly provided to the first trusted module 20, and meanwhile, the SPI interface of the processor 10 is connected to the trusted module connector 40 through the voltage level converter 30, that is, the SPI signal conforming to the voltage setting of the processor 10 can be provided to the trusted module connector 40 after being voltage-converted, so that the trusted module connector 40 is provided to the external second trusted module 9. Since the voltage level shifter 30 may access different power supply voltages (the first voltage and the second voltage) through the switch 50 to perform voltage conversion of the corresponding SPI signal, the voltage level shifter 30 may provide different voltage modes for the second trusted module 9, so that, in the case where the second trusted module 9 is connected, a user may adapt the corresponding voltage modes for the second trusted module 9 by controlling the switch 50 as needed, without additional reworking to perform circuit configuration.
Here, the processor 10 may select whether to use the first trusted module 20 or the second trusted module 9 externally connected to the trusted module connector 40 through a chip selection signal output by the SPI interface, and transmit the SPI signal directly to the first trusted module 20 or to the second trusted module 9 externally connected through the voltage level converter 30 and the trusted module connector 40.
In the application of the trusted module, if the voltage mode of the trusted module needs to be converted, the selection and conversion of the voltage mode of the trusted module can be conveniently realized by externally connecting the second trusted module 9 and operating the change-over switch 50.
The first trusted module 20 may be a trusted platform module (Trusted Platform Module, abbreviated as TPM) or a trusted cryptographic module (Trusted Cryptography Module, abbreviated as TCM), and the trusted module connector 40 is correspondingly configured to connect to the trusted platform module or the trusted cryptographic module, that is, the second trusted module 9 is a trusted platform module or a trusted cryptographic module.
Further, the voltage level shifter 30 includes a first port group, a second port group, a first power port and a second power port, the first port group is connected to the SPI interface of the processor 10, the second port group is connected to the trusted module connector 40, wherein the first port group tracks the voltage of the first power port, the second port group tracks the voltage of the second power port, wherein the voltage of the first power port is the voltage of the SPI signal received from the SPI interface, and the second power port is connected to the switch 50 and the power interface of the trusted module connector 40.
In an embodiment, the voltage level shifter 30 is a bidirectional voltage level shifter chip, and the type of the voltage level shifter chip may be RS0208YTSS20, and the type of the trusted module connector 40 may be SWF-PHD2006.
Further, the switch 50 may include a jump cap and a power connector, the power connector includes a first input terminal, a second input terminal, and an output terminal, the first input terminal is connected to the first power source 60, the second input terminal is connected to the second power source 70, the output terminal is connected to the second power port of the voltage level shifter 30, and the jump cap is disposed on the power connector, and selectively electrically connects one of the first input terminal and the second input terminal to the output terminal. By setting the jump cap, the first power supply 60 provides a first voltage to the second power port of the voltage level shifter 30 when the jump cap is electrically connected to the first input terminal and the output terminal, and the second power supply 70 provides a second voltage to the second power port of the voltage level shifter 30 when the jump cap is electrically connected to the second input terminal and the output terminal.
Thus, by setting the switch 50 of the present utility model, the jump cap is electrically connected to the first input end and the output end of the power connector, the first power supply 60 provides a first voltage to the second power port of the voltage level converter 30, the voltage level converter 30 can convert the voltage of the SPI signal received from the SPI interface of the processor into the first voltage and transmit the converted SPI signal to the trusted module connector 40, and the second power supply 70 provides a second voltage to the second power port of the voltage level converter 30, and the voltage level converter 30 can convert the voltage of the SPI signal received from the SPI interface of the processor into the second voltage and transmit the converted SPI signal to the trusted module connector 40. Therefore, the circuit for selecting the voltage mode of the trusted module can provide two voltage modes for the trusted module, so that a user can select and set the voltage modes according to needs, and the voltage mode conversion can be easily realized through the change-over switch 50 when the voltage mode conversion is needed.
The first voltage and the second voltage can be set by matching with a processor according to the requirement of a user. In an embodiment, the first voltage may be 1.8V and the second voltage 3.3V. Furthermore, if the second trusted module 9 has a 2.5V voltage mode requirement, the first voltage or the second voltage may be set to 2.5V. Indeed, the circuit of the present utility model for selecting a trusted module voltage mode may also provide more voltage modes for a trusted module by increasing the number of voltage level shifters 30 and trusted module connectors 40.
In one embodiment, the power connector is a three pin connector.
In one embodiment, the processor 10 is a Feiteng D3000 processor.
Through the arrangement, the circuit capable of selecting the voltage mode of the trusted module can provide two power supply modes for the trusted module, so that a user can select the trusted module for use according to needs, and the circuit is not required to be set again by additional reworking.
The utility model also provides a computer motherboard, which comprises the circuit for selecting the voltage mode of the trusted module.
As shown in fig. 2-3, a part of a circuit wiring diagram of a circuit for selecting a voltage mode of a trusted module provided on a computer motherboard according to an embodiment of the present utility model is shown in fig. 2, wherein fig. 2 mainly shows a circuit wiring diagram of a first trusted module 20 in the embodiment, and fig. 3 mainly shows a circuit wiring diagram of a voltage level shifter 30, a trusted module connector 40, a switch 50, a first power supply 60, and a second power supply 70 in the embodiment.
In the embodiment, the first trusted module 20 is a trusted cryptographic module, and is of the type Z32H330TC-SQN-755, and is connected to an SPI interface (including, but not limited to, an SPI0_sdi pin, an SPI0_sdo pin, an SPI0_cs0# pin, and an SPI0_sck pin) of the processor 10 (not shown), and the processor 10 may be a Feiteng D3000 processor.
The voltage level shifter 30 is a bidirectional voltage level shifter chip (U26), and the model is RS0208YTSS20. The first port group of the voltage level shifter 30 is an a port group, connected to the SPI interface (including the SPI0_sdi pin, the SPI0_sdo pin, the SPI0_cs1# pin, and the SPI0_sck pin) of the processor 10, and the first port group tracks the voltage of the first power port VCCA, the second port group is a B port group, connected to the trusted module connector 40, and the second port group tracks the voltage of the second power port VCCB.
In this embodiment, the voltage of the first power supply port VCCA is 1.8V, and is provided by the motherboard P1V8SB power supply or the motherboard P1V8 power supply. Specifically, the first power port VCCA is connected to the power supply of the motherboard P1V8SB via a resistor R87, is connected to the power supply of the motherboard P1V8 via a resistor R89, and is grounded via a resistor R445 and is grounded via a capacitor C11. The second power supply port VCCB of the voltage level shifter 30 is connected to the power supply interface of the switch 50 and the trusted module connector 40.
The trusted module connector 40 is a trusted cryptography module connector (JTCM 1), which may be of the type SWF-PHD2006.
The switch 50 includes a jump cap j_ CTCM and a power connector CTCM _w, the power connector CTCM _w including a first input 1, a second input 3, and an output 2. The first power supply 60 includes a main board P1V8SB power supply and a main board P1V8 power supply, where the main board P1V8SB power supply is connected to the first input terminal 1 through a resistor R112, the main board P1V8 power supply is connected to the first input terminal 1 through a resistor R113, and the first input terminal is further grounded through a capacitor C20. The second power supply 70 includes a main board P3V3SB power supply and a main board P3V3SB power supply, where the main board P3V3SB power supply is connected to the second input terminal 3 via a resistor 88, the main board P3V3 power supply is connected to the second input terminal 3 via a resistor R109, and the second input terminal 3 is further grounded via a capacitor C19. The output terminal 2 is connected to the second power supply port VCCB of the voltage level converter 30 and to a power supply interface of the trusted module connector 40. The jump cap j_ CTCM is disposed on the power connector CTCM _w, and can be switched between the first input terminal 1 and the second input terminal 3 to electrically connect the first input terminal 1 to the output terminal 2 or electrically connect the second input terminal 3 to the output terminal 2.
When the jump cap j_ CTCM electrically connects the first input terminal 1 to the output terminal 2, the first power supply 60 provides a first voltage of 1.8V to the second power supply port VCCB of the voltage level shifter 30, the voltage level shifter 30 can provide an SPI signal of 1.8V to the trusted module connector 40, and when the jump cap j_ CTCM electrically connects the second input terminal 3 to the output terminal 2, the second power supply 70 provides a second voltage of 3.3V to the second power supply port VCCB of the voltage level shifter 30, the voltage level shifter 30 can convert a voltage of an SPI signal received from an SPI interface of the processor into a second voltage of 3.3V and provide an SPI signal of 3.3V to the trusted module connector 40.
The jump cap J_ CTCM may be of the type SMJ-25402 and the power connector CTCM _W may be of the type SPH-254010325-116A, but is not limited thereto.
In summary, according to the circuit and the computer motherboard for selecting the voltage mode of the trusted module, through the arrangement of the voltage level converter, the change-over switch and the trusted module connector, the SPI signal conforming to the voltage setting of the processor can be subjected to corresponding voltage mode conversion according to the requirement, and then provided for the external second trusted module by the trusted module connector. Meanwhile, the SPI interface of the processor is directly connected to the first trusted module, and SPI signals conforming to the voltage setting of the processor are directly provided for the first trusted module. Therefore, the circuit and the computer main board for selecting the voltage modes of the trusted module can realize that two different voltage modes are simultaneously provided for the trusted module for selection and use through the same main board, and the voltage modes of the trusted module can be easily switched without additional reworking, thereby bringing great convenience for practical application of the main board provided with the trusted platform module or the trusted cryptographic module.
In the above, it should be apparent to those skilled in the art that various other modifications and variations can be made in accordance with the technical solution and the technical idea of the present utility model, and all such modifications and variations are intended to fall within the scope of the claims of the present utility model.
Claims (10)
1. The circuit for selecting the voltage mode of the trusted module is characterized by comprising a processor, a first trusted module, a voltage level converter, a trusted module connector for externally connecting a second trusted module, a switching switch, a first power supply and a second power supply, wherein an SPI interface of the processor is connected to the first trusted module, the SPI interface is also connected to the trusted module connector through the voltage level converter, the voltage level converter is also connected with the switching switch, the switching switch is connected with the first power supply and the second power supply, the switching switch can switch between the first power supply and the second power supply so that the first power supply provides a first voltage to the voltage level converter, or the second power supply provides a second voltage to the voltage level converter, wherein when the first power supply provides the first voltage to the voltage level converter, the voltage level converter converts a voltage of a signal received from the SPI interface into the voltage, and when the SPI interface provides the SPI interface to the voltage, the SPI interface converts the voltage of the signal to the voltage, and when the SPI interface is connected with the second power supply and the SPI interface can transmit the signal to the SPI interface.
2. The circuit of claim 1, wherein the first trusted module is a trusted platform module or a trusted cryptography module, and the trusted module connector is adapted to externally connect the trusted platform module or the trusted cryptography module, respectively.
3. The circuit of claim 1, wherein the voltage level shifter comprises a first port group, a second port group, a first power port and a second power port, the first port group connected to the SPI interface, the second port group connected to the trusted module connector, the first port group tracking the voltage of the first power port, the second port group tracking the voltage of the second power port, wherein the voltage of the first power port is the voltage of the SPI signal received from the SPI interface, the second power port connected to the switch and the power interface of the trusted module connector.
4. The circuit of claim 3, wherein the switch comprises a jump cap and a power connector, the power connector comprising a first input terminal, a second input terminal, and an output terminal, the first input terminal connected to the first power source, the second input terminal connected to the second power source, and the output terminal connected to the second power port, the jump cap being disposed on the power connector to selectively electrically connect one of the first input terminal and the second input terminal to the output terminal.
5. The circuit of claim 1, wherein the first voltage is 1.8V and the second voltage is 3.3V.
6. The circuit of claim 5, wherein the SPI signal output by the SPI interface has a voltage of 1.8V.
7. The circuit of selectable trusted module voltage modes of claim 1, wherein said processor is a Feiteng D3000 processor.
8. The circuit for selecting a trusted module voltage mode according to claim 1, wherein the voltage level converter is a bidirectional voltage level conversion chip with a model of RS0208YTSS20, the first trusted module is a trusted cryptography module, and the trusted module connector is a model of SWF-PHD2006.
9. A computer motherboard comprising the circuit of any one of claims 1 to 8 for selectable trusted module voltage modes.
10. The computer motherboard of claim 9, wherein the first power source comprises a motherboard P1V8SB power source and a motherboard P1V8 power source, and the second power source comprises a motherboard P3V3SB power source and a motherboard P3V3 power source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420031955.2U CN222189780U (en) | 2024-01-05 | 2024-01-05 | Circuit capable of selecting trusted module voltage mode and computer motherboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420031955.2U CN222189780U (en) | 2024-01-05 | 2024-01-05 | Circuit capable of selecting trusted module voltage mode and computer motherboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222189780U true CN222189780U (en) | 2024-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420031955.2U Active CN222189780U (en) | 2024-01-05 | 2024-01-05 | Circuit capable of selecting trusted module voltage mode and computer motherboard |
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